gabmuks

Thank you all for replies.

I checked all three plugs with a ohmmeter,

All read zero ohms. I then measured the resistance

of a 60 watt light bulb to see if the ohmmeter was working.

The lightbulb measured 19.2 ohms.

I then took a new glow plug from a different engine

and again measured zero ohms.

Then I connected each of the old glow plugs directly to a 12v battery

for about 10 seconds. Each one glowed red.

Then connected new glow plug. It also glowed red.

So can I correctly conclude that the plugs are still usable?

I wish that I had a meter that could measure the current while

an old plug is glowing and compare to a new plug.

But my meter only goes to 10 amps.

I know that the 20 amp fuse in the tractor would blow.

And that replacing with a 30 amp fuse would start to melt the fuse block.

So I am thinking that the 40 amp relay circuit posted by RichWaugh

is the best solution.

I have Lai Dong 3 cyl. engine I think.

KM385BT maybe? I'm writing from memory.

Can't find info.

Thanks Tinbender

Ended up somewhere between 4 and 5 quarts

before it showed on the stick.

Will check it again tomorrow.

I wouldn't mind having the valves ground professionally, except for the fact that I've

been unemployed for almost a year now. I've never been able to collect unemployment so I have no income at all. Fortunately my wife still has her job.

Besides, I have lots of free time and their's plenty of stuff around here that needs to be done. I don't know bout you guys, but it seems to me the work to be done on the house, the out-buildings, the equipment repair/maintenance, the gardening etc., is a full time job by itself. Once I get the tractor back together and the fel back on, I have to move some rocks and ground from the west side of the house. Wife wants another patio door put in that side like I just finished doing on the east.