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    Piston replacement in a 6hp Evinrude

    I need to replace a piston in a '65 6hp Evinrude. I do not have the exact year but I have a piston from a mid forties Johnson, 5.5hp. The piston is the same width but is a bit longer. Will this work in the 6hp Evinrude power head? Thanks, Gary
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    Will this piston work for me?

    I have a 1965 Evinrude, 6hp, model 6502m that needs a piston. I found a power head from a 1964 3hp Evinrude, model 3432 that has good pistons in it. I check my manual and it shows that the stroke, bore std and bore oversize are the same for both motors. That piston from the 3hp should work in...
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    Which prop should I use?

    I have a 1974 Merc, 9.8hp model 110. It has a spun prop. I have two questions. One: would it be worth it to fix it or should I just get a new one? Two: I can get another prop but I'm not sure if it will work on my motor. The one I have has two blades with part number 48-31504-10. I can get a 3...
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    sending unit question

    My fuel gage doesn't seem to be reading properly. It won't read much higher than 3/4 of a tank when full or much lower than 1/4 of a tank when low on gas. I found a procedure to check the gage and it seems to be operating normally. The procedure tells me that the sending unit should read 30 ohms...
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    What is a spun prop??

    I have a 1967 Merc, 9.8hp model 110. I had it out on the lake and it ran fine. When I went to use it next, it started fine and went into gear ok. But when I throttled up, the motor revved up really high and didn't go anyway. When I turn the throttle down to a slow speed, I was able to get back...
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    What spark plug should I use?

    I have a 1971 Johnson, 9.5hp. I thought I had the right spark plug in it but was told it wasn't the right one for this motor. The manual I have list Champion J4J but I was told it is no longer available and J4C is a suitable replacement as is L77JC4. Which is the right one? Thanks, Gary
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    71 Johnson 9.5hp starts/idles fine but runs rough in gear

    I have a 1971 Johnson, 9.5hp. Some call it squat motor. I can start it fine and will idle ok but when I put it in gear and start to throttle up, it begins to miss or hesitate if that is a better word for it. I can't get full power at full throttle. The thing is I started it in a barrel before...
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    1971 9.5hp Johnson crankshaft key keeps breaking

    Hello all I have a 1971 9.5hp Johnson. Some call it a squat motor. I couldn't get it to start. I found that the crankshaft key had broken and the flywheel must have been spinning around the shaft. I thought it would be an easy fix. I got another key and it snapped off after I got the motor...
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    removing power head from 71, 9.5hp Johnson

    I want to remove the power head from a 1971 Johnson, 9.5hp. Some may refer to this as a squat motor. I have an idea but before I start removing bolts, I want to make sure they are the right ones. The service manual I have doesn't really tell you how to remove it. Can anyone tell me? Thanks...
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    gasket sealant question for 1958 5.5hp Johnson

    I replaced the water pump on this 1958 5.5hp johnson. In doing so I removed the motor. I am replacing the gasket that goes between the motor and exhaust housing. Should I put sealant on this? My repair manual does not mention if I should or not. Thanks, Gary
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    compression check for 1958, 5.5hp johnson

    what should a typical compression check be for a 1958, 5.5hp johnson? The motor just doesn't run at top speed at full throttle. I checked it and both cylinders are at 40 psi each. Thanks, Gary
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    1971, 9.8hp runs at half power

    I am working on a 1971 Merc 110, 9.8hp motor. It will start after a couple of pulls and idles nice. Sometimes when I throttle up it will run at full speed. Other times it will run at what I think is half speed at full throttle. This is happening more frequent. I have taken the flywheel...
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    1973 Mercruiser carb problem

    My '73 mercrusier has a V-8 with a 2 barrel Holly carb on it. It starts good but idles rough in neutral and when I throttle up from a slow crusing speed, it hits a spot where the engine either sputters and then increases speed or it just stalls out. If I push the throttle slow, I can get past...
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    spark plug wiring on a mid 50's Johnson

    I recently replaced the plugs, wire and coils on a mid 50's Johnson, 15hp. I also cleaned out the carb and the compression is real good but I can't get the motor to start. I do have have good spark on both plugs. Does it matter what coil goes to what plug? I may have mixed the two up when I did...
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    '67 Merc, 9.8hp shifting problem

    I have a 1967 Mercury, model 110, 9.8hp. The problem is it stays in forward gear. It won't shift into neut. or reverse. I have the lower unit off and I can shift it into forward/neut./reverse with no problem. It mates up with the shift shaft from the top half but I think it maybe stripped...
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    merc 9.8 lower unit swap out

    I have a 1967 Merc 110, 9.8hp that needs the forward and reverse gears. I have found a lower unit from a 1973 Merc, same model and HP. Can I use the gears from it to put in the '67 lower unit?<br /><br />Thanks
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    1958 Johnson 5.5hp rebuild question

    The power head on my 1958 5.5hp Johnson has froze up, cylinder damage. Can I replace it with a power head from a 1958 10hp Johnson or will the lower unit not support it?<br /><br />Thanks
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    '67 merc, 9.8hp lower unit question

    I took the lower unit off a 1967 110 Merc, 9.8hp to replace the gear bearings. I notice there weren't any gaskets. Are there suppose to be any gaskets or seals to replace while I have this separated?<br /><br />Thanks,<br />Gary
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    finding year of motor without model number

    I have a mid 50's Johnson that I'm not too sure what the year or HP is. I need to get some points and condensers but I'm told that I need the model number to get the correct parts. The model number has been scatched off. I do have a readable serial number. Can I find the year and HP from that...
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    18hp motor got wet, it will not start

    I have an 18hp Johnson. It was made in the mid fifties. I had it running great this weekend. I was taking it off the boat in shallow water and let it drop into the water. It wasn't sumerged but a few seconds. Before I tried to start it again I took the rotor off and let the points dry off. I...
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