JD 70 pony motor

[mul-skiner]

Hello,is the pony motor on a JD 70 the same as the one on the 720,730,820etc.anyone have any idea if parts for this pony are easy enough to find Whats your opinion on the 70 for collecting reasons anyone? thanks m.s.

 

[Anonymous-0]

Same pony,ignition parts are readily available,but internals are hard to find and can be expensive.

 

[johndeeregene]

there is one difference on the pony motors. the early 70 pony had 2 different sized main journals. if i remember right the the journal on the transmission side is a bigger journal. that was changed in the late 70s an 720s. other then that the same. the guts of the motor you can get, but hold on to your wallet, they are not cheap.
johndeeregene

 

[Anonymous-0]

I've got an pony JD 830 and would go electric next time. Spent $3500 in parts to completely rebuild the pony. I've got an electric start JD 730 and could buy a lot of batteries for that money. Yes it is "neat" to have two engines, but you have all the problems associated with having two engines. The pony engine rods are some alumumin alloy and will eventually fail, so any pony engine tractor you buy this will be a questionable area. I believe they were $700/set from mother Deere eight or so years ago. No way would I install a used set. Perhaps someone is now making aftermarket ones. The JD 70 has shown a substantially lower increase in value as compared to the later 20 and 30 series tractors. This may change, but I wouldn't bet my money on it.

 

[Bill in Colo]

Have you ckecked the cost of a starter?

 

[Anonymous-0]

Last time I heard the 24 volt starter was around $800. However still a 6 volt starter on the pony and how many of these are available? Despite a ton of money in it, I seldom use the 830 beyond starting it up, therefore need to deal with the possibility of "sour" gas. The many comments about converting to 12 volt electric start and the availability of a kit to do this conversion, speaks volumes about the hassles and problems with pony engines. Personally I wouldn't do the conversion. Would just be certain to only consider electic start tractors.

 

[buickanddeere]

You do have to go 24V starter. A 12V unit is a tough go to make work anytime, in particular in any weather where a jacket or coat is required.
A plate steel bracket will allow a 42MT to be used which is a step up from the 40MT. The cast bracket doesn't have the room.
It's going to take a pair of group 31 batteries and 4/00 cable too.

Sad to say most of these dreams of a cheap, easy swap to electric. Turn out to be expensive half finished projects that get pull started.

We use airplane gas in the starting engines and it doesn't varnish, gum or get stinking. In fact any of todays pump gasoline keeps better than the stuff sold even into the 1990's.