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Intermittent electrical problem
I have a 1989 Wellcraft I/O powered by a 3.0 Mercruiser. I am having
intermittent electrical problems. Sometimes the motor doesn't crank,
and sometimes after it starts the tilt/trim control doesn't work. At
other times starter works fine as does tilt/trim (repeated efforts to
start ot raise/lower unit meet with success). I wonder about battery
cable connex and also a faulty voltage reg. Anyone have any other
ideas?msd47 |
msd47
Jul 19
2006
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| All great ideas. I would add to that pay especial attention to grounds.
An experienced (auto--not boat) mechanic recently told me that, when he
had wiring problems it almost always included bad grounds. And most (not
all) of the wiring problems I've troubleshot on my little boat seem to end
up going back to bad grounds.
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FWB
Jul 20
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| I agree, grounds are often overlooked. And since a boat is mostly
plastic sometimes the return path is through a lot of ground
connections. |
jamesgangnc
Jul 21
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| I have an older boat also, 1990, and I have experienced various poor
connections. Anything that is just crimped on probably has developed
resistance. I have also found that even those multi-connect rubber
plugs can develop corrosion and resistance after a long time. At one
point I was getting about 8 volts at the hot wire to my ignition.
Testing with a voltmeter shows various small voltage drops at
connections. The external appearance of any connection is no
indication. Same for the battery terminals. You need to take it apart
and wire brush the metal where the two meet. I removed some
connections and simply soldered the wires together and covered them
with heat shrink. Others I cleaned. On wire connections to terminals
and bolts I added stainless steel inside star lock washers. These have
teeth inside the washer and the teeth bite into the lug. Particularly
where main power wires were. msd47 wrote: |
jamesgangnc
Jul 20
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| I wonder about the battery cable and connections also. ;-) You could also
have multiple solenoid problems.
Jim |
Jim
Jul 20
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