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D 4 7 U rope start pony question
2 months 3 weeks ago #258943
by d4angelo
D 4 7 U rope start pony question was created by d4angelo
When I pull the rope to start my D4, the rope stops mid turn and almost separates my shoulder. This will happen 3 or 4 times in a row and then it won't happen on the next pull. What is causing this? The pony runs great, minor end play in the crank, no blue smoke when running and does not miss a beat. It can sit for 6 months, then start after only a few pulls of the rope. Any ideas?
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2 months 3 weeks ago #258944
by side-seat
Replied by side-seat on topic D 4 7 U rope start pony question
Timing slightly off or too much gas laying in the cylinders causing a hydro lock.
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2 months 3 weeks ago #258946
by d4angelo
Replied by d4angelo on topic D 4 7 U rope start pony question
Thanks side-seat, I ALWAYS drain the heads before pulling the rope. Only a couple of drops of oil drain out, no fuel.
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2 months 3 weeks ago #258950
by neil
Cheers,
Neil
Pittsford, NY
Replied by neil on topic D 4 7 U rope start pony question
Does it feel like it's backfiring Angelo? Or does it feel like it just runs into a block and stops dead?
Cheers,
Neil
Pittsford, NY
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2 months 3 weeks ago #258956
by d4angelo
Replied by d4angelo on topic D 4 7 U rope start pony question
There is no backfire or miss at all. Purrs like a kitten when running. It just stops dead. After it stops dead, I can easily rotate the flywheel by hand. It does not feel like anything is binding at all.
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2 months 3 weeks ago #258972
by juiceman
Replied by juiceman on topic D 4 7 U rope start pony question
You might have a bad gear or tooth on your pony or magneto. I have seen some with a bit of debris that clung to a tooth and would cause that on occasion.
You need to upgrade to the Italian Stallion starter, powered by hops, but I have heard "it" is worn out now. JM
You need to upgrade to the Italian Stallion starter, powered by hops, but I have heard "it" is worn out now. JM
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2 months 3 weeks ago #258976
by Ray54
Replied by Ray54 on topic D 4 7 U rope start pony question
I believe there have been threads on the mag shaft braking on D4's on here. If I am remembering correctly the thrust bearing is letting the shaft walk back and forth. At some point the gear locks against the case. Mag shaft is the weak link that brakes. This might not be your problem, but it could be. So check the play in the crankshaft.
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2 months 3 weeks ago #258978
by d4angelo
Replied by d4angelo on topic D 4 7 U rope start pony question
Juiceman, the "Italian Stallion" is worn out because of his after work activities.
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