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Champion Spark Plugs - RHM38E

Packaged Items
SingleBox of 12

Overview

In the early 1900s, small planes flew with single ignition systems powered by adapted automobile engines using Champion-brand automotive spark plugs. By the 1920s, the company had developed innovative spark plugs designed specifically for the aviation industry.

Champion Aerospace designs and manufactures Champion-brand piston-engine ignition components for both OEM and aftermarket for general aviation aircraft applications. Every spark plug manufactured has built-in design advantages that assure longer life and greater reliability.

A typical spark plug number with symbol explanation

1. Resistor None--No Resistor R--Mil-Spec. Resistor-Erosion protection
2. Barrel Style None -- Unshielded E -- Shielded 5/8"-24 Thread
H -- Shielded 3/4"-20 Thread (All Weather Plug)
3. Mounting Thread -- Reach -- Hex Size B-18mm 13/16" / 2.06cm 7/8" / 2.22cm M--18mm 1/2"/1.27cm 7/8"/2.22cm
L-14mm 1/2"/1.27cm 13/16/2.06cm U18mm 1-1/8"/2.85cm 13/16/2.06cm
J -- 14mm 3/8"/0.95cm 13/16/2.06cm
4. Heat Rating Position Low number--cold High number--hot
5. Electrode Design None-Conventional single E -- Two prong massive
N -- 4 prong massive
W -- Fine wire (Iridium) B --2 prong massive, Tangent to Center
P--Fine wire (Platinum)


* Shielded barrel thread size. Check barrel size - 5/8x24 or 3/4x20 threads before ordering and select proper plug number, See page 236 for Sparkplug Application Table.

** The "Iridium S" sparkplugs replace the Platinum and "W" Iridium types. Increased bore diameter improves scavenging action. Greater clearance volume can accept more combustion deposits. Single Iridium electrode offers greater resistance to lead attack. Easy to clean Easy to gap


NOTE:
Spark plugs are shipped in factory sealed plastic cases. Opened spark plug cases make the spark plugs non-returnable. Please do not open any spark plug until you are sure you have received the correct spark plugs for your application.
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Reviews

What a difference these made in starting engine!

Jamie G Verified Purchase

CHAMPION SPARK PLUG RHM38E (BOX OF 12)

December 1, 2022

Dnt A Verified Purchase

CHAMPION SPARK PLUG RHM38E

August 9, 2022

1978 Cessna 182RG. Lycoming O-540. Had fine wire plugs that began fouling almost constantly. 8 out of 10 flights (run-ups) would fail the mag check and would have to burn off for several minutes before passing the mag check. Swapped in these Champion massive electrode plugs and problem solved! Smooth as a sewing machine. :)

Horn A Verified Purchase

CHAMPION SPARK PLUG RHM38E (BOX OF 12)

August 3, 2022

Janis F Verified Purchase

CHAMPION SPARK PLUG RHM38E

August 3, 2022

Q&A

Please note, Pilotshop's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Pilotshop assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

Q: Do your new Champion RHM38E spark plugs come complete with washers?

Yes, each spark plug includes one copper crush gasket.

Q: What size are the replacement gaskets?

This uses 18 mm copper gaskets.

Q: What size plug socket is needed to remove and install the RHM38E?

7/8", something like our Part# 12-03771 would be perfect.