DuaneS Show full post »
Peddler
Peddler wrote:
Just checked the SN and realized this is an 8KW and after checking the wiring diagram I have to revise my advice.  As was stated the battery charger circuit is not fused to the battery so the battery charger should still work with a blown fuse.  This unit has a firewall mounted solenoid which may be the culprit for blowing the fuse.  You need to amp probe the 56 wire going to the solenoid from the control board.  The 56 wire also continues on to the choke solenoid so you need to make sure you check amperage at the correct place so you see what both devices are drawing.  I have replaced several of the choke solenoids recently on these which were causing the fuse to blow.  The 8 KW's are often hard starting in cold weather and it is often the coil which is the cause but they are also susceptible to air leaks in the fuel system so you have to check things carefully.  I would bet on the coil first.


Please disregard this response as I must have entered the wrong SN in looking for a schematic.  I would go back to my orginal thought that the starter is the most likely cause of a fuse blowing during the crank cycle.
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grsthegreat
i agree with starting with the starter. I have had these unit that blow the fuse after a few seconds of trying to start up in the past. the fuse never blows immediately. If i disconnect the wire at the starter and try to start the unit the fuse holds. After replacing the starter the issue has always been resolved. if the fuse still blows after the starter control wire is removed, than theres another issue causing it.
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DuaneS
Thank you all.  Ordered the charger and the motor just in case.  Won't arrive for a few days, so will replace both when they arrive and hope that solves the problems.  Will report in after the installing the parts. 
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78buckshot
Thanks DuaneS, we appretiate any up-date.
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DuaneS
EUREKA!!!  Weather finally let up enough to install parts.  Installed new charger and tested output - 13.8 VDC.  Connected new battery and charging correctly.  Just because I had them, installed new plugs and checked for spark - good spark.  Replaced air cleaner because I had it.  Didn't check valve lash because I couldn't find my thin feeler gauge - project for the future along with the oil change when snow is gone and temp is higher.  Didn't change to the new starter (it was cold out and seemed a lot of work so figured I see what happened first).  Set for exercise and waited.  One cycle with a cough and stop and then fired up on second cycle.  No issue with Fuse blowing.  Final conclusion - Bad Battery and Bad Charger.  Did one take out the other - no idea.  78buckshot originally suggested the charger could be taking out the fuse and I'd guess that is correct.  So I have a spare starter just in case it starts to act up again, but no point in changing it if its working correctly now.  Thank you all for your suggestions and help.

Duane
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78buckshot
Thank you for the update Duane, glad you got it going, it's not bad to have the spare starter on hand as it is a somewhat common point of failure, I would check the valve lash at the next break in the weather.
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