Reply With QuoteLow speed would probably be a hotter plug, whatever you do make sure it's champion, that engine was built around the plug.
Plugs between brands cross reference like propellers...poorly.
cheers fnq
My manual (Johnson 1989 HP) states I can choose between a "low speed sustained" type plug or a "high speed sustained" type plug.
Which one should I chooose?
My max speed would be around 55 - 60km / hr for around 20 mins max.
Splash
Low speed would probably be a hotter plug, whatever you do make sure it's champion, that engine was built around the plug.
Plugs between brands cross reference like propellers...poorly.
cheers fnq
Here ya go.. Handy for some of us
Garry
Retired Honda Master Tech
thanks boys.
which one should i go for (low speed or high speed)?
pros / cons for each?
sk - great chart!
Splash
thanks boys.
which one should i go for (low speed or high speed)?
pros / cons for each?
sk - great chart!
btw - as plugs are always wet, how do know when plugs need to replaced?
Splash
High speed is probably the standard plug, standard plug is fine, if you notice a problem go the hotter one. Your engine is not new, it's an individual now so there is no strictly right or wrong until you notice a symptom, if you know what I mean.
If your plug oils up or the engine is real rough at trolling speed then the hotter may suit you better - it's a crap shoot, most notice a +ve difference from only replacing oldish plugs so it's hard to compare a new type/style/brand of plug against the old.
cheers fnq
thanks fnq - the plugs do oil up consistently - so, i'll go for the hotter ones.
Splash
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