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Go Back   SailNet Community > On Board > Gear & Maintenance
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  #11  
Old 07-03-2008
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75R20 is on a distinguished road
It takes three things for a engine to run........do you have them?
1. fuel......... proper mixture of air and fuel. You need to verify.
2. Compression.....you probably have this one because the motor ran, but a quick compression test will confirm. Bad timing chain ? how many hours on the engine ?
3. SPARK..........your symptoms suggest this but you need to verify this before anyone can help you.

Current flow will cause the voltage drop that you are seeing. It's normal to see lower voltage while cranking, and then higher voltage with the key in the on position, and the rising voltage is normal as the battery recovers after a high amp load such as cranking will cause.

Re-read my first post and go from there after verifing these things..

My bet is this.......The "box" has failed and is not breaking the circuit to the coil to trigger the high voltage spark. This will cause the coil to heat up excessively and then go bad also. Feel the electrical parts on the motor and isolate the items that get hot.

just my $ .02 worth of fuel and we know how far that will get you.

Kary
#49080
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  #12  
Old 07-03-2008
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75R20:

Short of a wiring schematic I'm not really sure how to trace it any farther than the big wiring harness that plugs into the engine. I ran it straight from that wiring harness to the ignition, and nothing changed. I also found a purple wire going into the alternator, but as I said in last post (un)plugging that had no effect.

Also, the engine was running fine until fuses started blowing so I am thinking the electrical problem should probably take priority...

The engine was just rebuilt last year, it worked all season. Then we parked it
for winter and some water got into the engine compartment, ruining the starter and the blower. Those got replaced last week, and now here we are.
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Old 08-04-2008
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Did you end up figuring this out?

I'm having the same exact issue. Could definitely use a tip on this one if you were able to fix it.
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