Scott Rolins VH4D

teddy52food

Well-known Member
Looking at the former posts, I believe you have an even fire engine with an odd fire mag. you may get it to run on 1 or 2 cylinders, but not on all. You will need to get an even fire mag or a battery powered dist. to fire them all at the right time.
 
Teddy, His Magneto worked on the engine before, so it should work again.

I have a VP4 that the magneto has always given me trouble. One day we needed to use it and I had magneto problems so I borrowed the Mag off a VG4 and installed it. The engine started on two cylinders and with a little switching of plug wires with the engine running I had it hitting on all four. In the manual (somewhere) in says the Magneto from a VG4 will not work on a VP4. Or maybe it said Distributor. I would bet the VP4 is the odd fire, (That engine went obsolete in 1954), and the VG4 is even fire????

After Scott gets the fuel pump working the Carburetor will give him problems. That's my guess anyway.
 
Mag from odd fire should work on even fire engine. NOT the other way around. The difference is that there is no 2:1 reduction in the cap end of the mag.
I have never tried it, but that's my theory.
 
In the even fire V4 it has 2 pistons at TDC at the same time, like an inline 4. Mag is turning at crank speed. Spark will keep on coming back to one piston, but will never fire the running mate. That mag may have been on that engine, but by seeing the rusty cylinder & piston, he had never had it running. Maybe that is why it was abandoned, cause it didn't run right.
 
Yes, you are correct. My brain cramped up.
From his photo, it appears he does have the correct magneto.
I still can't figure out why that engine even has a magneto. Battery ignition was pretty much standard when his skids steer was built.
 

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