Spark Plug Reading

[THOMMO59]

I have a 2011 Pro XS Opti 115, only done about 5-6 hours and I thought I would have a quick look at plugs for the sake of it. No 1 is leaner than 2 & 3 and as it is still in the running in phase, I expected 3 rich plugs.



Are the cylinders tuned indivdually or fuel managed by the ECM possible to supply different rates of fuel. I run at sea level only with the temp has been between 60 - 80 most times out.



Lastly, I have read through my manual but I can only see that the engine should have a service oncxe yearly or approx 100 hours, is it supposed to got back to the dealer for a "first service" earlier to check these sorts of things?

 

[byron cooley]

The first service is the 20hr shake down.

 

[Bob Bourget2]

No, cylinders are not tuned individually, but as a pair of three, pre-mapped with constant adjustments with input readings from various sensors. You don't have enough time on the engine to start reading plugs. It takes about 50 hours to properly run one in, seat rings, cylinder walls, etc. On the Opti's, you are not able to really "read" plugs due to the extreme "clean" and "complete" combustion they are designed with. On the older 2-strokes and 4-strokes, you can....these motors are not so easy.

 

[THOMMO59]

Thanks Bob,

Much appreciated