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-   -   Stupid spark plug question (https://www.offshoreonly.com/forums/formula/205015-stupid-spark-plug-question.html)

commandersander 03-16-2009 09:59 PM

Stupid spark plug question
 
Sorry....

Ok...now that I got that out of the way....

Port motor missing a bit, so I decided to pull the plugs and see what was what.....

I have owned this boat for three years....and had very little time out with her.....

Port motor had Autolite AR3933 "Racing" plugs....single electrode.....lots o-carbon....makes sense....smelled a bit "fat" anyway....

Starboard motor has Bosch Platinum R3 964 4-electrode....also coated....

So....logically....what reason other than simply being cheap would the previous owner have to not match plugs all around? Does one or the other mask oil blow by....or run hotter....

Finally, what should be in there?

89 357SR-1 w/ 454's and TRS

Thanks

DareDevil 03-16-2009 11:49 PM


Originally Posted by commandersander (Post 2822729)
Sorry....

Ok...now that I got that out of the way....

Port motor missing a bit, so I decided to pull the plugs and see what was what.....

I have owned this boat for three years....and had very little time out with her.....

Port motor had Autolite AR3933 "Racing" plugs....single electrode.....lots o-carbon....makes sense....smelled a bit "fat" anyway....

Starboard motor has Bosch Platinum R3 964 4-electrode....also coated....

So....logically....what reason other than simply being cheap would the previous owner have to not match plugs all around? Does one or the other mask oil blow by....or run hotter....

Finally, what should be in there?

89 357SR-1 w/ 454's and TRS

Thanks

NGK BR 6 FS !!!!! thats what i would run in there !!:cool:

commandersander 03-17-2009 09:27 AM

Thanks deredevil.....goin now to get em.....

Any idea about the reason behind the two different plugs between P/S?


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