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I have been reading more and more posts about not to run NKG's sparkplugs in your rudes/johnstons,I have a 82 150 johnston what champion plug shouldi be running in this motor? thanx for any tips on this.
You should use the recommended plugs which are Champion Surface Gap UL77V or QUL77V. The Q plugs give additional electronic noise suppression.
Edit: You can find the original spark plugs and any superseding plug changes at the BRP on line store by selecting the ?Cylinder and Crankcase? diagram and clicking on the diagram number next to the spark plug.
Once the line item is shown with the part number, you can check for superseding plugs by clicking the magnifying glass icon on that line.
LOL thanx tashasdaddy, I was coming back in here to ask about the gap on these plugs! man you guys are on top of it around here. also was wondering what would be the best plug I have 3 differnt numbers to go off what would you all put in to this motor if it was yours? thanx for any advice on this.
Any of those will work well. Personaly I like the QL77JC4 because they are the least expensive and run pretty cool. I've never shortened the gap from what they come with (on recreational motors) and have had them last for a very long time. I usually end up changing them "just because" rather than because they wear out.
Dhadley is making a personal recommendation and he has the most experience with the engines in your range.
The plugs with numbers containing V are surface gap and require no gap setting ever.
The .030 gap is applicable to the QL77JC4 plugs and is not universally accepted but is recommended by BRP in most applications where it is the recommended plug.
