Le Roi 4-Cylinder Engine Spark Plug Gap

Gronewold · Apr 18, 2016

My boss has a Le Roi 4-cylinder engine on a Clyde Iron Works double drum winch, and we need to change the spark plugs. Does anyone have an idea as to what the gap needs to be?

Paul from MI · Apr 18, 2016

If it's a magneto or conventional battery ignition .035" won't be too far off. Those old engines aren't real fussy.

Gronewold · Apr 18, 2016

Thanks a lot - we'll give that a try.

teddy52food · Apr 18, 2016

.025 for a magneto.

Gronewold · Apr 18, 2016

Thanks, this is a battery start so does that change your guidance?

old · Apr 18, 2016

The most common gap for most of the older engines is 0.025.

Gronewold · Apr 18, 2016

Sure do appreciate all the input.

Le Roi 4-Cylinder Engine Spark Plug Gap

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Paul from MI

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