2501 W. Market St., York, Pa. 17404.
Here are some tips on valve timing and magneto setting for collectors who have very little experience with these old Rumelys. If an Oil pull has the old Du4 American Bosch mag on, be sure it is safe and has a good winding and a good impulse. You could be killed 'out-right' with a bad impulse on an old Du4 or a Du2. You can replace these with the new MFR or a MJA-c American Bosch magneto. I was at a show in the summer and I had to get around the Oil Pulls because I like to hear them run. But here they were cranking away and one man said he was ready to give up. I walked over to him and told him who I was. 'Boy,' he said, 'I am sure glad you are here. We never had one but I like the engine 0. K., and would give anything to get it started.' I said, 'Do you have spark?' He said, 'What is that?' I said, 'You have to have real good spark if you are going to start this engine--with that kind of compression.' I looked and that magneto must have been in water for ten years. Everything was in a bad state. So when you see these fellows cranking at a good old Oil Pull, don't down it too quick. It could be something very simple.
Now, for valve timing, here is how to check the timing. Turn compression relief hand lever down to the running position. Then turn the flywheel until the exhaust valve of no. 1 cylinder (left hand) has closed and the pointed coincides with the flywheel mark 1XC. Loosen the locknut on the adjusting screw on the top of the rocker arm and make the necessary adjustments with a screwdriver. Adjust until there is very little lost motion between the lower end of the Rocker arm and the valve stem. A good way to determine this is to insert a piece of paper between the lower end of the Rocker arm and the valve stem. While sliding the paper back and forth, adjust the adjusting screw until the paper just commences to pinch. Then move the flywheel to the next marking 110 and adjust the intake valve in the same manner.
Now here is one for you new guys. This adjustment should be made when the engine is cold. To take care of the expansion in the cylinders when the engine is warm, more clearance should be allowed. Next, revolve the flywheel one revolution and repeat the adjustment as given above for number 2 cylinder with 2Xc and the 210 markings. Now there is no other way to set Oil Pull valves. With a little compression and a good magneto and the valve setting as prescribed above, these old Rumelys will start 45° below 0 or 105° in the shade.
There is one other thing to remember: never put an impulse on with less than 35 degree lag angle. Set your mag on the tractor to click off on DC, and DC only! With a 35 degree impulse you are ready to go. The old Rumely men know all this, and more besides. But for you young collectors and boys just attending shows I'll be glad to give you all the information you need, Just Write Me:
I think all us old Rumely collectors and owners of Rumely Oil Pulls should really congratulate Earl Marhanka of Dowagiac, Mich, for getting together all the OilPulls and showing them in La-Porte to all the old Rumely employees last July 4. That is one of the greatest endeavors a man could take on himself. Also the same goes for Rumely Bill Krumwiede, Voltaire, North Dakota. Well, I could go on and on, but I will sign off.