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Loss of power

ggjames

New member
"I have a 1990 Johnson 3 hp mo

"I have a 1990 Johnson 3 hp model 3BRESR that seems to run ok with no load, but loses power when in gear. At first the engine will run ok for a short time, but as it warms up the problem appears. I can keep the engine running if the throttle is kept at no more than a fist idle. Any more will stall the engine. Then suddenly the problem will clear, and it will run fine for a few seconds up to a couple of minutes; but then the problem reoccures. I have disassembled the carb. and blown out the ports and jet with compressed air (it seemed to be clean inside), checked the vent cap, replaced the spark plugs, and checked the sea water pump impeller (ok)., checked the fuel tank strainer, and replaced the fuel line. Nothing has resolved the problem I am beginning to wonder if the problem may be electrical instead of gas. Any suggestions would be appreciated. Thanks"
 
"George,

Sometimes older en


"George,

Sometimes older engnies can't get the fuel mix that they need. At low speeds they want to run rich, but at higher rpms they want a leaner fuel mix.

Tony"
 
"Always test and trouble shoot

"Always test and trouble shoot. Rig up a way to check the strength of spark. Spark should jump a gap of 1/4" or more, if not you have trouble with ignition components and it would be wise to test the components before starting the guess and replace method of repair."
 
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