2003 175hp Johnson Looper plug?

mboy

Seaman
Joined
Oct 16, 2007
Messages
57
What is the different e running Champion QL82YC vs QL8YC in this engine?

I believe it says to run the QL78YC, but I have some QL82YC and was wondering if their is an issue running them on this motor.

i believe my marina (where I purchase 80% of my fuel) has 89 octane.

Very little trolling, mostly 3800 rpm cruising.

Thanks.
 

mboy

Seaman
Joined
Oct 16, 2007
Messages
57
Re: 2003 175hp Johnson Looper plug?

BUMP for the safety of using QL82YC in my 2003 175hp 2-Stroke V6 looper?
 

angus63

Captain
Joined
May 20, 2002
Messages
3,726
Re: 2003 175hp Johnson Looper plug?

I use QL78YC in my oceanpro (it's latest recommendation from OMC). Originally called for QL77JC which I'm told run a bit cooler. I would assume the QL82YC would run a bit hotter. In my opinion I would avoid anything that raises combustion temps above factory recommendation.
OMC recommends 87 octane fuel. You are using fuel that burns slower with a plug that is hotter than recommended. Not sure of the affect, but why chance it?
Good luck
 
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