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Mercury verado flush cap leaking

Since the water is brackish I want to drain the system asap and get the water out. The proper oil level is a bit of a problem with engines that are often removes and stored/transported. There’s a huge 130-gallon fuel tank aboard. How to flush the coolant antifreeze in a 1994 Mercury Tracer 1. Pressure check the tank-to-master-cylinder connection for leaks with air only, depressurize, fill the tank with brake fluid, pressurize, and take a leisurely walk around the car cracking bleed screws with a wrench and catch can. NEW Mercury Verado Seal Kit Steering Cylinder 8M0045604 896173A01 FSM035. $11. Save 10%. Check the primer bulb for proper functionality and the condition of the 300 VERADO FOURSTROKE Page 2 / 13 90-8M0070751 Lubricants, Sealants, Adhesives Tube Ref No. I have a 2014 Silverado . 2 Stainless Flush Cup-holders Standard Upper Station Show Cap Cover $750 Power steering fluid leaks are usually caused by a cracked or worn-out hose that feeds the power steering pump. Seems fine now but the inside of my oil cap smells like a old lawnmower (gas) . • If an oil leak is observed from a porosity hole in the supercharger end cap, install the supercharger end cap kit (8M0045222). Mercury Racing Propellers offer the ultimate in performance and durability. #2. 1100-3281 A1 Upper End Cap Fits Merc 500 & 50hp 4 cyl. An electric pump runs the hydraulic fluid in the power tilt and trim system, and if you get a leak, the hydraulic fluid will ooze out and allow air to replace it in the system. Since my approx 36 years experience with hydraulic steering is generally on vessels under 90 ft in length (ZERO Mega Yachts), let’s look at my input as being applicable to boats Mercury - Mariner Outboard Fuel Line Assemblies & boat parts, other Mercury - Mariner boat parts Javascript is disabled on your browser. • If an oil leak is observed at the supercharger input shaft seal, install the supercharger end cap kit (8M0045222). Compression Test 101. Marine engines can often be used for extended periods at wide open throttle (up to 6000rpm on some models) in harsh salt water and sun, then sit in storage over winter for up to 6 or 7 months without any use. 00 Sale. If you notice coolant near the radiator or the radiator cap, then you clearly have leaky coolant. I've seen those pumps on Amazon, google, and ebay for $150ish. Some say ground the plug cap, some don't. An issue with the power steering fluid, when you shut the car off within a few seconds the fluid will start leaking out the cap. I think after a couple hard runs under load it will clean up. Rating Required Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name. You may change your registered address at any time, including at time of warranty claim, by calling Mercury Marine or sending a letter or fax with your name, old address, new address, and engine serial number to All-Star: An expert that got 10 achievements. VANOS Solenoid Failure. Country: usa. Here it is in a nutshell. Power, performance, reliability, efficiency or fun … whatever drives you, we guarantee you will feel it Answer (1 of 11): It can be a bad head gasket. Remove the cap completely. 50. If it is a large leak, it is best to consult a professional. Mercury 350XL Verado $140,500 Mercury 400RXL Verado $144,650. Removable. 95. Was spraying at idle with a light spray and all the way to WOT with a heavier spray. There seems to be some air or block or something in the system. Remove all your spark plugs with a ratchet and appropriately sized socket. Might check the fuel filter. stop, and look for oil. Flange dimensions: 3-1/2” x 4-1/4”. Similar to the N54, a leaking valve cover, valve cover gasket, or PCV valve are among the most common problems with the BMW N55 engine. You can do this by simply by adding BlueDevil Pour-N-Go to your vehicle’s radiator when your vehicle is cold. thru 150 6 cyl. Answer (1 of 5): Assuming the cap is not defective and is installed properly, the only way oil would leak through the cap is due to pressure in the crankcase. Read PDF Mercury Verado 150 Service Parts Manual Mercury Verado 150 Service Parts Manual Thank you for downloading mercury verado 150 service parts manual. kits for 135,150, 175 & 200l-4 hp engines; kits for 200, 225, 250, 275 & 300hp engines; kits for 350 and 400hp engines Mercury Authorised Dealers have the expertise and training to handle all of your engine maintenance service and needs. Threw CEL. Turbosonic Trim Pump Cap- Plain Colors. Mercury 135-150-175-200-225-250-300 Verado Water Pump Impeller Repair Kit - 817275A09. Stainless steel and black plastic. How to troubleshoot and repair an automotive engine cylinder misfire P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307 and P0308, though appearances may vary, the process is similar for most vehicles. Attached is a photo of the problem. Raise and lower the motor about six times Typically, you should flush and replace the coolant every 30,000 miles or five years, whichever comes first. mercury precision lubricants; fuel care system; cleaners & protectants If the engine is leaking oil from the rear and over the transmission, the likely cause is a rear main seal leak (commonly attributed to overfilling the engine). List $244. The Mercury Verado is a superior outboard motor. (You save $2. Cylinder Configuration V-6. Pretty much warm/hot water is coming out of the fresh water flush port. Water vapor enters the crankcase of all motors from the atmosphere, and as a by-product of combustion. Location: long island n. Re: mercury verado problems. posted 12-23-2008 12:58 AM ET (US) The power steering system is mandatory on all the six-cylinder Verado motors, but I believe it is an option on the four-cylinder models. 39 shipping. Outboard Parts: Mariner Outboard: Intake & Fuel. 40 Hp 4 Cyl Mariner. Also, there is a misconception that people believe that you need to run the engine in order to flush it. If you were to google "how to perform compression test", for every link that provides instruction there are just as many conflicting procedures. Mercury outboard motors with a hose attachment can be flushed without starting the motor. Allow the motor to flush for 3 minutes. 30 Hp 2 Cyl Mariner. ) Have a customer with a power steering pump failure. In other motors, the oil gets rather hot and any water vapor that may condense will steam-off and exit the crankcase breather. Step 2: Insert the Verdao Easy Injector # 1 The cap on top of the reservoir kept leaking (another problem/design issue with those reservoirs) so an entirely new unit seemed like a good idea. The Art of Speed. Radiator cap leaks. 55. It is not going to be a cheap motor but you are paying for a high-quality item. mercury 200 verado manual pdf download, mercury trim motor ebay, power trim leak your source for verado information, verado power trim ebay, substitutes for outboard tilt trim oil it still runs, how do i check tilt trim fluid level page 1 iboats, 135 150 175 optimax marine motors, verado power trim has a new power tirm installed by, mercury Listed here are common causes for your coolant to be leaking: 1. 05 oring that wants to die. Displacement (L) 3. Or it could be just a bad radiater cap. Remove the gas cap to see if that fixes the problem. 4. If the radiator cap doesn’t no longer fits as it initially did or if it is weak and wore out it can cause loss of your systems coolant by way of the overflow tube, and it will happen every time you run the engine very long. My volvo 2006 s60 was loosing coolant every other day and couldn’t find any leak. This Mercury Water Pump Repair Kit applies to the following engine models: 135-150-175-200 - 4 Cylinder Verado - Serial Number 1B311420 & Above. It is installed and serviced by Mercury Trained Mechanics. Based on where you find the oil leak, there are various steps necessary to successfully repair it. Motor seemed to be running just fine. Step 4. Leaking Oil Filter Housing Gasket. If the radiator cap is stuck, pressure may build inside of the radiator, which could cause cooling system components to leak or burst. Add to cart * All sales are final * Please be sure of your Discussion Starter · #1 · Apr 7, 2014. If motor oil is leaking from the front of the engine, it’s probably the front main seal. 135, 150 Hp 6 Cyl Mariner. So I figured out the coolant is leaking into the engine probably because a blown gasket. If the level is adequate, the problem is most likely with the Check Power Trim Fluid Mercury Verado Outboards mercury verado problems what you need to know about verados, amazon com mercury genuine synthetic power steering fluid, 200 225 250 275 verado 4 stroke marine motors, verado power trim ebay, tilt amp trim repair help for mercury amp mariner outboards, flushing kit simmercury com, Fixing a leaking heater core will always be much easier than replacing one. Black plastic cap snaps closed to seal. 50 Hp 4 Cyl Mariner. Even in perfectly sealed engines, water intrudes and forms condensation within MERCURY MARINE VERADO SERIES EASY INSTALLATION GUIDE STEP 1: Facing the rear of the engine power head, identify injection point #1 as indicated by the yellow arrow in the picture to the right. HP/kW 250 / 184. 2 In Stock - Ships Immediately. I have codes 172&175 running rich on banks 1&2 . These manual are designed to equip you with the necessary knowledge to do justice to everything from your outboard’s basic maintenance to a more in-depth service and repair. Hi there, There are degrees of head gasket problems, not all issues with head gaskets will cause a massive pressure problem, I would be getting a head check done, this is a simple chemical test to check for exhaust gasses in the cooling system, also have the pressure cap brake off pressure tested and have the radiator checked for a partial blockage, a back flush will not be enough the tanks The motor has been leaking since new. Add to Wish List. Start by checking the hydraulic fluid reservoir level. The Final Word Mercury Marine 250 hp verado (4-stroke)(6 cyl. 1) Leaking Coolant. Run the fault codes to determine what sensor/s put the engine /gear box in limp mode . I found a couple of videos showing that the Highpressure fuel pumps have a tendency to leak in these engines (5. FLUSH PLUG KIT FLSHPLGKIT. A water flow problem is indicated if the water temperature is excessively high. 20, 25 2 Cyl Mariner. Test out your boat's operation at full throttle again. Replace the radiator cap securely, then start the vehicle. Add to Compare. That is not true. 75:1. Length: 9-1/2”. If so, adjust the belt properly. Most sealants require that you run the vehicle for at least 10 minutes to ensure maximum circulation of the sealant to fill the cracks and holes. This is simply added to your power steering fluid, and can help plug the hole. check the oil. This step by step how-to-video will walk you through the process of flushing your 6-cylinder Mercury Verado engine. 3s) do you have any experience with this Mercury Sable. We have 4 Mercury 250 VERADO manuals available for free PDF download: Manual, Installation Manual, Brochure & Specs Start and run the engine until the steering pump fluid drops halfway. At the position indicated, remove a 1” section of the hose with tubing cutters. Max { sump }. If you catch it early enough, it is possible to fix it with a power steering stop-leak. . yup. Use your oil can with a flexible hose to fill the oil up to that level. Replaces the standard yellow cap on hydraulic trim reservoirs used on Eddie Marine Tabs as well as Mercruiser, Mercury, and Kiekhaefer s. Mercury Racing Propellers. Examine fuel filter for clogs, and fuel line for kinks or leaks. Comments Required. Creating Distance. 00 ea $30. New NLA Part Quantity 2 Used NLA Part Quantity 2. 4 psi water pressure and appears to be outputting about 3/4 of the discharge stream as the … read more. . 4-stroke outboard motor oil doesn’t get Sometimes the actuator ram seals will leak and the fluid will be around the base of the ram, or drip down around the power tilt and trim motor. Mercury Marine has improved the retention method for the rubber end sheet. Then slow down. I think mercury used to sell a pump kit full of orings and valves for your system but withdrew it from market. Engines: cummins QSB 380. Vessel Name: Riverwind. don t get mad but there is a mercury verado forum down the main page in the motors forum but you d check fill the same as a yammie trim it up deploy the motor bracket and open the cap for the reservoir, mercury optimax 225 hp power trim tilt sagging search a hurricane arrival the last thing i steering fluid west marine, 200 225 250 275 verado 4 stroke marine motors, how do i add hydrolic oil for mercury power tilt, power trim leak your source for verado information, power trim fluid overfill your source for verado information, mercury marine quickbite tips checking power trim fluid, which oil goes in this reservoir boat talk Flush mount with predrilled holes for 1/4” fasteners. Mercury notes that this procedure should be used when flushing the engine after use in salty or dirty water, and also as a part of preparing the outboard for storage. Check the oil level in the pump. The leak is at the top seal of the reservoir on the right side where the two metal pieces come Push the hose adapter into the flush connector until you feel the snap of the connection being made. It’s done it before but normally only at idle and would normally stop as RPMs increased. For 3 days went away . Helpful 0. 225/250/300/350 Verado L6 Belgium ‑ 0P568238–0P575810 Situation Mercury Marine has received isolated complaints of engine oil leaks on outboards listed above due to movement of the rubber end sheet inside the integrated oil module. Maybe you have knowledge that, people have look hundreds times for their favorite books like this mercury verado 150 service parts manual, but end up in malicious downloads. This is referred to as “Making oil”. Posted on Aug 28, 2014. myshopify. Since it is only a small leak in the heater core, we recommend simply sealing that leak and leaving your heater core in place. By flushing the internal water passages o Mercury 75hp Leaking Water at Flushing Connection on 16(39) Element-gctid754420 07-30-2016, 04:26 AM My 2016 Mercury 75 began squirting water out of the plug where a hose can be connected for flushing. The entire power steering rack should also receive your attention. The O-ring can become, hard and brittle, from the heat of the engine. If leaving the gas cap off for 5 to 7 minutes does not solve the problem then go to the next step. Air vent in fuel cap not open. Merucry tells us the twin 350s can push the 310 SLX OB up to a top speed in the low 50s, with an efficient cruise in the low 30s. I have read the spec sheet here and it shows oil temp 260 deg. If the engine has a flushing port, you can hook up the garden hose, turn it on, and with the engine tilted up, let it run for 5, 10, or 15 minutes, or as long as you’d like. When the outboard motor fails to start, verify all of the following: Gas in the tank. 1997 Mercury Villager verado 100 hour maintenance kits. source for verado information, mercury 200 verado manual pdf download, mercury services welcome to lhg marine inc, how to replace hydraulic fluid on a outboard trim tilt, verado power trim ebay, mercury trim motor ebay, tilt amp trim repair help for mercury amp mariner outboards, power trim leak your source for verado information, 94 25 ec as A. Email Required. Mercury Diesel . Comes with rubber mounting gasket. Fuel shutoff valve is on. 03-22-2013 #7. Regular price $36. My Mercury Villager 1997, heats up. 9L 4 Cyl. Check to see if the radiator has holes in it or if the cap looks worn or damaged. I replaced the cap and leak went away for awhile only to return from other areas unknown. 00 Our Price $20. 2009 verado 275 overheating at idle 212 F the gauge reads. 81 Anti-Seize Compound Spark plug threads 92-898101385 mercury maintenance kits. Plus, there are finance options available. If the hoses and clamps check out OK, move on to the power steering pump. Lack of raw water flow and lack of fresh water can cause water pump failure. • If an oil leak is observed at the upper crankshaft seal, replace the upper crankshaft seal Mercury 150 4 Stroke Flush Line Sprays. I flush the radiator, change the radiator cap, put new thermostat, don't leak water, and still heats up. But I don't see water circulating, can any one help please. So, the most common cause of leaky injectors is; the failure of the O-ring, where the injector meets the fuel rail. 2009 verado 275 overheating at idle 212 F the gauge reads 1. My smart craft shows I am running at no more then 249 deg. com/collections/shirts #MercuryVerado #FlushFitting #WaterleakA quick tutorial on how to chan 2006 mercury verado 200 my flush out cap on one motor is leaking water when motor is running Marine Mechanic: Jason , Marine Mechanic replied 4 years ago Got it. Check for a dirty or old spark plug, improper carburetor adjustments, or broken or faulty ignition wires. verado 100 hour maintenance kits kits for 135,150, 175 & 200l-4 hp engines; kits for 200, 225, 250, 275 & 300hp engines; kits for 350 and 400hp engines; verado 300 hour maintenance kits; new verado & non-verado v6 & v8 engine kits; engine care products. During the warranty period Mercury's postion was that I over tightened the filler cap based on the fact that it was indeed where one leak was detected. In a different thread townsend had mentioned a compression test, which had me thinking. Mercury Repower Financing service can get you out on the water, fast. take the cap,off when the car is cold. jpg Hey guys, first time posting, having an issue with my 2017 Bayliner VR6 with a Mercury 150HP. 4 out of 5 stars. Pull the dipstick and confirm the oil level. This is the oil filler cap. 00 each Used $25. Verado four-stroke outboards: No description of using flush muffs is shown in the manual, only the engine's hose-adapter fitting. $19. Our propeller artisans handcraft each prop into precision-tuned works of art. On warmup I see it climb past a bit then drop to 240 then creep up again to 249. Leaking Externally Or Internally. ive never seen this happen on a motor unless it has problemsmine smoked a ton on muffs. Prior to the coolant flush procedure, the coolant reservoir (aka surge or overflow tank) must be removed, drained, cleaned and reinstalled before refilling the system. 1000im aluminum transom cap assembly 6224 2,000 1,506 1000im @mercury 4" vessel view upgrade-dual verado 3853 130 98 1000im flush mount siren & amp w/o strobe A pair of 300-horespower Mercury Verado outboards are standard, but our test craft was fitted with twin 350-horsepower Verados. A leaking pump will eventually leave puddles on the ground. Check for lack of raw water flow by noting the temperature of the outlet side of the system. Follow Mercury Dockstore on Instagram Find Check Valve- - 8189941 here. CDK retired engineer. recently the power trim system on this older boat (1987 Mercury 150 XR2 Black Max) has started to leak and the fluid is a milky red indicating water in the system. sounds like hes got lower unit seals leaking. If it breaks, then fuel can leak out, over the engine. If the tilt and trim motor works fine but the engine won’t raise or lower, slips down when in the raised position or won’t stay trimmed, chances are that the problem is with the hydraulic pump or valve body assembly. Use a plug gap tool to set the correct measurement on your plug gaps, according to your manufacturer. Check the engine oil level by tilting the engine vertical and allowing 5 minutes for the oil to fully settle. Allow the engine to warm up and the radiator to circulate the sealant according to the sealant's printed instructions. 1. The oil should come up to the second thread on the filler spout. A unique three piece internally baffled leak-proof plastic cap. y. If it is, when the car is cold start the engin you will see bubbles come up in the reservoir. 10. 24. I’m getting a pretty good spray of water out of the flush line while the motor is running. The nipple is located on the left side (driver side) of the carburetor. Description. You have a first class Japanese machine, it is highly unlikely that it really leaking. of Mercury Marine products sold in the United States, should a safety recall notification under the Federal Safety Act be required. no oil running out anywhere. Follow Mercury Dockstore on Twitter. If the gas cap is not venting correctly the unit could be vapor locking and be causing this problem. Sedan How-to video for petcock, radiator flush and burping on a 1994 Mercury Tracer 1. The Mercury Outboard Repair Manual is a comprehensive guide for Mercury/Mariner Outboard models as it lays out all the service procedures for DIY enthusiasts and mechanics. #14. 86) Get it Tue, Aug 17 - Fri, Aug 20. Topic: Verado Fresh Water flush leak: thirdrail: posted 08-10-2008 05:49 PM ET (US) Anyone seen water spraying out of the cap on the freshwater flush? Usually at leak photo. Every time we forgot to loosen the vent screw on the fuel tank cap after switching tanks, the engine would run fine until it sucked enough fuel to create a vacuum in the tank; then it would start bogging down from fuel starvation. Choose from 323 Mercury Sable repairs and services for model years 1990 to 2009 to get a RepairPal Fair Price Estimate™. in the pump somewhere is a $0. Sterndrive Engines. 3. We’re using the universal round pressure cap, but direct fit adapters are available. $16. One common cause, the formation of water as a gasoline byproduct, is part of normal engine operation. List $32. Fits Mercury 800/80 hp New NLA Part Quantity 1. It's coming out of the two small holes built into the cap. Also give the hose clamps and other connections a careful inspection. You can be reassured you are in safe hands with a Mercury Verado. Born Again Boating Clothing! https://bornagainboating. Water Pump Failure. N55 Valve Cover/Valve Cover Gasket Oil Leak. Flange dimensions: 3-3/8” x 4-1/4”. Yes, you probably already understand hydraulic steering, but I think I may look at hydraulic steering a tad different than most do. After the motor has flushed for 3 minutes, release the hose adapter from the flush connector by pressing the Jun 22, 2010. I have also piloted a four-cylinder Verado which lacked the electro-hydraulic boost or power steering, and I commented on the helm effort needed. 60 Our Price $50. Fuel Induction System 2-Stage Direct Fuel Injection (DFI) Alternator Amp 60 amp / 756 watt (Belt-Driven) Gearcase Ratio 1. 12-03-2016, 11:49 PM. 95: 622-4850 A3 Piston Rod Fits Mercury 402 2 cyl. Outboard Parts: Mariner Outboard: Midsection, Trim & Tilt. Clean any residue from each plug contact and plug port. 3 out of 5 stars 4. 50, 60, 70 Hp 3 Cyl Mariner. The most common cause of outboard motor overheating is water pump failure. Step 2: Insert the Verdao Easy Injector # 1 March 14th, 2019 - Verado Power Trim Has a new power tirm installed by mercury tech The trmi works but the engine will not stay up it Answered by a verified Marine Mechanic To check fluid trim the drive all the way up and set it down on its trailering locks Open the resivoir cap and check to see that the fluid is at the threads off the cap If The cap on top of the reservoir kept leaking (another problem/design issue with those reservoirs) so an entirely new unit seemed like a good idea. cogito, ergo sum (Descartes' credo) CDK, Jan 15, 2011. 00 pr. Like Mercury Dockstore on Facebook. High Pressure Fuel Pump Failure (HPFP) – Mostly older models. … Mercury Marine Fishing and Boating Headwear. Full throttle RPM 5500-6000. For the Mercury Four Stroke & Verado. My dad had a bass boat with an 85 mercury outboard that used portable 5 gallon fuel tanks. Shellkat. Mercury Verado Oil 25W-50: Recommended Fuel: 92 octane recommended; 87 octane compatible (up to 10% ethanol) Engine Protection Operator Warning System: SmartCraft Engine Guardian: Compatible with Smartcraft Digital Technology: Yes: Shaft Length: L - 20 in (508 mm) XL - 25 in (635 mm) XXL - 30 in (762 mm) Dry Weight * Lightest model available Specifications Optimax Pro XS. Offering discount prices on OEM Mercury Marine parts for over 50 years. The I have a 275 verado and it is leaking water though the flush…. Marine Hydraulic Steering Systems. I'm happy to report, I've taken the boat out several times since the fix, ran it to Catalina an back a couple of times, and the problem has been resolved. sold each. Finally I checked the oil and it was like a coffee and milk and over the limit , same the top cap where you pour the oil. Black, burnt, or milky oil should be replaced and may indicate bigger issues. The cooling system will release scalding fluid and steam under pressure if the radiator cap or surge tank cap is removed while the engine and radiator are still hot. Carry out the repairs then use a scanner to reset the CPU program. Mercury Auto Repair Centers Near Quincy, WA 98848 Discussion Starter · #1 · Apr 7, 2014. Hardin Marine is a leading manufacturer of high performance boat parts and accessories for the marine industry. Since I've had the boat I've never seen this. It can be very hard to find because it often will not leak until there is pressure in the system. Description Where Used Part No. After the motor has flushed for 3 minutes, release the hose adapter from the flush connector by pressing the Mercury 115 1994-95 Leaking water from the thermostat I have an Mercury 115 1994-95 it is leaking water from the place the thermostat is, other owner told me it was because water here in the north is so cold. To view this site, you must enable JavaScript or upgrade to a JavaScript-capable browser. Mercury Master. Mercury Diesel engines offer a sophisticated diesel-engine experience: Advanced Page 34/43 MERCURY MARINE VERADO SERIES EASY INSTALLATION GUIDE STEP 1: Facing the rear of the engine power head, identify injection point #1 as indicated by the yellow arrow in the picture to the right. Not really sure what the problem is, but are you sure it is leaking out the cap? The coolant tank on the 97 Taurus is notorious for getting a crack in it and when the pressure builds up it will leak. Review Subject Required. Optimax Pro XS 250 HP. $3. Re: Tilt/trim leaks down overnight. If the level is adequate, the problem is most likely with the Unscrew the recessed screw cap, usually on the front right corner of the pump. 200-300 - 6 Cylinder Verado - Serial Number 2B144123 & Above (Gen V) This is a heavy duty special tool made for Mercury Tilt Caps Only on all Mercury V6 Trim & Tilt Units Works on Gen 1, 2 & 3 Units 1986-2017 135hp -300hp Gen 1 is a side fill unit 135 150 175 200 225 250 300 This is a precision made part for a tight fit when biting into a End Cap / Gland this prevents slipping Push the hose adapter into the flush connector until you feel the snap of the connection being made. Outboard Parts: Mariner Outboard: Cowling Cowls & Covers. If you notice any erosion, replace the plug. Damaged O-Ring Causing Injector Leak. 0. The power steering gets worse and worse gradually, the usual systems, stiff steering wheel, moaning and groaning. SENECA Marine Outboard Motor Flush Kit Flusher Muffs Fresh Water Hose Attachment for Yamaha Mercury Mercruiser Evinrude Honda Suzuki Johnson SMP-OBFLSH-01. Our engines are engineered and built solely for marine duty. We build Mercury MerCruiser® Sterndrive engines and drives to power your life on the water. mercury & mariner fuel recommendations Use a major brand of automotive unleaded petrol (ULP) with a minimum posted octane rating of 91 These recommendations apply to Mercury and Mariner 2-Stroke, 4-Stroke, Verado and OptiMax models unless specified otherwise (ref to "Notes & Exceptions" following) There are several factors that cause water to get into the engine oil, including leaking intake manifold gaskets, cracked engine castings and a blown head gasket. 53,816 Answers.