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Re: 39 a engine

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Author  [Modern View]

04-10-2014 10:17:09

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the crank will need to come out and be turned. it looks like the new style rods are shorter, the piston pin hole is lower on the skirt. the way i see it, the pistons and rods both need changed

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buck eey al

04-10-2014 15:58:16

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 Re: 39 a engine in reply to kabat, 04-10-2014 10:17:09  
GTX is right. If you put gas pistons & all fuel pistons side by side they're the same height.

The piston pin holes however will be in different places!

Gas & all fuel connecting rods are the same but when pistons are attached to 'em, the distance from the center of the crank pin to the piston face is greater on a gas than an all fuel giving it higher compression.

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04-10-2014 18:12:30

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 Re: 39 a engine in reply to buck eey al, 04-10-2014 15:58:16  
so when i order parts do i need gas or all fuel pistons i really dont know what tractor i have

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buck eye al

04-14-2014 15:24:24

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 Re: 39 a engine in reply to kabat, 04-10-2014 18:12:30  
Mostly just your call. Gas pistons made of aluminum will make it much snappier. It will then be a gasoline only tractor. If you go original with all fuel iron pistons it won't have as much HP and will be able to burn most any petroleum product that will flow through the system long as your shutter still works. Sometimes they're easier to get to idle smoothly with gas pistons than with all fuel.

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04-10-2014 10:49:40

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 Re: 39 a engine in reply to kabat, 04-10-2014 10:17:09  
Rods are the same length, the pin is moved in the piston to raise compression. Aluminum pistons are a huge plus.

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