What plugs for a 620?

tomstractorsandtoys · May 20, 2019

I have a neighbors 620 in the shop. A year ago someone dumped a jug of gas in it that was over two thirds water. Today I removed the fuel bowl assembly and pressure washed the tank. He wants a tune up done as well. What brand plugs do you recommend for a 620 that gets three hours use per year? He might haul half a dozen loads of manure with it and they have a church picnic each fall at the farm and they give a hay ride with it. Thanks Tom

John Deere D · May 20, 2019

Autolite 3116 non resistor

Use them in my JD 520......Case 610B....

Bob...

John T · May 21, 2019

If you go with a Resistor plug the Autolite 388 is a tad hotter then the 386. For light duty infrequent use especially if the engine is showing its age and exhibits some plug fouling, I like the hotter plug.

If you go with a Non Resistor 3116 is in the heat range of the two above.

What brand of spark plugs or oil is best can draw a ton of different opinions.

John T

James Howell · May 21, 2019

"[b:654c4848f0][i:654c4848f0]Autolite 3116 non resistor[/i:654c4848f0][/b:654c4848f0]"

Agree.

We use them on our Model 70s.

Mike M · May 21, 2019

I have used the autolite 388 for years without issues.

Randy G · May 21, 2019

I use AC C88L in my 2 cyl. Never an issue either

What plugs for a 620?

tomstractorsandtoys

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John Deere D

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John T

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James Howell

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Mike M

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Randy G

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