BACKFIRE AT WOT STARBOARD ENGINE

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PLAYMATE
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Location: NORTH POINT CREEK, MD.

BACKFIRE AT WOT STARBOARD ENGINE

Post by PLAYMATE » Mon Oct 01, 2018 9:51 am

IT SEEMS I MAY HAVE A CARB PROBLEM. WHEN I START UP RUNS GREAT FROM 750 - 3000 RPM RUNS FINE, WHEN I OPEN UP TO 3200 RPM THE 4 BARREL KICKS IN AND I GET A CONSTANT LITTLE BACKFIRE , SOUNDS LIKE A MACHINE GUN. POP,POP,POP,POP,POP. WILL NOT GO OVER 3200. I WAS RUNNING 34-3600. NOT SURE WHAT IT COULD BE?
ITS A CARTER AFB, STANDARD ISSUE.

csgt428
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Re: BACKFIRE AT WOT STARBOARD ENGINE

Post by csgt428 » Mon Oct 01, 2018 11:29 am

Sounds like a lean condition. If you had access to a known good carb and swapped it out temporarily you could isolate the problem to the carb if it runs OK afterwards. Could be any number of problems though.
1963 36' Sea Voayager

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prowlersfish
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Re: BACKFIRE AT WOT STARBOARD ENGINE

Post by prowlersfish » Mon Oct 01, 2018 6:35 pm

Steady pop ? Could be a worn exhaust cam lobe a weak intake spring .
TROJAN F36 Conv.
6BTA Cummins diesels
Life is to short for a ugly boat :D
2009 TROJAN RENDEZVOUS
Port Kinsale 2010 & 2011. Solomons get together 2011.

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