Hi Jackson,
Considering condition 1., I would focus on the fuel system since it
appears you are not in an overloaded or air starved state.
With the vibration indicator let's eliminate a bad injector. At the
dock, put in gear and load up the engine. Wrap plenty of rag or paper
towel around the first injector and break the HP pipe going to it. I
highly recommend using a flare nut wrench so you don't round the nut.
Observe & record the RPM drop.
Retighten & regain RPM.
Repeat on the other injector.
The lowest RPM is the worst injector. Service both if one is bad.
Cheers, Russ
Sweet 35 mk-1
At 11:24 AM 20/08/2012, you wrote:
To clarify:
1. exhaust smoke looks just fine, as does the amount of water splooshing out
2. The powdery/rubbery stuff was only in the bilge.
3. We actually dove on the boat, so no fouling of prop and no
excessive marine growth to account for the slowness.
4. The alternator and water pump belts were replaced by me about 4
weeks ago. The pulleys look rusty, but only on the edges, not in
the grooves where the belts run. The belts are new to me, but old
to the boat, so it's possible that they werent the best thing to put
on...still, they seem to be working. I checked the tightness, and
they are within spec.
thanks for all the input so far!
-Jackson
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