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44 Farmall H engine questions

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Chad from Michi

08-08-2005 04:16:17

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Ok Our 44 H got a doner engine a year or so ago from another 44 H. paid $150.00 and it has ran but I can never seem to get to run good. The Tractor misses all the time.
We have put new plugs, wires, cap, rotor cap, points, condensor, different coil, rebuilt the carb and it still misses. some times it will run good and other times you can here it popping like it wants to run good. I thought maybe it was the valves so we adjusted them a dozen time and it never really helped. So over the weekend I bought a compression tester to find out if I had the valves adjusted wrong or the rings were shot. Well This is what I got #1 90, #2 91, #3 90, #4 91
so with that being said I figured that with it being a disilate head 90 PSI in the cylinders was good? what is the compression suppose to be anyway? I have checked the timing a few times and I think I got it but what is causing my engine to miss? Is it a fuel related problem? Could I have a intake manifold gasket leak? any suggestions would be great!
Thanks
Chad Penny

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Paul in Mich

08-09-2005 07:19:23

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Re: 44 Farmall H engine questions in reply to Chad from Michigan, 08-08-2005 04:16:17

Chad, I"ve been following this thread, and have run into the same situation as you, and found the probblem to be a bad distributor or magneto cap. Believe it or not, some of them are bad when new, and may cause a miss. You might try borrowing the cap from your H and trying that which will tell you if it is the cap or not. Beyond that, I would check the gap in your points and make sure they are set right and make sure there are no wires grounding out on the distributor. Doing this may not tell you what the problem is, but it may eliminate or pinpoint something very simple. Someone mentioned fuel. It could be a fuel problem if the missing is random and not happening on just one cylinder, but if it is happening on just one cylinder, then that would eliminate fuel as your problem. As others have suggested, it could come down to bad bushings in your distributor but that is easy to diagnose by feel. The saving grace with these situations is that short of bad valves, it comes down to ignition or fuel, which requires mostly patience to properly diagnose.

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TDK

08-08-2005 19:39:29

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Re: 44 Farmall H engine questions in reply to Chad from Michigan, 08-08-2005 04:16:17

The "H" with distillate head was rated for 95 lbs. compression when new.

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Chad from Michigan

08-09-2005 04:19:11

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Re: 44 Farmall H engine questions in reply to TDK, 08-08-2005 19:39:29

wel lI will not complian that there are 90 psi then being we bought a used engine and have run it for 2 years just can not get it to run "great" you know.

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Dave_Id

08-08-2005 11:46:31

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Re: 44 Farmall H engine questions in reply to Chad from Michigan, 08-08-2005 04:16:17

You replaced the plugs, but one of your new plugs may be bad. It wouldn't be the first time bad plugs were purchased new.. If one especially is fouling, replace it. Did you replace the plug wires with copper ones, or did you use graphite??

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Chad from Michigan

08-09-2005 04:20:20

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Re: 44 Farmall H engine questions in reply to Dave_Id, 08-08-2005 11:46:31

we used the copper core plug wires and have used several sets of plugs.

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EricB

08-08-2005 09:00:27

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Re: 44 Farmall H engine questions in reply to Chad from Michigan, 08-08-2005 04:16:17

Personnally I think 90 psi is a bit low. But not unusable. All 4 seem nicely balanced. Try a wet/dry compresion to see if its losing at the rings or at the valves. It sounds like valves to me but then I didn't hear it. Pull a plug and see if your getting a nice clean spark.
If you have lots of fuel and good spark then the problem is probably in the values/timing etc. Borrow or beg a timing light.

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Andy Martin

08-08-2005 09:34:15

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Re: 44 Farmall H engine questions in reply to EricB, 08-08-2005 09:00:27

What do we do with a timing light?

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riverbend

08-08-2005 19:48:08

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Re: 44 Farmall H engine questions in reply to Andy Martin, 08-08-2005 09:34:15

I use an inductive timing light to look for bad plug wires or to 'see' what is happening with the spark side of the ignition.

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Glenn in Michigan

08-08-2005 07:35:18

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Re: 44 Farmall H engine questions in reply to Chad from Michigan, 08-08-2005 04:16:17

I bought a '49 H last spring and after re-doing the carb, plugs, wires, points and all, it would run but like what you are describing. It turned out to be a original fabric covered wire in the starting system..I thought it was valves. Wire changed, runs like a top. Check your wires, you may have a grounding problem.

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Chad from Michigan

08-09-2005 04:22:08

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Re: 44 Farmall H engine questions in reply to Glenn in Michigan, 08-08-2005 07:35:18

I rewired the whole tractor not an original wife on it. I know it is wireded right because I made 2 harneses and used one on our 1948 H and it runs like a champ.

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Dellbertt

08-08-2005 06:51:27

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Re: 44 Farmall H engine questions in reply to Chad from Michigan, 08-08-2005 04:16:17

Drain the fuel, remove the sediment bowl and clean the tank. Blow out all the junk. Clean the sediment bowl. Install a screen in the top of the sediment bowl where it goes into the tank. That should eliminate any fuel supply issue. Make sure the float in the carb is not sticking and is adjusted. Make sure the plug wires are installed properly. I think the sediment bowl screen will do the trick.

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Janicholson

08-08-2005 05:45:17

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Re: 44 Farmall H engine questions in reply to Chad from Michigan, 08-08-2005 04:16:17

With what's been said, I'd do the following:
1) Using insulated spark plug wire pliers, pull plug wires off and put them back on one at a time till you determine which cylinder it is.
2) Listen with a piece of small diameter rubber hose (1/4"I.D.) around the intake area/manafold to hear the hiss of a vacuum leak.
3) Check the distributor bushings. If the rotor shaft can be wiggled in any direction more than .003" the bushings need to be replaced.
4) Do a cylinder leakdown test on the suspected cylinder (described in archives)
Good luck, it should be identifiable.
Jim Nicholson

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Randy SE-MN

08-08-2005 05:09:30

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Re: 44 Farmall H engine questions in reply to Chad from Michigan, 08-08-2005 04:16:17

Alot of folks adjust their points to the magneto setting of .013 instead if the distributor setting of .020, and have serious performance problems.

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Chad from Michigan

08-08-2005 05:23:12

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Re: 44 Farmall H engine questions in reply to Randy SE-MN, 08-08-2005 05:09:30

I will look at the points. I used the feeler gauge that was sent with the points and never thought anything about it but I think it did say .013" But then again that could be from my cub or my dads A I forget what I have done after a while but I will look tonight!
Chad

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Nebraska Cowman

08-08-2005 04:31:46

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Re: 44 Farmall H engine questions in reply to Chad from Michigan, 08-08-2005 04:16:17

I fought an H with a miss until a better mechanic than I discovered we had the wrong points in it. The rubbing block was backwards. But anyway we changed the head and put new rings in it which it needed anyway so all was not lost!

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