MM UBLP

There are a few things they are VERY PARTICULAR about always start cranking them
at IDLE if they don't start right up then open the throttle slowly. Another thing there
should be a resister in the electrical line at the coil on your tractor (some have a resiter
wire) when it is cold you will have to bypass the resister to start it but don't leave it
bypassed or you'll burn your points up. We bypass the resister until the tractor will run
without it bypassed. The biggest problem we have is distributor caps cracking or getting
wet. Try to cover the cap to keep it dry. A block heater will help lots! Also parking
where the wind can't get to them as easily helps (wind chill affect more than just you.)

Just remember always hot or cold start cranking at IDLE (they are very particular about
that.) You may have to bypass the resister to increase the fire. If your tractor doesn't
start or misses and or backfires get a new distributor cap we have even had troubles with
brand new ones on the MM and the 428 Ford power units we have normally it's the cap
even if it is dead on just one cylinder the cap is more often the problem than a spark plug.

Another thing use LP oil it is a low ash oil. We use 10W-30 in the winter time so they
crank easier. NOTE: try to pull it in the summer with LP oil so you don't get the ash
buildup in the combustion chamber you'll know when you do because the ash buildup will
cause preignition.

If you have any questions feel free to e-mail me.

jfiorelli@hotmail.com or fiorelli@cscu.csc.edu

Jeremy Fiorelli

• Jeremy Fiorelli's MM and TC tractor and pulling page.

LP burns cleaner, and therefore the engine stays cleaner. If you pull a head off an LP engine, they are usually quite clean, compared to gas. I have an LP engine in a U that was switched to gas to make more pwer for pulling. The LP heads run higher compression, and therefore make more power. There are several people who use LP gas in Molines for pulling as well.

We ran an Lp G1000 for a number of years with good results. When they won't start it was harder to tell what was wrong. Too much fuel, not enough, ignition wet-same as gasoline. They start on vapor and then for maxium power you switch to liquid through the hot coolant vaporizer. When you shut them off it works best to switch back to vapor and then even run them out of fuel to make sure there is no liquid lp in the system when you start it again. Many lp engines ran thousands of hours and when they were overhauled they put back standard bearings because there was so little wear.
After we put in some new parts in the fuel system it would start at very cold temps with no coolant heater but that is not always the case.

LP is great. The engines stay clean. The oil does not get dirty like with gas or diesel. The oil still must be changed other wise is gets like grease. The only problem is that LP has trouble starting below 10 to 20 degrees fahrenheit. If you are going to use it as a work tractor at that temp. put a block heater on it. Ordinarily if you have trouble it is in the ignition system.