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Author Topic:   Sparkplugs
Barry posted 09-28-2000 08:38 PM ET (US)   Profile for Barry   Send Email to Barry  
Any thoughts on brands and types of sparkplugs? I want to pick up a spare set for my '94 Merc 90. The engine currently has NGK BUHW-2, surface discharge (no gap), plugs. I have seen SplitFires advertised in several catalogs. Are these any good? If I get them any idea where to get specs on how to gap them. I couldn't find anything in the Merc manual.


Lil Whaler Lover posted 09-28-2000 08:46 PM ET (US)     Profile for Lil Whaler Lover  Send Email to Lil Whaler Lover     
Barry, Mess with the spark plugs if you must BUT realize that you will not gain anything from changing from the factory recommended plugs, and it is likely to cost you real $$$$$ when you get done. Before you even remotely consider using Splitfires go to the forum at and read the current posting there on Splitfire plugs for marine usage or any 2-cycle usage for that matter. JUst my opinion but a kinda strong one. Dave
dgp posted 09-28-2000 10:50 PM ET (US)     Profile for dgp  Send Email to dgp     
If Splitfires were the miracle plugs that they, Splitfire, claims them to be every engine mfr would be installing them at the factory. I read some independent dyno tests on a Harley and they actually decreased performance. Stay with the factory recommended brand and part number,
unless you need a resistor plug to eliminate EMI / RFI that causes your electronics to go haywire. I've used Champion SS Marine plugs successfully to combat this problem. Don
Clark Roberts posted 09-29-2000 08:13 AM ET (US)     Profile for Clark Roberts  Send Email to Clark Roberts     
"Ditto" to all the above advice! The Old Man and the Sea
triblet posted 09-29-2000 10:02 AM ET (US)     Profile for triblet  Send Email to triblet     
I second that if Splitfires were a miracle
plug, they'd come from the factory. Those
who claim a big performance boost have
probably replaced an old dead or fouled
set of plugs with new ones. The same thing
would have happened with any decent plug.

Chuck Tribolet

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