RTI spark plugs

Mark Poss · Nov 1, 2023

Can someone please tell me what autolite spark plugs to use in a RTI? It has a magneto not a distributor if
that makes a difference. Thanks, Mark

J Hamilton · Nov 1, 2023

Autolite 437

Mark Poss · Nov 1, 2023

Thank you

Roger Roemen · Nov 14, 2023

(quoted from post at 16:42:32 11/01/23) Can someone please tell me what autolite spark plugs to use in a RTI? It has a magneto not a distributor if
that makes a difference. Thanks, Mark

have an rtu with a mag. I use autolite 295, it is a little hotter plug than the the 437.

J Hamilton · Nov 14, 2023

The 437 is hotter than a 295. The last number indicates the heat range. The higher number is a hotter plug.

Roger Roemen · Nov 17, 2023

I don't want to start an argument. I am just going by what my parts person showed me.

J.Wondergem · Nov 18, 2023

(reply to post at 11:42:32 11/01/23)

Here's what I just read on Autolite site:

Again using our Autolite numbering system, we find that the last number designates the relative heat range within a spark plug family. Within the 10x family of plugs, 103 is colder than 104 and 106 is hotter than 104.

Roger Roemen · Nov 19, 2023

(reply to post at 16:55:35 11/18/23)

akes sense. No argument from me

RTI spark plugs

Mark Poss

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J Hamilton

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Mark Poss

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Roger Roemen

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J Hamilton

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Roger Roemen

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J.Wondergem

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Roger Roemen

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