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  1. W

    Merc Timing Problem

    "77 Merc 351 Windsor right-han "77 Merc 351 Windsor right-hand, 233hp, 2bbl, points ign, single screw inboard. I set the idle timing at around 10 degrees. There a problem with the timing advance. It quickly advances 7 degrees to 17degrees total, but as I rev it further, it stays at 17...
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    Coughing and wheezing at high rpm

    "I've done a lot of work o "I've done a lot of work on the engine and boat side this season, with help from some threads on the forum. 1977 Mercruiser 351 233hp, 2 bbl, elec ign, raw water. I now have one remaining problem whenever it gets above 3,500rpms. It should be able to WOT...
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    351 Motor hootinb and hollerinb

    "I just changed out the distri "I just changed out the distributor, put in a Pertronix II electronic ignition, changed plugs and wires. On turning over, getting a lot of backfires, popping, smoke backing up out of flame arrestor. This goes on for a bunch of turns of the keybut eventually...
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    Hand cranking motor

    "Hi, I need to pickup a socke "Hi, I need to pickup a socket to crank the motor to cylindar 1 for installing a new distributor. Does anyone know what size socket it would be for the crank nut for a Mercruiser 351W? I could probably get an adjustable wrench in their and guestimate the size...
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    Compression test question

    "Hi, I plan on compression te "Hi, I plan on compression testing the Mercruiser 233 hp, 2 bbl. I understand that after setting up the test, that you open the carb all the way before turning the ignition. How about the fuel line - am I supposed to pull it from the carb and plug it? Or do I...
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    Mercruiser firing order

    "Hi, Does anyone know the fir "Hi, Does anyone know the firing order for a Mercruiser 233-R? I have a Trojan F26 w/ inboard. Thanks, Dave"
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    Right track to installing electronic ignition

    "Hi, I'd be grateful for "Hi, I'd be grateful for help with electronic ignitions. I have a Trojan, with a mercruiser 233hp 351 with carb and distributor. Can anyone point me to a good match, with manufacturer and model. It looks pretty easy to install, but I'm new to this type of sytem and...
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    What performance to expect from Merc 351 233hp 2bbl

    "I'm trying to get our 197 "I'm trying to get our 1975 Trojan Express F-25 to the right performance. It has a '77 Mercruiser 351 233hp, 2bbl, and I just put on a 13x10 prop, which improved the rpms. After switching out the prop, I took it out on calm water and got WOT at 4,000 rpm and about 16...
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    Which plugs for Mecruiser 233hp 351

    "Hi, I have an inboard Mercru "Hi, I have an inboard Mercruiser 233hp 351 in a '75 Trojan F-25. I think that based on the serial number the motor is a 1977 build. I pulled the plugs and they're ACDelco vehicle engine plugs, not marine. I don't have a manual for the motor so don't know...
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    Engine wonbt turnover

    "Hi, I have a Mercruiser inbo "Hi, I have a Mercruiser inboard 351 Windsor 233HP. It won't start. The symptom is that its not getting fuel. I pulled the spark arrest and watched the carb spray during ignition. When I turn the ignition and accellerate, it sprays for about half a second and...
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    White smoke from exhaust

    "I have a 5 cyl V8 single inbo "I have a 5 cyl V8 single inboard setup - I believe it's a Mercruiser 302 or the like - and I have white emission smoke at any rpm above 1000. The temp gauge will hit 180 degrees when I'm at about 1,200 RPMs. As the RPMs increase over 1,200, the temp will...
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