OK ... mystery solved. Recall that I origionally said that the engine was a 200 hp as per what I was told from the PO. But it was pointed out to me that the carbs were 225's, based on the pics of the butterfly plates clearly showing 3 screws in each butterfly. I thought nothing more of it until today as I was getting ready to install the carbs back onto the engine when I noticed that the 3 good carbs from the old, melted carb set looked like they had a smaller venturi than the 3 new 225 replacement carbs that I was installing. I did some measuring and found that I was right. So what I actually had from the PO was an engine with the 3 screw butterflys of a 225, but the plastic bodies of a 200 mounted onto them.
So here's my questions? What should I be running? Understand, I have a complete set of 200 carbs with 200 (2 screw) butterflys, and a complete set of 225 carbs with 225 (3 screw) butterflys. I know that the 200 should give me better MPG...will I see any great performance difference if I use the 200's instead of the 225's? My thoughts are that if it's ok to do, I'd like to use the 3 screw butterflys. That way I can use either the 200 or the 225 carb bodies, depending on how I want to set up the engine.
Ferm, Spare and Skools... I think this is in your ballparks. I would be greatful for any suggestions or opinions.
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1987 V20 w/1987 150HP Yamaha on a Shoreland'r Trailer
1978 16.5 Airslot w/1996 120HP Force on a Four Winns trailer
1996 V21 w/1993 200HP Mercury on a Shoreline Trailer
All towed by a 5.7L Hemi Durango.
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