1999 225 Optimax holeshot

[Dehaan28]

I have a 99 225 optimax and this past weekend I was out and my holeshot was non existent, and my top end speed/rpm was lower than normal by like 300-500 rpm. My questions is could it be just plugs? coils? injectors? Thanks

[Savage]

Could be any of those things. Perform a spark test as the problem is occuring.

[SilverFox579]

What's maintenance history on this engine? How old are the plugs?

[Dehaan28]

What's maintenance history on this engine? How old are the plugs?

Boat is new to me in November, I will be changing plugs this weekend and will report back. thanks guys.

[Dehaan28]

[Savage]

Yep time to change.

[terry5357]

I'd definitely be changing plugs. The one in the middle looks long gone!

[JOE54]

that mtrs way too rich for some reason better check it close for fuel leaking in air side or other reasons / not firing

[SilverFox579]

I don't know how long the "PZ" designation plug has been gone, but those plugs are definitely overdue for replacement. Would make me suspect any other maintenance items as well. Good info in the FAQ at top of forum and you might want to read these two in particular (if you haven't already). I'd replace the plugs and see how it runs, if still down on power, I'd do as Joe recommends.

Recommended Annual Maintenance or Winterization for Optimax Engines

Oil, Battery, Spark Plugs, Fuel and Fuel Additive Recommendations

[Dehaan28]

UPDATE: I changed the plugs and filters, runs like a completely different motor. Took it to a local shop, they checked it all out and said it only needed plugs and everything was good to go!

[SilverFox579]

Be sure to stay on top of plug change interval in future. Mine get replaced every year regardless of hours since last set (I never get 100hrs in a season).