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    Does anyone know where you can order impellers by dimensions?

    Hi there, I ordered the listed impeller according to the serial number etc for my Yamaha/Mariner 8 hp and when it arrived (from the UK which was the only place I could get it!!!) it was too big across the shaft center hole. I'm probably going to have a guess at the one for the next serial...
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    Pumps water until gears are engaged???

    My old (71/72) 8 hp mariner (actually a made in japan yamaha) pumps water but the water stops pumping when I put the motor into gear (either forward or reverse) any ideas?
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    Can an 8 hp function effectively without a thermostat?

    Hi all, I have an ancient (1971/1972) yamaha 8A with a Mariner decal and I just checked and there is no thermostat. Must it have one? What difference will running without make? I live in the tropics so cold weather running is not an issue. thanks
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    mariner serial number id ?? Not pumping water - I think

    Hi there, I have an 8 hp Mariner serial number 647-L 6773 It also says Made In Japan. Can anyone help me with the model number I should use when looking for parts? Particularly I need a water pump kit as it doesn't appear to be pumping water... unless the water needs to be driven by...
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    Is it worth replacing the powerhead?

    My 1976 Johnson 70 hp had lousy compression (mid 50's all three) so I pulled the heads and the cylinders look smooth and ok. The local wrecker can get a used powerhead. What would be included on the replacement? - Like does it have the pistons, crank, cylinders, etc? Is it worth replacing it...
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    1976 Johnson 70 hp - Is it dead? Can I resuscitate it?

    Re: 1976 Johnson 70 hp - Is it dead? Can I resuscitate it? there seemed to be no spark in the leads... I pulled the cylinder heads off and found this The cylinders felt smooth but were all different colours --- number 2 was particularly ashy white/grey and loads of dust rained down into...
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    1976 Johnson 70 hp - Is it dead? Can I resuscitate it?

    Hi all, yesterday I brought home a boat with this 1976 70 hp Johnson Seahorse on it. The previous owner sold it as "seized bottom bearing gone" - in person he told me he overheated it running with a dead water pump (go figure????). When I checked it out this morning I could move the engine with...
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    Merc 50 hp ignition problems - starter?

    hi there, I had the motor running and it seemed fine - never heard the starter miss a beat - tried to start it today and it just clicks and makes a strange electrical sound... when I took off the cowling and tried to kick it over the starter did not appear to spin. I figure the starter needs...
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    Mercury Blue Band 50 hp model number help???

    Hi there, I have a mercury 50 hp Blue Band with the serial number 5275756 and I need the model number so that I can order some parts. Among the things I will be asking for help with are; lower unit oil leak fuel connector (to motor) coming loose side rams tilt and trim installation water...
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