Crank bearing???

AU10 said:

1988 Johnson 140 V4 looper

I was out running the other day, and all the sudden lots of engine noise (sounded like somebody picked it up and shook it) so i throttled down quickly and shut it off. Just did a compression check, 110 on all 4... When turning the flywheel in gear and in neutral, it has a rough spot that is tough to turn. Would this be the crank bearings? How tough/expensive of a fix is this? As you can probably tell, I don't know a ton about outboards or engines at all.

Also, what would've caused this issue? I know it wasn't running hot or lack of oil in fuel...

Thanks in advance for any help/advice!

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multimech said:

Could be the lower unit. Pull the drain plug and look at the oil. If you see a lot of metal in it, pull the lower unit and try turning the flywheel. If it turns easy, it is the gearcase. The gears are always driven. If you have a broken tooth or teeth it will make the sound you are talking about and the noise.

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jbjennings said:

You may have lost a magnet in the flywheel. I'd remove the lower unit and if the bad spot is still there, I'd remove the flywheel. IF all the magnets are there, then research other possibilties. Could be a bearing but I'd say it's not likely if you've had oil in the fuel.
JBJ

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