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WD spark plug type
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Fog1950 View Drop Down
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Joined: 30 Mar 2019
Location: Michigan
Points: 4 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Fog1950 Quote  Post ReplyReply Direct Link To This Post Topic: WD spark plug type
    Posted: 30 Mar 2019 at 5:05pm
Hi guys, just did a valve job on my '51 WD. It has Autolite 295's in it now. Curious about the spark plug length into the cylinder. Looks like the recommended plug is shorter than it should be. Has anybody in the group used a long shank plug in their WD? How has it worked?
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acd17toy View Drop Down
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Joined: 11 Sep 2009
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Points: 721 		Post Options Post Options   Thanks (0) Thanks(0)   Quote acd17toy Quote  Post ReplyReply Direct Link To This Post Posted: 30 Mar 2019 at 7:08pm

  The short spark plug is the correct one for your tractor.
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DrAllis View Drop Down
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Joined: 12 Sep 2009
Points: 21909 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 30 Mar 2019 at 7:41pm
Late WD's had the taller WD-45/D17 style cylinder head on them from the factory and they would use 3/8" spark plugs. BUT, if the tractor ever had a NEW cylinder head installed on it after about 1960, it just might require the longer 3/4" long spark plugs. You've gotta know what your looking at.
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DougS View Drop Down
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Points: 2490 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DougS Quote  Post ReplyReply Direct Link To This Post Posted: 30 Mar 2019 at 7:45pm
The edge of the spark plug thread should be flush with the inside top of the chamber in the cylinder head.
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Points: 4 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Fog1950 Quote  Post ReplyReply Direct Link To This Post Posted: 30 Mar 2019 at 8:26pm
Thanks for all the comments. I appreciate your knowledge.
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