50TLR top cyl not firing-posibilities?

[trex4@cox.net]

Motor wouldn't crank,found dead cell in battery-replaced. Still wouldn't crank,found 20 amp fuse blown near coils-replaced. Started but running rough, changed plugs found top cylinder plug wet-including after new plug. swapped with middle plug to be sure-same condition on top cyl.Had to adjust idle to keep it operating. This was after motor ran great for a month out of storage, two week inactivity and this was result. Looking for suggestions. THANKS !!

[robert graham]

Maybe drain each carb onto clean white rag to check for water or debris in float chamber. Carbs may need removal and cleaning. Is your fuel fresh?

[99yam40]

Check with a spark tester or a inductive timing light to see if you are getting spark on all cylinders.
A DVA adapter and volt meter will show if it coil is getting proper voltage on each.

If spark and compression are good then look at cleaning carbs

[trex4@cox.net]

Thanks, fuel/water separator filter changed and new fuel added-slight improvement at that time. The top plug was still wet as though it wasn't firing,did not have tester with me to check coil operation. Do you know if a common problem would be the coil or the CDI? I don't have wiring diagram to decide why 20 amp fuse was blown. Do you have diagram or info?
Thanks.

[99yam40]

I have heard of people reversing battery leads when hooking up battery that blew fuse, but not much else. Short in wiring maybe.

[trex4@cox.net]

I have heard of people reversing battery leads when hooking up battery that blew fuse, but not much else. Short in wiring maybe.

Thanks, I was able to see the fuse and starter schematic, but I'm not able to get the other 3 views the"Attached Files" suggests . If you wouldn't mind sending it, I would like to see the Elec diagram for the coils and CDI. The lead reversal could have been possible, getting old is not always good!

[99yam40]

I do not know what other ones you are refering to as I only posted the one with the fuse ( start schematic) as that is all that the fuse feeds

[trex4@cox.net]

I see now that the views number has increased-I'm guessing now that it means the times it has been viewed. If you have a little time and inclination, I would appreciate a diagram for the CDI and coil schematic. Thank You Much!

[99yam40]

Not sure what year you TLR is, but must be 06 0r later.
my 99 40 may or may not be the same.
There is a charge coil and 3 pulsar coils that feed the CDI and then 3 outputs to the coils. You need a special volt meter or a DVA adapter and regular meter to take reading like the service manual says and compare to specs in manual.
Do like I said before, compression, spark, and timing. If all of that is good then work on the fuel/carbs

Service manual is worth the money if you plan on working on it yourself.