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    Need gear ratio for 1985 Yamaha 25HP (25LK)

    Hi all,<br /><br />I'm looking for specs on the lower unit gear ratio for a 1985 25 HP Yamaha 2 cyl outboard, model 25LK. I'm looking at buying a used lower unit and want to make sure the ratio is the same. Looks like it will bolt up but I'd like to make sure it's the right one.<br /><br...
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    1991 100HP misfires when listed to starboard

    Hi all,<br /><br />Here's a good one for you... I have a recently rebuilt 100 HP V4 commercial model (J100WTLEIB) that runs rich most of the time. I haven't been too concerned about that as I am still breaking it in. But one interesting thing is that when cruising along on a plane, during a...
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    Yamaha late '80s 25-30 HP gearcase interchange questions

    Hi all, I have a Yamaha 25 HP long shaft (20"), unknown year but suspect late '80s. Numbers off plate: 25LK, 6H7, L, 301225. I need a gearcase/lower unit.<br /><br />There is a gearcase available with the following numbers: 30LH, code 6J8L, serial 401041.<br /><br />Here are the questions:<br...
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    73 65HP crankshaft interchange question

    Hi all,<br /><br />I have a 1973 Evinrude 65 HP with a bad crank (the spline is severely worn). Actually I have two of them - I bought a 73 Johnson 65 HP for parts but one rod journal was damaged and its crank was bent.<br /><br />So anyway, I know 72-73 65HP motors used the same crank, but...
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