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Boat Repair/18 hp johnson does not rev out to full throttle


I have an 18 hp - 1961 Johnson Seahorse and the motor does not rev out to full throttle.  I have changed head gasket and no improvements have been noticed.  What is wrong with motor and how do I go about in fixing it.

first an engine of that age came with points and condensor under the flywhell wich should be wich should replaced every couple years.....
Pull both spark plugs out, lay the spark plug to the engine againdt the block and crank it over and see if both spark plugs have spark..
do that and we can go from there....

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Everett Peacock


Marine repair questions


35 years experience

Taught Marine electronics at NOVA CC IN ALEXANDRIA VA

certified, Yamaha outboards,yamaha stern drives, Mercury outboard, Mercruiser, Evinrude. Johnson, Mariner, suzuki, Volvo Penta, Honda,

Awards and Honors
service exelence award ( yamaha)

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