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| Which spark plug to use? '93 50hp Ev... |
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Brandon Link
Member
Username: blink3477
Post Number: 12
Registered: 05-2007
| | Posted on Tuesday, July 14, 2009 - 09:10 pm: | 
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My manual says QL78C and the Champion chart says QL78YC.
What does the "Y" stand for? I've run them both and don't notice a difference.
Also, my manual states that I should use QL16V surface gap plug if operated at sustained high speed.
Since this is a jet outboard and I drive it like I stole it, should I be running these instead?
Thanks. |
Morten Ringvold
Senior Member
Username: haffiman37
Post Number: 3939
Registered: 04-2006
| | Posted on Tuesday, July 14, 2009 - 09:27 pm: |
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The YC plug has an extended center electrode that gives an improved idle.
In Your case,(newly stolen), try the QL16V plug. |
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