Thread subject: Whaler Central - Boston Whaler Boat Information and Photos :: Plug gap and torque measure

Posted by jddar on 04/07/08 - 6:12 PM
#1
I am preparing my 1998 90 HP OMC for the upcoming season. I have recently installed new NGK plugs in place of my old champions. I used the same gap as the champs and didn't use a torque wrench as the manual implies. The engine seems to run a bit high at idle but no other problems. I assume I need to gap these plugs differently, but do I really need to purchase a torque wrench? My engine info is a follows: 1998 OMC Oceanpro Model # E90SLEC

Thanks,
JOE

Posted by Binkie on 04/07/08 - 6:20 PM
#2
I never torque plugs. I just go by feel, not to tight. Remember you can strip out aluminum

rich

Posted by Davidk on 04/07/08 - 6:44 PM
#3
Not saying that you have an issue, but be aware that there is more to plugs than the gap. Different plugs are designed to run different temps (some plugs run hotter than others). That may have something to do with the change.

Posted by Derwd24 on 04/07/08 - 7:27 PM
#4
First, I'd take a look at a page like this one below and see if the NGK's you installed cross to the old Champions and go from there...

http://www.clubplug.net/champ_ngk.htmlp_ngk.html

Posted by seahorse on 04/11/08 - 3:15 PM
#5
jddar wrote:
I am preparing my 1998 90 HP OMC for the upcoming season. I have recently installed new NGK plugs in place of my old champions. I used the same gap as the champs



You might want to rethink and replace the NGK plugs in your OMC. Those motor require a Q series plug from Champion to work the ignition system correctly. Your motor requires a suppressor sparkplug, not a resistor plug.

You can refer to the factory sparkplug chart at:

http://continuouswave.com/whaler/refe...rt2008.pdf

Of course someone will ask "why the Q plug" so here are some links:

http://www.championsparkplugs.com/glo...nID=2&pt=1

http://www.championsparkplugs.com/glo...nID=2&pt=1