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posted to rec.boats
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First recorded activity by BoatBanter: Feb 2007
Posts: 5,649
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backfires, no power under load, merc 350s
On 19 May 2007 20:08:20 -0700, wrote:
I just took my boat out of storage after 3 years. It had been
properly winterized and laid up. To ready it for use, I paid a
mechanic to replace plugs, distributor caps, drain fuel tank, replace
filters, change all oils, and re-tune engines.
I took the boat out and ran it only to discover it would not go over
about 1300 rpm on either engine (sterndrives - Bravo IIIs) and it
backfires badly. The engines start and idle fine.
I noticed there was still fuel in the tank, almost a quarter tank
according to the gauge. From memory that could be 40 or more gallons
remaining in a 160 gallon tank. I put in 60 gallons of fresh premium
and then put in another four bottles of 104 octane boost. The problem
did not improve at all.
Any ideas? I am taking the boat back to the mechanic, but I no longer
trust him since he delivered the boat back to me in its current
condition.
There could be any number of issues here, but it may be something
really simple.
And your mechanic should be given first crack at fixing it - he did
the original work - give him a chance to make it right.
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