M470 Backfires

ljgill

Recruit
Joined
Nov 23, 2010
Messages
5
I just got my boat and it sat for 8 years. I rebuilt the Carb changed the filter and gas lines and put in new gas. It starts fine idles fine and goes full speed fine but getting it to WOT is tricky. If I accelerate moderately no problem but if I slam on full throttle it backfires through the Carb and quits. Any suggestions would be appreciated.
Thanks ljgill
 
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