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Does anybody use the primer cups?

A

Anonymous-0

Well-known Member
I bought an operators manual for my Regular online from Fordson House, great reading that old plain spoken wording, instead of the arrogant engineer speak that is so common now ! My favorite phrase in the book is "never take a chance on unskilled labor tinkering on your magneto", lol, Sound advice ! Anyway, it talks about using the primer cups for starting, any of you guys ever use them ? Thanks ~ Mike
 
I personally don't use them and never seen the need to. If the tractors are running correctly they always start on the first or second crank anyway. I actually seal mine with silicone so I know for sure there will never be a vacuum leak there. I have actually seen guys put pipe plugs in the head and seal the holes in the valve cover to eliminate issues. Have fun.
 
Mike, The cup's were used if you had a kerocene tractor and you stalled or had shut the tractor down when on kerocene. You would put some gas into cup's to get the tractor started. I have used them on first start up's to prime the cylinders. It is easyer than pulling out 4 plugs and squirting gas in. oldiron29
 
I guess the only time I have actually used them was right after rebuild on first start up or maybe a few times afterward until it frees up a bit. But I like to leave them on , for looks , as long as they seal good.
 
I can remember Dad had a flat "Fifth" bottle with gas in it that he would sometimes use to start one of our F-20s.
 
One winter in 68/69 early in the morning neighbor came up. It was wintertime on a Sat morning round 7 00. Wanted to know if I could pull him out. There was around a foot of snow on the ground, and it had got down round one side or the other of 20 below. I finished breakfast and went out and tried to start her up like always. No go. I put some gas in the primer cups, and she did start. I had 2 log chains. I wrapped them 1 each around each rear tire and went out. Got in front of him. He didnt have a log chain. I took one off and he hooked it to his car, and I hooked the other side as near to the left wheel as he had ran of the L side. I took up the slack by trying to cut across and when tight I hit the R brake in bits and with him trying we got it out. Put the chain back on the R wheel and came on home. It was a F-20 with foot brakes.
 
Over 40 years ago when i overhaulled my F-20 we ran it in with a M and a twisted belt pully to pully.After a short run in when i turned the gass on the 20 it ran like crap! I had forgotten to tighten the primers down!! Now i have priming cup spark plugs in mt 1914 Model T Ford.Bud.
 
As you can see by my name that I am not into John Deere"s, but we had a D we used to pull our Saw Mill with and it was just about impossible to start cold without using the primer cups and also they relieved a little Compression. Ed
 
Thanks for all the stories ,info and replies ! I can see where a vacuum leak there could cause some troubles . I have never used them either , and was curious about their intent . In very cold weather it would be an advantage I imagine. For my old girl, it will only see sunny day use from here on out, like most of these old timers I suppose. They are fun though ! ~ Mike
 
The early JD "D" didnt have a choke so needed primer cups on the petcocks to start unless the engine was warm
 
Hi Guys. I apologize for being so late on this primer cup question. Yes, I always use primer cups. I have a couple of early John Deere Model "D"s. These tractors have an extreme amount of compression. They have 501 cubic inches, Two cylinders. This makes them very touchy especially on hot days,when using the choke. I carry a small squirt bottle of gasoline. I squirt the primers about half full as the gas is running into the cylinders, turn the flywheel on to compression and their running.
Thanks, Kobe
 
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