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    1984 75hp L4 with unique problem? I'm baffled!

    Gee, I hope that works for you. I never found the bleed restrictors to do anything but lower the quality of the idle. Maybe your motor is different than my IL6 and Il4 motors.
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    Water in fuel

    Letting the water settle to the bottom of the tank is a good idea. Now siphon from the bottom of the tank, into a clear container. One of those "shake-shake" siphons work's well. You should let the clear container settle and you should be able to see the different layers. If in doubt, a...
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    Mercruiser trim pump has a leak.

    The reservoirs tend to crack when the single mounting bolt is too tight. So tighten just enough not to leak.
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    Cooling problems

    That waterpump should create 30+PSi at cruise speed. I have never had any issue with them but remove the water grates and see that the passage is clean. A couple of notes. The gasket under the wearplate is glued to the gearcase. The oring under the SS cup uses some silicone to retain it, 4...
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    Winch replacement suggestions

    In my experience, West Marine never has the best price on anything, but they can be convenient.
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    9.8 110 mercury wont throttle up anymore

    Check the compression to make sure she is not damaged. If compression and spark are good, try richening the carb idle mixture 1/8 turn and see if that helps. The larger Mercs (IL4, IL6) of that era needed a rich idle mixture to allow them to rev up. If you set the idle mixture to idle...
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    Winch replacement suggestions

    Winch straps sit in the sun all the time. After some time, they get rotten and brittle. Then they wait for you to winch the boat up, and at the worst time, they break. So either change them every 3years (Depending on how much sun they get) or go with cable. I swapped my strap for a 3/8"...
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    Bigfoot runs for 2 seconds and dies

    The carb may need to be cleaned. First test is to remove the high speed jet cover bolt and pump the primer to see if fuel runs out. If it does, then it is likely the carb idle circuit is clogged. If no fuel then the inlet needle is stuck or some other part of the fuel system is clogged. You...
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    No spark on Merc 85hp

    If she popped with fuel sprayed into the carbs, it sounds like the carbs need some attention. One more thing. The trigger on your ignition can become intermittent. They can work for some days and then fail, and then work for some more time. Also, check the spark plug wires for resistance and...
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    Bigfoot runs for 2 seconds and dies

    Carb, EFI or something else?
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    96 Johnson 150 Setting idle

    Since you are doing your own work, you might invest in a factory service manual. Marineengine.com sells them. Have your model number handy.
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    What do these knobs do?

    In the old days, carb jets were adjustable for both high speed and low speed. That appears to be what you have. More modern carb engines just have low speed adjustments, and high speed jets are fixed. It was especially fun to adjust the dual highspeed carb jets on my '58 Fat-fifty, since you...
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    No spark on Merc 85hp

    If you spray 50::1 fuel into the carbs and she doesn't at least "pop", you have no spark, or the timing is way way off. A '73 will have timing marks on the upper cowl support. Remove spark plugs and stick a screwdriver in the top spark plug hole. Set that piston to top dead center and look at...
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    Alpha 1 Gen 1 oil fill hose

    Castrol Super Clean (and the generic "Purple Stuff") is a good degreaser. Use full strength, wait a bit then wipe it down and hose it off.
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    Cant seem to find information on motor.

    Maxrules has a serial number to year table.
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    Smoke, high temps and louder than normal

    Impeller replacement is the same on most motors. The gearcase must come off, the impeller, wearplate and 2 gaskets must be replaced, as a minimum. If the cup in the waterpump top is scratched, replace that. If the waterpump base is melted or the driveshaft seal is bad, replace the waterpump base.
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    No spark on Merc 85hp

    OK, next test is to see if you have spark. You must have +12VDC on the red wire and the adjacent white wire on the switchbox to have spark. If you have spark, spray some 50::1 into the carbs, close the choke shutters and crank her up, cold start lever all the way up. If she doesn't fire...
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    No spark on Merc 85hp

    Those quick disconnect plugs often can be the area of high resistance. For testing purposes, you can wire the battery directly to the starter solenoid and the ground bolt on the lower cowling. Standard battery cables will allow this. Are the ground straps from the block to the lower...
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    No spark on Merc 85hp

    I could not get the video to play for some reason. If she turns slow with a good battery, the wiring is bad or the starter is bad.
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    Adding A Sail

    Trawlers often had a "balance" sail. It was not meant to power them, just to act as a stabilizer.
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