Tempest UREM37BY

[freightpilot27]

Anyone using 37BY plugs in the A-65 or A-75?
I know they worked wonders eliminating plug fouling in my O-300 powered 172. But unsure about the lower compression continentals.
They ARE approved for the A-65 through O-300. Don't know about others though.

Thanks,

[Ray36048]

Re: Tempest UREM37BY

It looks like yes for Champion REM37BY. The Tempest chart show differences depending on engine model for the UREM37BY.

I have aCherokee 180 that I switched from Champions to Tempest. I think the Tempest are a better plug. You may need to buy a new spark plug socket for the Tempest. They require an "extra deep" socket due to the smaller wrenching area.Tempest Plugs.pdf

[astjp2]

Re: Tempest UREM37BY

I have them in the top, back when they were autolites. Tim

[Ray36048]

Re: Tempest UREM37BY

Do they clear the cowling without bumps?

[astjp2]

Re: Tempest UREM37BY

They did for me. Tim

[flyguy]

Re: Tempest UREM37BY

Tim,
What kind of terminals are you using at the plug end with the 37's. I have cups now and am not real happy with them. Would like to try 37's.
Darryl

[astjp2]

Re: Tempest UREM37BY

I used just straight fittings and my upper cowling is custom fit to clear. It worked real good with the new slick harness. Tim