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Motor looses power at full throttle but picks up rpm’s when I decrease throttle
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<blockquote data-quote="Ga Aquadog" data-source="post: 493034" data-attributes="member: 32205"><p>I recently found a 1990 Johnson 9.9 motor still on the original shipping pallet. Never run. Has been in storage for 32 years. Hard to believe but true. I bought a new 3 gallon gas tank, fuel line primer bulb & fuel line fitting. I have used it 5 times. Always starts on first or second pull. Ideas great. Runs smooth at low and medium throttle but as I approach full throttle it loose power and runs slow again until I back off to about 3/4 throttle. Then it picks up speed to what feels like full throttle. When I increase the throttle it slows down again. Then I slowly increase throttle and it speeds up until I get close to full throttle and it does the same thing. It is hard to keep the throttle at the spot where it runs the fastest. If I increase it just a little it runs slow and I start the whole process over. Any help would be appreciated.</p></blockquote><p></p>
[QUOTE="Ga Aquadog, post: 493034, member: 32205"] I recently found a 1990 Johnson 9.9 motor still on the original shipping pallet. Never run. Has been in storage for 32 years. Hard to believe but true. I bought a new 3 gallon gas tank, fuel line primer bulb & fuel line fitting. I have used it 5 times. Always starts on first or second pull. Ideas great. Runs smooth at low and medium throttle but as I approach full throttle it loose power and runs slow again until I back off to about 3/4 throttle. Then it picks up speed to what feels like full throttle. When I increase the throttle it slows down again. Then I slowly increase throttle and it speeds up until I get close to full throttle and it does the same thing. It is hard to keep the throttle at the spot where it runs the fastest. If I increase it just a little it runs slow and I start the whole process over. Any help would be appreciated. [/QUOTE]
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Motor looses power at full throttle but picks up rpm’s when I decrease throttle
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