www.iFourWinns.com

I have a 92 5.0 OMC Cobra. the problems I am having are as followed, when going from idle to full throttle the motor wants to cut out so I had to play with the throttle to get it to run then when trying to make turns it also tried to cut out, had some issues fixed last year, brother n law replaced the carb a few yrs ago. the timing was to far advanced and the jets were too small. since then the problem is a lot better but still have problems with motor cutting out when going from idle to full throttle. I have replaced filter. what can i do to fix the problem?

Get a carb rebuild kit. Accelerator pump isn't working.

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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

Start with the basics, fuel tank vent, anti siphon valve, fuel filter.
Then move on the carb and ignition system.
Lastly another member had a Performance problem that turned out to be exhaust flappers blocking the exhaust.

On my old boat it would start and idle fine, it would rev up in neutral fine and both the ignition advance and the accel pump were fine. Turned out to be the anti siphon valve on the gas tank.

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88 Four Winns 200 Horizon
4.3 OMC Cobra-4bbl
2002 Walker Bay 10/2012 Suzuki 2.5
2008 Walker Bay 8

1998 Jeep Grand Cherokee 4.0/Selectrac
2007 Jeep Grand Cherokee 5.7 Hemi/Quadradrive II

All of your symptoms, especially dying out on turns indicates low fuel level in the float bowl. Assuming your carb rebuild was a good one with a properly set float level, I'd be looking into a fuel pump pressure and volume test. Change the filter first and see if that helps.

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07 Azure AZ200,
Previous boat,
95 278 Vista,
And a lot of others.

Ontario, Canada