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Spark plug
Posted: Sun Aug 31, 2014 5:09 pm
by Kenocala
I am getting ready to change the spark plug on my pcx150 for the first time. The original plug, that I removed, did not have the washer on it. The owners manual says: to install new plug, with washer. So .... was the factory right, or is the owners manual right? (Same plug - NGK 3901 cpr7ea-9)
Re: Spark plug
Posted: Sun Aug 31, 2014 11:34 pm
by WhiteNoise
Hi and welcome to the forum(s)
Your question(s) had me looking at both owners manual and the shop service manual. You are correct, the owners manual does say to install with washer on. The shop manual makes no mention of a washer at all.
I'm pretty sure the washer stays on. Why not wait for another response or two? We have some very smart techs and mechanics on board
Re: Spark plug
Posted: Mon Sep 01, 2014 4:51 am
by Alibally
The spark plug will have a washer on it. It doesn't come off. Remove the old plug. Check the new one is the correct type and there is a gap in the electrode on the end. That should be 0.8 - 0.9 mm. Install the new plug and torque it to 16nm. This is basically tight enough to crush the washer. Refit the coil lead to the top of the spark plug, job done.
Re: Spark plug
Posted: Mon Sep 01, 2014 4:53 am
by Alibally
It's in Vietnamese or something but you get the idea.
Re: Spark plug
Posted: Mon Sep 01, 2014 5:21 am
by Kenocala
Thanks to all! Just could not understand why the one I removed did not have the washer. I have gapped the plug, put it in, and should be "good to go" Thanks again!
Re: Spark plug
Posted: Mon Sep 01, 2014 6:56 am
by iceman
The old washer was not left behind was it? Hope not.
Re: Spark plug
Posted: Mon Sep 01, 2014 10:39 am
by Kenocala
No washer left behind. I double checked! Thanks
Re: Spark plug
Posted: Mon Sep 01, 2014 10:58 am
by WhiteNoise
There ya go! You just got help from one of our best! Thanks from me too Ali
