I have a new to me motor that ran great about four trips. During that time frame the only thing I did was add three cans of seafoam to about 60 gals of gas. The last two trips if I throttle up quickly the rpms abruptly drop from 4000rpms to about 2000rpms and it does this several times before...
I have a 2004 yamaha 90 hp four stroke with 35 hours. Last time I took it out it would stall at idle. After numerous attempts to start it, i finally got it to idle. When I throttled up it would stall at about 1100 rpm. When i throttle up and get past that stall point it would max out at...
