Fishing Forum

I have a Johnson 25 hp that I am having problems with.

It ran great at it's last location at 300' above to 150' below sea level.

I now have it at a lake in southern Utah @ 5600" above sea level, and it runs like crap.

I'm hoping it is just a matter of changing the jet size.

Does any body know of a reliable person that could take care of that or maybe rebuild the carb. if it needs it?

I'm near Beaver Utah.
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What year is the engine? I'm thinking it will have mixture adjustment needle valves for both high & low speed operation.
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I brought a Johnson 35 out to Utah from Michigan. All I had to do was adjust the one carb mixture knob (lean-rich) on the front of the cowling. I had to turn it all the way to one side. Then I removed the small screw in the front of the knob, took off the knob and pointed it in the other direction, then replaced the knob and screw. Then I re-adjusted the carb again.
The knob would not turn enough in one direction so I had to remove that screw so I could continue to turn the adjuster. It worked and I never had to rejet the carb. I sold the boat to a friend and he is still using the motor. Its been over 10 years now and the motor still runs great.
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