I have a 20hp mariner outboard engine which works fine on half throttle but when i put it on to full throttle the engine cuts out. Any ideas why?
2007-05-29 07:02:21 · 6 answers · asked by pat s 1 in Cars & Transportation ➔ Boats & Boating
Could be a partially blocked main jet in the carb??
OR A choked air filter?
2007-05-29 07:11:17 · answer #1 · answered by jayktee96 7 · 3⤊ 0⤋
Depending on the year and type of engine it could be the points and condensers going out or the power pack is starting to go. Other than that, I can only suggest trying to adjust your feul mix ratio at the carb. Usually it's the top knob on the carb. Turn it in all the way then turn it back out about 2 full turns.This should be about perfect for the fuel mixture to help the engine run at full throttle. If not try adjusting it back and forth from there until the engine runs smooth. I had to do these things to a '69 - '70 + 20 Hp Johnson outboard. Other than that make sure your carb is cleaned out really good and you run your fuel out your carb after each use.
2016-05-20 23:45:28 · answer #2 · answered by ? 3 · 0⤊ 0⤋
Definitely sounds like fuel starvation, can't get enough fuel into the engine at full throttle.
2007-05-30 23:26:17 · answer #3 · answered by Mark J 5 · 0⤊ 0⤋
My guess is when you took it apart, you left something in the fuel filter.
I once had to rebuild my outboard 4 times in one day because of this.
2007-05-29 13:53:53 · answer #4 · answered by Timber0 2 · 0⤊ 0⤋
it could be a perforated rubber diaphragm on your fuel pump , not dear to buy and should be replaced regularly , it should be taught and free from any misshape .
2007-05-30 23:13:38 · answer #5 · answered by help! 2 · 0⤊ 0⤋
look at air breather on fuel tank maybe
air fillter
fuel fillter
2007-05-29 12:19:27 · answer #6 · answered by Anonymous · 2⤊ 0⤋