I have 2 new HondaBF15's that basicly do the same thing, after the
proper break-in i do a high speed run down the lake and start troll at
low speed ,after around 30 to 40 minutes they have a misfire and or
will stall, one will do this approx. every 3 to 5 minutes and the other
alot less frequently but will still have this misfire and or stall, the
latter engine does run a little rough until you up the rpm's at
start-up. This misfire (could also be termed sputter,flutter, bad
shake, whatever term you want to use) can be seen at dealers tank so
that rules out my KNOWN good gas because i tried different stations,
different grades, isopropal, that chevron techron stuff, and sea foam
sprayed thru carbs.The first motor had the plugs pulled at dealer after
idling in tank for about 40 minutes these were as follows one tan and
one a little darker, tan to black , just for kicks i changed both plugs
, problem still there.The second motor that does this less frequenty
the plugs are between a dark tan and black but definately not
fouled.Idle speed was checked and set per specks.I'm told by Dealers
that that they sell tons of these with no problems, I troll for hours
at a time, is a constant bad misfire and stalling normal (they start
right back up ? I was only looking for the same performance i got from
14 years of trolling with a Yamaha 15 2 stroke, it never skipped a beat
and only changed the plugs once a year. Anyone else have this problem
or symptom.