"We have a 92 Yamaha ProV 175
"We have a 92 Yamaha ProV 175 on a 21' Grady. Ran fine for years. Suddenly it lacked the power to get up on plane. So the investigation started:
Compression is good on all cylinders, 115-125.
We pulled each plug wire off under load and found that the bottom...
"92 Yam 175 Runs and idles gre
"92 Yam 175 Runs and idles great up to around 2000 rpm then starts missing and kicking something terrible, like it will jump off the back of the boat!
We tried all fuel related things like new diaphragm pumps, filters, and running from a separate can and also...