1975 johnson 50 hp dies at almost full throttle

perner

Recruit
Joined
Aug 25, 2002
Messages
1
THE MOTOR WAS JUST REBUILT BY A PROFESSIONAL. THIS PROBLEM WAS OCCURING BEFORE THE REBUILD BUT THE RINGS WERE SHOT SO I HAD IT REBUILT. THE MOTOR SEAMS TO IDLE FINE BUT AS I GIVE GASSTARTS TO PLANE AND THEN JUST DIES AS THOUGH I SHUT THE IGNITION OFF. IT DOESN'T MATTER HOW FAST OR SLOW I ACCELERATE (IT DIES IF I SLOWLY INCH IT UP). IT SEEMS LIKE THE BOAT IS NOT GOING AS FAST AS THE ACCELERATION JUST PRIOR TO IT DYING. THE CARBS WERE REBUILT AND ARE CLEAN. THE GAS TANK AND HOSE ARE NEW. I LIVE IN UTAH AND FOUND THAT THE JETS ARE FROM SEA LEVEL. A DEALER MECHANIC TOLD ME THAT THIS WOULD NOT MAKE A DIFFERENCE IN HOW IT RAN. HE SUGGESTED THAT THE PROP IS THE WRONG ONE CAUSING IT TO KILL THE MOTOR AT A CERTAIN RPM. I CAN NOT AFFORD TO TAKE IT TO ANY MORE MECHANICS....I JUST WANT TO TAKE THE STUPID THING FISHING. OH!!THE BOAT IS A 14 1/2 FOOT SMALL FIBERGLASS TRIHULL.PLEASE LMK IF ANYONE HAS ANY IDEAS...THANKS
 
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