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Johnson 25 hp outboard engine problems?

Jun 17, 2007 by Le Nuez Vert` | Posted in Maintenance & Repairs

I have worked on alot of engines but never an outboard 2 cycle, so here goes:
1) The engine is a 1973 Johnson 25 hp, and it idles fine, but from 1/2 throttle to 3/4 throttle it sounds like its running on 1 cylinder and then goes to 2 firing cylinders,

It's been alot of years, but let me take a stab at it.
As for the points, they would be under the flywheel, should be accessible through a cover on the flywheel.
It does have a fuel pump, where the fuel line connects to the engine on the

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