Re: 1975 Johnson 135 questions
If you run the engine on the trailer, there is no exhaust backpressure (from the exhaust being 20" underwater.) For that reason, the engine will rev up a little more. Usually around 1200-1300 when idling on the trailer. That's normal. Should be 650-700 when idling in gear, while floating normally-in the water.
If you run the engine on the trailer, there is no exhaust backpressure (from the exhaust being 20" underwater.) For that reason, the engine will rev up a little more. Usually around 1200-1300 when idling on the trailer. That's normal. Should be 650-700 when idling in gear, while floating normally-in the water.