Farm Equipment - d-17 spark plug number and brand

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d-17 spark plug number and brand

Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=188054
Printed Date: 24 Sep 2025 at 1:32am
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Topic: d-17 spark plug number and brand

Posted By: nickia
Subject: d-17 spark plug number and brand
Date Posted: 04 May 2022 at 6:16pm

can any one tell me if the spark plugs used on the d-17 is the same for all the series? i have a 58 and the plugs are short and i think on dads series 4 the were the longer ones?

Replies:

Posted By: JoeM(GA)
Date Posted: 04 May 2022 at 7:25pm

The autolite 295 is the short 3/8" reach plug for early 17’s, Autolte 405 with the 3/4” reach is for the later ones

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Allis Express North Georgia
41 WC,48 UC Cane,7-G's,
Ford 345C TLB

Posted By: DrAllis
Date Posted: 04 May 2022 at 7:55pm

The change was made at chassis s/n 24001 and up I think. But, many older tractors may have had a head replaced at some time in the past and then would have the newer style head, required the longer plugs.

Posted By: nickia
Date Posted: 04 May 2022 at 9:11pm

thank you