Hello Everyone,
I have a 1993 115HP Johnson Model #TJ115T attached to a 24' pontoon. It's a 4 cylinder or to say it has 4 plugs. I've only had the boat a few months. I have drained the gas, run only non-ethanol gas, changed the plugs, and replaced the water impeller pump. The boat runs strong most of the time. Really smooth. In neutral it rev's over 4000RPM. And most of the time on the water, and low weight (3 people or less), at WOT it is right at 4000RPM. But, other times its only 3000RPM at WOT. Still runs smooth. Just doesn't have the power. Doesn't want to get out of the water.
It's like it has a governor or a restriction in the leakage. But, you can put it in neutral and it's back to 4000 rpm. But under load it goes back to 3000rpm. It might do this for half an hour and its back to 4000rpm. Does it cold and hot. Temperature doesn't seem to affect.
I'm not sure what to do? Where should I start?
Thanks for your help, Stuart
I have a 1993 115HP Johnson Model #TJ115T attached to a 24' pontoon. It's a 4 cylinder or to say it has 4 plugs. I've only had the boat a few months. I have drained the gas, run only non-ethanol gas, changed the plugs, and replaced the water impeller pump. The boat runs strong most of the time. Really smooth. In neutral it rev's over 4000RPM. And most of the time on the water, and low weight (3 people or less), at WOT it is right at 4000RPM. But, other times its only 3000RPM at WOT. Still runs smooth. Just doesn't have the power. Doesn't want to get out of the water.
It's like it has a governor or a restriction in the leakage. But, you can put it in neutral and it's back to 4000 rpm. But under load it goes back to 3000rpm. It might do this for half an hour and its back to 4000rpm. Does it cold and hot. Temperature doesn't seem to affect.
I'm not sure what to do? Where should I start?
Thanks for your help, Stuart