YM336D Block Heater

[R Barger]

I am considering adding a block heater to my 336. Has anyone had any bad experience with removing the threaded plug behind the starter. Since it's been 25 yrs since it was built I didn't want to create myself a problem.

 

[kenmac]

I haven't.. If it's too cold to start the yanmar,, it's too cold for me to be on it

 

[R Barger]

I haven't.. If it's too cold to start the yanmar,, it's too cold for me to be on it

I've got cows to feed all winter. i'm sure the yanmar will start without the heater but it would be much easier on it.

 

[winston1]

Not sure yours has the 1/2" square socket. If so, my reading on it indicates it sometimes bends a breakover with a cheater pipe on it. Leanord Sheafer (parts business) recommended loosening the plug before purchasing the heater.

 

[R Barger]

Not sure yours has the 1/2" square socket. If so, my reading on it indicates it sometimes bends a breakover with a cheater pipe on it. Leanord Sheafer (parts business) recommended loosening the plug before purchasing the heater.

I thought about removing all the paint I could then soaking it with penetrating oil for a while before trying it.I think your right on the 1/2".

 

[kenmac]

If it appears it will not come out or about to break.. You can always use a heat lamp close to the block.. That's what some guys I know use.

 

[winston1]

I thought about removing all the paint I could then soaking it with penetrating oil for a while before trying it.I think your right on the 1/2".

Penetrating oil is of little value on pipe threads. They are liquid tight.

 

[R Barger]

I may try to remove the plug tomorrow before I order a heater. I have a few of the tank type heaters but not sure how good one of them would work.The only place I could hook one up would be to the block drain and that hose might not be large enough to allow the heater to work.

 

[Andy in Gap]

I installed a block heater a few months back on my 187d and had the same concerns as you...I had read about how impossible to remove the plugs could be. Bought some good extensions and an SK breaker bar. The plug turned out as easy as if someone had done it the day before. YMMV but I wouldn't be afraid of it before you try. Just make sure the extension is fully seated in the plug so you don't round it out.

 

[Andy in Gap]

Also, I should have installed a block heater years ago. The improvement in cold weather starting is pretty amazing. It's like hopping on a pre warmed tractor when it's been plugged in.