I have a 78ish 115 hp Johnson. The throttle assembly doesn't move as much as I think it should. In reverse it hardly moves at all. Shifts into gear ok. Last week had it out and ran fine for a while then lost power. Had it at full throttle and wouldn't do much more than idle speed. The throttle assembly on the motor has a screw that limits the throttle from going past a certain point.
Do I adjust the screw or replace the throttle cable? Why would it run fine for about 20 min and then lose power?
Do I adjust the screw or replace the throttle cable? Why would it run fine for about 20 min and then lose power?