www.iFourWinns.com

Hey Lou, thanks for the suggestions, I'm going to look into all of those possibilities.

One thing that confuses me, however, is that this stalling, and bogging down on throttle up, doesn't happen when I have the boat out of the water and am using the muffs. The obvious question is, does the engine behave differently if/when the drive is not engaged?

Does that make any sense?

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1988 18' Horizon, 4.3L V6 OMC Cobra
2006 Chevy Suburban to pull it

The load on the engine from pulling the boat makes all the difference....when I was having trouble with mine, it would start and idle fine and would rev up to 3000 rpms fine in neutral on the water but would not plane out the boat...it would accelerate to about 1500 rpms and then fall on its face......the anti siphon valve and carb rebuild fixed it...

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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