D-17 ignition question

Horvik · Jun 10, 2015

Hi;

What is s good spark plug for a used D-17 gas?

All the best

Bob Bancroft · Jun 10, 2015

I use about the hottest Autolite spark plug I can get in my old AC engines.

I believe the D17 started out with the short reach (3/8") plug, then switched to the long reach (3/4") plug. I suppose a search on AGCO parts might give a serial number break. You can tell by measuring the depth of the threads in the head. Most likely, they have not been mixed up, but you never know!

Kip-Utah · Jun 11, 2015

Early short reach plugs, I'd use autolite 303 or if you want a slightly hotter plug go with the tried & true autolite 295. I don't know what works best with the 3/4" reach plug heads.

DrAllis · Jun 12, 2015

AC Delco 45 XL or 45XLS for 3/4" reach plugs.

D-17 ignition question

Horvik

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Bob Bancroft

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Kip-Utah

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DrAllis

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