new 15hp mercury surging

the man

Petty Officer 2nd Class
Joined
May 26, 2007
Messages
182
brand new 15hp mercury 4 stoke, electric start, remote controls. surges under a load up and down maybe 3-400 rpms at about 1200 or 1400 rpms (do not have tachometer installed). i have checked the tank vent, even took the cap off, new fuel, new tank, new fuel line, new engine. (less than one hour on engine).

called the place i bought it from, they are not very helpful;- want me to bring it in. I understand that i guess, but two problems -i don't have time to pull the boat, bring it there, and then wait for it; also i am kind of hesitant to bring it to the same place that test ran it to begin with. thats why i bought a new engine, so i WOULDN'T have to bring it in!

anyway, any ideas where to start on this one? any 'common' issues with this engine?

thanks in advance
 
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