mercury outboard problem

40 hp for stoke efi bogs at full throttle and starts stalling back off throttle will idle fine

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Mar 14, 2012
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MERCURY DEAD IN THE WATER
by: Anonymous

have same prob on 02 mercury 40hp 4 stroke efi. have had it in shop several times with no luck. i change fuel filters and had new water pump impeller etc.put on after mechanic said that it was overheating and locking in gaurdian mode. there was no alarm to ever sound. Talk to another mechanic said sounded like a fuel delivier prob and it was what they call a cough wheeze. an also said that injecters needed to be cleaned. It dosnt do it all the time my go out to fish and it run good all day then take it out again and it mess up. VERY DISCOURAGED!!!!!!!!!

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