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Thread: Spark plugs?

  1. #1

    Spark plugs?

    Went to autozone yesterday to pick up some extra sprak plugs. I asked for NGK BR8ES-11. He told me he didnt have those in stock so he gave me what was "equivalent" to them which are BOSCH 7986. when i took the NGK and the BOSCH and compared them side by side. The part that goes into the engine is shorter on the BOSCH. There is a label on the engine that says NGK BR8ES-11. Would the BOSCH being shorter make a difference? would it be safe to run these they are shorter and thinner than the NGK. Thanks in advance. Jet ski is a 2005 Yamaha XLT 1200.

  2. #2
    OzarkYamMonster's Avatar
    Join Date
    Oct 2012
    Lake Of The Ozarks
    Well the label is there for a reason, although the plugs will fire .... you will not it correct .. return them & shop elsewhere .

  3. #3
    TuningForkMarine's Avatar
    Join Date
    May 2013
    Palm coast FL / Shakopee MN
    my autozone has them in stock. i get them suckers in bulk

  4. #4
    ...on the 11's the grounding arm has a different/longer radius reach so that when you gap it the arm is more parellel with the electrode. (1200/1300's take a larger gap than 800, 760, etc..) More suface area for proper firing. The other side-benefit is a solid insulator tip.

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  6. #5
    This is how I run a jetski shop in the desert nmpeter's Avatar
    Join Date
    May 2008
    Elephant Butte New Mexico
    the -11 plug are the only ones that can be properly gapped to 1.1mm

    substitutes never work..for sparkplugs and instructors

    what they sold your were b8HS the short reach plugs for Yamaha. they won't work well if at all.

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