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I have a 1975 johnson 25hp, on the bottom of the bowl there is a orifice plug does this plug get seated all the way or is there a recommended setting for it? Also what is a good starting point to set the slow speed needle?
I let my buddy borrow my boat when he returned it and I used it again I found the motor was smoking bad. After checking a few thing I found he mixed way to much oil in the gas. I pulled the plugs and turned the motor for a while then i mixed the proper mixture 50:1. The motor started right up...
Do you measure the length from the bottom of the engine to the cavitation plate to tell if it is a long shaft? 21" should be long and 16" should be short right?
I have a this engine on a 15.5' custom boat that was built for a go-devil. I have tried to go up and down with the engine but it keeps cavitating on me. I cannot tell what size prop that is on it now. Could the prop be causing this problem and if so what size prop do I need? Oh yea the prop...
I have a custom built 15.5' boat. It was built for a Go-devil, now I am trying to run a 1975 25hp Johnson on it. According to the numbers on the engine it is a long shaft. My transom measures 17" and with the engine on it the cavitation plate sits about 2" below the boat. When I run it starts...
