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    Yamaha guages

    I have a 2002 Yamaha OS66 200hp. I Have just installed it and the tach unit. The tach has alarms but since I have a water pressure gauge and a temp gauge in the dash from my previous motor I figured no harm in hooking them up to the Yamaha. On my old mercury I could hook the temp gauge to the...
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    What Year is my ox66 200hp Yamaha?

    The last letter of the serial # on the motor bracket is scratched off. It starts with SX200TXR? Is there any other spot this # appears on the motor. I have narrowed it down to a range of years from 99 to 05 but that is as close as I can get. Were there any notable changes to this motor that...
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    25hp 4stroke merc won't hit top rpm

    This motor in new and I assum it is over pitched as the rpm are fine in netrul, but under load it will only hit 1/3 of the rpm it should. I checked the linkage and it is working correctly. Is there anything else I can check. The fuel pump is working fine and the fuel rail is clean, could it...
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    Mercury Starter Bendex

    How many teeth should there be on the starter bendex for a 1990 merc 135hp black max?
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    Merc carb adjustment

    I have a 1994 Mercury 135hp outboard. I have removed the carbs, soaked, cleaned and flushed them out. On all 3 carbs I have set the mixture screws to 1.5 turns out from lightly seated. Each carb has a 2 mixture needles (one on each side of the carb) I assume one is for idle and the other for...
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    Testing the water pump

    I have a 1990 Merc 135hp (On a 20ft Bayliner Trophy) I replaced the water pump but suspect it is not working correctly. I replaced the thermostats, popit valve and installed a water pressure gauge. At idle the water pressure gauge barely registers maybe 1 to 2 lbs it does go up when I increase...
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    Carb adjustment

    I have a 1956 Mercury 20hp (Mark 25 Model) It has good compression and new plug. I cleaned the carburetor and flushed the fuel lines. I can get it to run in the start position and it sounds good but when I turn the handle to the shift position as the rpm's drop it dies. I believe to to be the...
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    Water prussure guage

    I have a 1990 135hp Mercury Black max. I purchased a Faria water pressure gauge and can't find the location to thread into the block. I assume since it comes with a threaded insert there must be a plug on the block I can remove to install it but can't find it. Or do I need a different...
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    Fuel Mix

    I cleaned out dads garage this week and found great grandpa's 1956 Mercury Mark 25 (20hp) Has spark and good compression going to clean the carb this week. Does anyone have a recommendation for fuel mixture 40:1?
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    Will my Prop Fit ?

    I have a new Solas 13.25 X 17P Prop that I purchased for my 90hp Mariner. I sold the boat and have someone interested in purchasing my prop. Will it fit an 85hp Suzuki ? Thanks
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    Honda 45 stalls under load

    My Honda four stroke runs fine in the driveway but on the water test it dies as soon as I push it past idle (Under Load) My guess is a fuel issue, I cleaned the carbs today did not see any obvious issues. Checked the fuel filter, lines, fuel pick up and changer the plugs. Compression test...
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    Honda water pump

    I just purchased a 1993 45hp Honda 4 stroke. Just fired it up in the driveway, purrs like a kitten but no water coming out the pee hole. I only ran in for about a min. Is there a thermostat that need to come up to temp before water will start coming out the pee hole or might I have a water...
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    Inboard Motor Questions

    I just purchased a Bayliner Capri with a OMC 3.0L and a Cobra Leg. My boat shifts perfectly, running in the driveway but on its first water test at the lake it required me to shift past neutral to get the boat out of gear. (Forward and reverse) Does it make any difference that I shifted it...
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    OMC Outdrive Compatibility

    I have just replaced my OMC 140 and now have some issues with my cobra leg and am debating either repair or replace. I am getting a quote on repair, but would also want to find prices on suitable replacements. Are there any other brands or models of outdrives that I could use without changing...
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    Omc Leg Gasket

    When re-installing an OMC Cobra leg back on the boat should the gasket be installed dry or should it have some Black Permatex on it? I have heard I should not use the same stuff I used on my oil pan and valve cover ? I have also heard it should not have anything on it.
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    Omc Ignition Troubleshooting Help

    I have a OMC 3.0 that had a cracked block. I purchased a long block then swapped everything else over to the new block. I have it installed but now have no spark. The ignition worked fine before I swapped it over to the new block. It turns over fine, There is power to the coil. The...
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    Omc Ignition Wiring & Swap

    I have a cracked Omc 3.0 , I have picked up a Merc 3.0 long block with perfect compression and am swapping every thing over. My OMC is an 1988 with point style ignition and my replacement block has electronic ignition (1989) Should I swap out the distributor and use all my old stuff or can I...
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    Omc Compatability

    Will a 3.8L Omc motor be a suitable replacement for a 3.0L OMC (Is it the same block ?) Thanks for any info.
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    Omc 3.0 Question

    I am looking to replace my cracked OMC 3.0 Dose anyone know if the Merc 3.7L is the same block as the OMC 3.0 I am wondering what my replacement engine options are that will work with my OMC leg, motor mounts and manifold. Cheers,
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    OMC Head crack

    Hello, I removed my cobra 3L inboard to change the rear main seal. Once I had the flywheel off I noticed the frost plug was pushed out. (due to the unexpected cold weather before I had a chance to winterize it). Upon further inspection I concluded that the block had not suffered any serious...
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