sparkplug gap 1998 225 hp

[ntimidatr500]

Any one know what the gap supposed to be on a 1998 merc optimax 225. got brand new plugs but can't locate info on what the correct gap should be ,Heard alot of horror stories on installing new plugs thanks

 

[galamb]

Re: sparkplug gap

For a 98 model you should be running either:

NGK PZFR5F-11 (heavy duty use) or NGK ZFR5F-11 (light duty) gapped at .040"

Don't let a shop cross ref to another plug brand. The Champion RC10-EEC which was called for in the 97 models should not be used in the 98's....

 

[tritonman2001]

Re: sparkplug gap

Use the heavy duty, if I am not mistaken they are gapless plugs.