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1998 Mercruiser 220 hp surging

floorplay

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My 5L Mercruiser 2 barrel carb

My 5L Mercruiser 2 barrel carb is surging @ half throttle. Al else seems fine. It goes up and down approx 50-75 rpm?
 
Sounds like a lean mixture sur

Sounds like a lean mixture surge. Time to look at the carb. More than likely the jets have gotten dirty and are no longer flowing the correct amount of fuel. Before a carb rebuild you can try Sea Foam or the like in your gas and go from there after you run the cleaner through.
also a new fuel filter and check the carb inlet screen for debri etc.

Kurt
 
"Thanks Kurt, I'll look at

"Thanks Kurt, I'll look at those items the best I can tonight. I wasn't sure what it was or where to start. I'll let you know how I make out.

Tony"
 
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