outnumbered
New member
"My 2004 F225 4-Stroke Yamaha
"My 2004 F225 4-Stroke Yamaha (300 hrs) runs great cold, at all RPMs. After warm up, it idles rough - sounds like it's missing. Wide open, runs great. At low RPM's it spits and kicks, sounds like it is loading up and coughing out.
When it is spitting and kicking at low RMPs, Fuel Pressure is bouncing from 40-45 PSIs, else it stays a solid 40. If you let the engine set a couple hours and go back out - it runs great again - until it warms up.
I have replaced the fuel, filters, and separator. Also the spark plugs.
Thoughts???"
"My 2004 F225 4-Stroke Yamaha (300 hrs) runs great cold, at all RPMs. After warm up, it idles rough - sounds like it's missing. Wide open, runs great. At low RPM's it spits and kicks, sounds like it is loading up and coughing out.
When it is spitting and kicking at low RMPs, Fuel Pressure is bouncing from 40-45 PSIs, else it stays a solid 40. If you let the engine set a couple hours and go back out - it runs great again - until it warms up.
I have replaced the fuel, filters, and separator. Also the spark plugs.
Thoughts???"