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Thread: spark plugs

  1. #1
    PWCToday.com Is My Home Away From Home fastgtfairlane's Avatar
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    spark plugs

    question. i have a 750 out of a 94 ssxi with the green head. the when i got it the plugs were br8hs. which ive used since. most kawis ive seen all had br8es. the H plugs are shorter threaded area than the E plugs. i saw a kawi owners manual for the 94 ssxi and it said to use the E plugs. wonder why mine had the H plugs instead of the E plugs. i went back with the H plugs because i didnt want to risk the piston hitting the plug because its hanging too low in the combustion chamber. it runs fine with the H plugs but if its supposed to have the E plugs i bet it will run better.
    Last edited by fastgtfairlane; 11-05-2017 at 01:02 AM.
    91 440; PJS Viper 7000, jetsport exhaust mani, factory full pipe, coffman waterbox,solas 17*, jetco worked 440 pump, ocean pro nozzles. shredmaster ocean rideplate and grate combo, wide tray, footholds, deep strake mod, driveshaft fill,650sx quick turn

    build thread part 1: http://www.pwctoday.com/showthread.php?t=331343
    build thread part 2: http://www.pwctoday.com/showthread.php?t=364872
    build thread part 3: http://www.pwctoday.com/showthread.php?t=396154

  2. #2
    PWCToday.com Is My Home Away From Home Grumpy Old Guy's Avatar
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    Re: spark plugs

    No Kawasaki ever used "H" plugs.

  3. #3
    PWCToday.com Is My Home Away From Home fastgtfairlane's Avatar
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    Re: spark plugs

    yeah i didnt think so. ive only ever seen the H plugs on yamahas. the threaded portion of the H plug is shorter than the E plug.
    91 440; PJS Viper 7000, jetsport exhaust mani, factory full pipe, coffman waterbox,solas 17*, jetco worked 440 pump, ocean pro nozzles. shredmaster ocean rideplate and grate combo, wide tray, footholds, deep strake mod, driveshaft fill,650sx quick turn

    build thread part 1: http://www.pwctoday.com/showthread.php?t=331343
    build thread part 2: http://www.pwctoday.com/showthread.php?t=364872
    build thread part 3: http://www.pwctoday.com/showthread.php?t=396154

  4. #4
    PWCToday.com Is My Home Away From Home mcn6's Avatar
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    Re: spark plugs

    BR8ES is what you want.



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  5. #5
    PWCToday Newbie mitcho4747's Avatar
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    Re: spark plugs

    I would definitely swap those out for some br8es. The only other model i've heard people use is the b8es (no 'r'). This is resistor versus not. And that's just with the simple set ups: if you have resistor caps, get non resistor plugs, or if you have resistor plus, get non resistor caps.
    What does it run like with the 'h' plugs in it? How much of a difference are you getting? (a shorter plug would changing the volume in the compression/squish area and proximity of the spark-but i imagine it's not much, does it REALLY make a difference?) Of course, the spark itself could have different ratings.. (power/timing wise)
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    PWCToday.com Is My Home Away From Home fastgtfairlane's Avatar
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    Re: spark plugs

    going to today. it ran fine honestly. it does however use a ton of fuel. been running the shorter plugs for a while now ever since ive gotten it running. im sure after i run it with the correct plugs ill have to retune the carbs. checking the plugs they were always dark like too cold almost. might try to get out for a few today to see how it runs with the correct plugs.
    Last edited by fastgtfairlane; 11-05-2017 at 12:38 PM.
    91 440; PJS Viper 7000, jetsport exhaust mani, factory full pipe, coffman waterbox,solas 17*, jetco worked 440 pump, ocean pro nozzles. shredmaster ocean rideplate and grate combo, wide tray, footholds, deep strake mod, driveshaft fill,650sx quick turn

    build thread part 1: http://www.pwctoday.com/showthread.php?t=331343
    build thread part 2: http://www.pwctoday.com/showthread.php?t=364872
    build thread part 3: http://www.pwctoday.com/showthread.php?t=396154

  7. #7
    PWCToday.com Is My Home Away From Home mcn6's Avatar
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    Re: spark plugs

    With a stock or basically stock motor you probably won't notice much of a difference in performance, if any. Depending on how much carbon has built up on the last few threads where the shorter plugs didn't reach, could get interesting when threading the longer spark plug in?



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  8. #8
    I dream skis
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    Re: spark plugs

    Wrong size-(too short) can have carbon buildup like mcn6 says. but at least he can run a thread chaser down the hole first to clean it up.
    A more serious problem is when wrong size (too long) plugs get carbon buildup on the protruding threads inside the chamber. Then you can't back the fouled plug out and have to remove the head. People worry about plugs so long they hit the piston, but even a thread or two (too long) can run the engine OK, but you can't get 'em out. Decades ago (I'm an old guy) most plugs on American made stuff were nearly all the same size. Now there are a million different plugs. Check your manual, or research a spec sheet and use the right size.
    OLDGUY sez..... "The older I get, the better I was !

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    PWCToday.com Is My Home Away From Home fastgtfairlane's Avatar
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    Re: spark plugs

    the correct plugs threaded right in no problem.
    91 440; PJS Viper 7000, jetsport exhaust mani, factory full pipe, coffman waterbox,solas 17*, jetco worked 440 pump, ocean pro nozzles. shredmaster ocean rideplate and grate combo, wide tray, footholds, deep strake mod, driveshaft fill,650sx quick turn

    build thread part 1: http://www.pwctoday.com/showthread.php?t=331343
    build thread part 2: http://www.pwctoday.com/showthread.php?t=364872
    build thread part 3: http://www.pwctoday.com/showthread.php?t=396154

  10. #10
    PWCToday.com Is My Home Away From Home fastgtfairlane's Avatar
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    Re: spark plugs

    Quote Originally Posted by mcn6 View Post
    With a stock or basically stock motor you probably won't notice much of a difference in performance, if any.
    dont be ridiculous, the longer plugs are going to pick up 20 hp over the shorter ones
    91 440; PJS Viper 7000, jetsport exhaust mani, factory full pipe, coffman waterbox,solas 17*, jetco worked 440 pump, ocean pro nozzles. shredmaster ocean rideplate and grate combo, wide tray, footholds, deep strake mod, driveshaft fill,650sx quick turn

    build thread part 1: http://www.pwctoday.com/showthread.php?t=331343
    build thread part 2: http://www.pwctoday.com/showthread.php?t=364872
    build thread part 3: http://www.pwctoday.com/showthread.php?t=396154

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