www.iFourWinns.com

Took boat out on saturday for a 44 mile cruise. Ran fine below 4000 rpm. When I went to WOT it then began to sound and feel like it was missing abit and running rough. When I back the throttle down, it continued. When I stopped and then started again, ran fine once again until I did WOT.

Suggestions / solutions??

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1994 235 Sundowner w/351 Ford

Don't go WOT. Hehe....

If it was a car, I would say it was a timing issue. Still could be "spark" related tho. Check your plugs, wires, and rotor.

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1996 205 Sundowner DLX
5.0FL Volvo SX Cobra
Tow Veh: 2012 Nissan Frontier Pro-4X

Rough at WOT is usually spark related. Either gap is too big on the plugs or the coil is growing old. But don't rule out a bad cap/rotor.

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1981 Columbia 8.7
2015 Yamaha FZR - 87mph - sold
2006 Yamaha GP1300R - sold
2003 Chaparral 215 SSI - sold
2009 Stingray 195CS - sold
2000 Four Winns H180 - sold
1976 O'day Daysailer II - sold
Rick's Four Winns H180 Mods/Upgrade Thread

Yup, def look at the ignition side of things.

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Brian Borchik
The Winds of Cold Springs Harbor Marina
Baldwinsville, NY

My buddy had the same problem last week. His starboard engine would not go above 3700 RPM's. Turns out water was getting into the motor. The exhaust is being changed this week and it appears he caught it in time. Check your exhaust.