Farm Equipment - D-14 spark plugs

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D-14 spark plugs

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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=42272
Printed Date: 29 Aug 2025 at 4:03am
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Topic: D-14 spark plugs

Posted By: Herb(GA)
Subject: D-14 spark plugs
Date Posted: 17 Dec 2011 at 11:49am

My D-14 will get 100+ hours moderate use this next year. The present spark plugs need replaced; what are todays recommendations; what mfger? and what heat?

TIA, Herb

Replies:

Posted By: Jeff Z. NY
Date Posted: 17 Dec 2011 at 11:56am

I use Autolite #303.
Engine runs fine with them.

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I Love Meatballs and Dumplings on Toast with Gravy and Rosemary and ??? {Open For Suggestions}

Posted By: D16Allis
Date Posted: 17 Dec 2011 at 12:37pm

I have had some trouble with the plugs not fitting tight enough, and some oil/ blow by coming out.

Posted By: GregLawlerMinn
Date Posted: 17 Dec 2011 at 12:53pm

Autolite 295 or 303

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What this country needs is more unemployed politicians-and lawyers.
Currently have: 1 D14 and a D15S2.
With new owners: 2Bs,9CAs,1WD,2 D12s,5D14s,3D15S2s, 2D17SIVs,D17D,1D19D;1 Unstyled WC

Posted By: Bill Long
Date Posted: 17 Dec 2011 at 2:50pm

Herb, When we sold them we LOVED the AC plugs. However, that was almost 50 years ago. TODAY, Auto Light seems to be the plug.
Good Luck!
Bill Long

Posted By: DSeries4
Date Posted: 17 Dec 2011 at 11:40pm

I have Autolite 295 in mine. Work good.

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'49 G, '54 WD45, '55 CA, '56 WD45D, '57 WD45, '58 D14, '59 D14, '60 D14, '63 D15D, '66 D15II, '66 D21II, '67 D17IV, '67 D17IVD, '67 190XTD, '73 620, '76 185, '77 175, '84 8030, '85 6080