compression release on '36 John Deere BO

[macnbec]

I have a '36 John Deere BO that doesn't have compression release for the cylinders. I can only assume the cylinders were replaced with a block not equipted with a compression release. Any suggestions on how to repair this without a lot of hassles. I guess it would be better to ask, how can I fix this. There is too much compression to manualy turn the engine over.

 

[Fixingfarmer]

I believe compression relief came with stying. I know my 36 and 38 normal b tractors don’t have it. There was an engine increase in size at that time. I certainly wish mine had it. The Gs and A did

 

[macnbec]

I believe compression relief came with stying. I know my 36 and 38 normal b tractors don’t have it. There was an engine increase in size at that time. I certainly wish mine had it. The Gs and A did

thanks so much. I'm new to these tractors. just remember as a kid how neat they sounded. I didn't realize that the normal 'b' didnt have compression release.
There is a casting "boss" beside the sparkplug. I'm wondering if any one has ever drilled and tapped it and installed a compression release. If so, what are the pitfalls to be aware of.
thanks for your input.

 

[JIM MN]

Parts book, PC 676, not styled B-BR-BO tractors, shows using two AB1896R relief compression cocks on the BR-BO tractors block on tractors serial number 329000 and on, which is years 1939 on. Drilling and tapping is possible. It was talked about here on Yesterdays Tractors. Look into the achieves of Y-T. Makes soo much easier to start your tractor by hand?

 

[macnbec]

thanks for the info.
How would I find the thread where drilling and tapping was talked about?

 

[JIM MN]

You might try- Resources- at the top of this page. Then poke- Articles- under resources to see if there is anything there?

 

[Fixingfarmer]

This time of year it will begin to get much more difficult to start if not in a heated shed. I only have to start it twice from now till spring and pick a warm day to put the Christmas lights on then back off for a month. Trying to turn that cold oil your reliefs will help some but it still can be tough. Half throttle. Rotate it backwards till compression is felt then back forward. Don’t rotate backwards past the mag trip. This will fill one cylinder with a bit of fuel. Then back forward. In mid summer it usually starts once it has compression on that cylinder that got filled so turn 2. When cold it can take half choke and some ether (be incredibly careful where your hands are at if ether is added release that flywheel don’t hold your fingers tight trying to bear it over if the pop happens let it go ether is added AFTER REVERSE ROLL everything is sitting still into the inlet pipe at the top only it can pop in reverse if not careful) and some struggle. They all will have their own slightly different process you will get the hang of it. Keeping your carb clean and in good condition with good gaskets is much easier on your back than with most other tractors

 

[JD Dave]

Complimemts to Fixing. That's exactly how I start my AOS.

 

[flying belgian]

I have a '36 John Deere BO that doesn't have compression release for the cylinders. I can only assume the cylinders were replaced with a block not equipted with a compression release. Any suggestions on how to repair this without a lot of hassles. I guess it would be better to ask, how can I fix this. There is too much compression to manualy turn the engine over.

Our 36 B did not have petcocks. Had it on the manure spreader all winter , started most every Sat. Cold weather or colder weather. I don't remember it being to hard to roll over in the cold.