120 Johnson outboard


Old 08-04-08, 07:03 AM
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Join Date: Aug 2008
Posts: 1
120 Johnson outboard

I have a 90 johnson that seems to run great full throttle but then sometimes it seems at full throttle it runs/feels bogged down.
Any ideas.
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Old 08-04-08, 04:41 PM
Join Date: Jul 2008
Location: Montgomery MN
Posts: 541
I would Install new spark plugs this probubly won't fix it but sets a good base line for other tests. Then I drain the fuel from the float bowls on the carbs if you can drain them into a clear jar. It sounds like water in them and you can see it in a clear jar it will be seperated on the bottom. If water is found drain your fuel tank and install a water seperating filter between the tank and motor.

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