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H engine mod

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Ethan

09-30-2002 09:32:51




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Hey there green folks. I am an MM colector and have a very nice 39' model H that I like to pull in 2500 lb class. It is balanced well and pulls exellent. Only one problem. The model H tractors were not famous for their power. Has anyone built a good powerfull H engine for pulling? A-B-G pullers have any ideas? I need more than 12 h.p. I'm sure I could figure some things out, but just wondered if it has been done and how. Maybe if it had two more cylinders? I won't go there. Thanks for any help, my John Deere friends!

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HMan

10-01-2002 13:48:36




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 Re: H engine mod in reply to Ethan, 09-30-2002 09:32:51  
My $.02, If I were going to build an H to pull ,it would not be a 39. Hs pull off the cam and 39s have a very weak cam setup. It has tapered cam gear splines with a smaller nut than a 40up. The clutch hub is a fine straight spline, pityful design! A 1940 and up would be a better choice. At 1940 the cam was redesigned from gear to clutch. HMan



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Ethan

10-01-2002 16:32:38




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 Re: Re: H engine mod in reply to HMan, 10-01-2002 13:48:36  
Gee, I see why you are the H man. Thanks for the info. I don't know if I will ever actually do something with it, but it is nice to know of the design changes. Maybe just put some 1940 parts in it. It is one of the first ones built in 1939. Dad bought it w/ rebuilt engine and newer tires for $75. What a steal. Always dependable and cheap to run all day long. I get offers on it frequently. I have some more junk H parts so I'll just look them over and see what I got.

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Dwayne

10-01-2002 19:56:16




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 Re: Re: Re: H engine mod in reply to Ethan, 10-01-2002 16:32:38  
what is your serial number, if it is under 1100, it would not be wise to chop it up. low serial numbers are very desirable by collectors and are worth more with all the original parts.



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Ethan

10-02-2002 04:09:36




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 Re: Re: Re: Re: H engine mod in reply to Dwayne, 10-01-2002 19:56:16  
I know how low serial numbers are great. This is 3733. I think this means 2733 out of 9000 the first year. Probably not chop it up, but add some more power maybe some day. Weighs 2500 with me and a couple log chains on it. No lights, hydraulics, pto, or anything.



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Frank M.

10-01-2002 19:31:26




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 Re: Re: Re: H engine mod in reply to Ethan, 10-01-2002 16:32:38  
Ethan,
What's the serial number on yours? Mine is 3929.
You got a real steal for 75.00. You say you've got spare parts? Do you want to sell any? I still need some stuff for mine.
Catch ya' later
Frank M.



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Ethan

10-02-2002 04:14:26




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 Re: Re: Re: Re: H engine mod in reply to Frank M., 10-01-2002 19:31:26  
Number 3733. My parts consist of a tranny and bottom of an engine with maybe some other junk. Dad has them out in the weeds. Probably keep them. Nothing much good, exept I will check the year on the parts and see what they are. I think Dad has some cultivator and plow stuff somewhere. I'll have to see. I have alot of MM stuff and we all kinda share the H because hey, everyone needs a little bit of 2cyl power around.

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Dwayne

09-30-2002 19:24:21




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 Re: H engine mod in reply to Ethan, 09-30-2002 09:32:51  
there is alot you can do to an H. There is alot of room for oversized sleeves. a Larger carb off a A,B,G, high performance camshaft. port the valve chambers in the head, oversized valves, governor work for more rpm's. you can get nearly 40 hP out of an H if you want to spend enough money. But be careful, the whole tractor drives off the camshaft gear, that is the weak point. if you are going to really going to beef it up, you need a high performance cam and gear. The only place I know that makes them is Dengler Tractor in Middletown OH. But just remember that if you want to give it alot of horses, you need to have deep pockets!!!!! Good luck.

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Ethan

10-01-2002 12:03:58




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 Re: Re: H engine mod in reply to Dwayne, 09-30-2002 19:24:21  
Thanks for the help. I know the H has the potential of being a little monster. I heard of some guy spending thousands on B parts in an H. Ther are no power blocks for an H right? If there were, it would be funny, but useful to pullers. How about the compression release? H never had that. High compression could not be cranked without that. Hmmmmm. Ideas or examples? Thanks again for the info.

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Frank M.

09-30-2002 19:24:16




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 Re: H engine mod in reply to Ethan, 09-30-2002 09:32:51  
I'm glad you asked that. I'll be looking for your answers. I've got a '39 H too. I'd like to hook it to a sled once just to see what it'll do. I don't expect much though



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