Yamaha 0x66 Smoking

[Intrepid1]

I have 1997 0X66 250 twin
They have been running great but recently started smoking. I did start using Penzoil oil but I have used other brands than Yamilube with no smoking. The engines probably need to be serviced but would this oil cause smoking? Since they are both smoking. How do you adjust the electronic oil mixture?
How do you clean the 02 sensor?
Thanks

 

[cousinabe]

Re: Yamaha 0x66 Smoking

this thread explains oil linkage adjustments.
http://forums.iboats.com/showthread.php?t=272179
you may have to snip off five threads on the linkage rod to get the arm to seat correctly.

oil pump seal could be a culprit.

link on servicing the O2 sensor. Disregard the bench test/flame test procedures as they are useless.
http://www.boatsetup.com/O2sensor.pdf

my preventative maint items include:
1) replace low pressure fuel pumps
2) replace/clean VST screen and o-ring.
3) clean pressure regulator screen on VST.
4) clean fuel injector screens
5) clean/test O2 sensor for proper output voltage.
6) replace water pump
7) replace engine filter and water separator filter.
8) inspect/clean out popit valve; PRV.
9) link and synch and set TPS.
10) replace thermostats.
11) check that resistance of spark plug caps are in spec.
12) properly adjust the oil linkage rod.
13) clean filter on remote oil tank.