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0-320 D2J 160 HP What Plugs to use?

Spark plugs for O-320 160 HP.

Champion REM40E massive electrode .016 - .021 thousands of an inch. Use new copper crush washers on plugs & anti-cease on threads; not first 2 threads.
TEMPEST Spark Plugs. 5/8" x 24. UREM38S Fine wire Iridium electrode gap at .016-.021 thousands.
 
If you are running avgas, I would recommend REM37BY. They better tolerate the lead.

Oops, Stan types faster the me.
 
In our piston Belll 47 helicopters Tempest get 500 hrs or a little better Champion close to 300hrs.
600hrs a yr for the last 4 yrs its been consistent between the two.
 
As others have said, use the UREM37BY plugs if you use 100LL fuel AND have 5/8" spark plug wires. If your ignition harness is the 3/4" all weather plug wires, then UHEM37BY would be necessary but I am thinking that is not an option or not available.


championplugrating.jpg
 
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