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post #1 of Old 09-23-2011 Thread Starter
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1991 Johnson 3 HP problem

Hello, I have searched in vain for a solution to a problem with the new to me, 1991 Johnson 3 HP outboard I bought recently.

For the last four outings it ran great, now it seems to only speed up until half throttle then stays there no matter how high I push the throttle, it doesnt speed up.

it will spit and kick into higher speed for an instant but then back to slow speed.

I thought it was fouled plugs but can not so far get teh bolt out of the center of the cover to get at the plugs, its pretty buggered upa nd rusty and it so far will not budge, I have marvels oil on it now hoping it seeps in and loosens it up.

two people with me were of the opinion that the half speed was caused by 1 cylinder firing, but in neutral I can revv it up much too high if I wish too, but under load its not performing as it was originally.

any ideas?

thanks and great forum.
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