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800 etec spark plugs

Discuss 800 etec spark plugs in the SKI-DOO CHAT forums; how often do the etec guys change your plugs,also do you even carry spares, and ive heard when you do ...


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    Member rotormech's Avatar
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    800 etec spark plugs

    how often do the etec guys change your plugs,also do you even carry spares, and ive heard when you do put plugs in they have to be put in tightend at a certain spot to work right?



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    Re: 800 etec spark plugs

    That's something I'm going to have to learn also this year. The process is called indexing and the gap in the plug has to be at a certain spot.

    It will be interesting to read the responses.

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    Re: 800 etec spark plugs

    indexing thats the word i was looking for,i havent looked close yet but there must be a mark on the plug and the head.

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    Re: 800 etec spark plugs

    indexing is a old myth.... mayby not for a etec as it is a "sensitive" engine.

    the theory is to align the spark plug so that the open side of the gap is facing the exhaust port. Combustion and flame front will then push out of the exhaust port
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    Re: 800 etec spark plugs

    You might consider it a myth, but evenrude e-tec motors required indexing the plug due to the direct injection system used (same system in the e-tec sled motor) the open side must be aligned with the fuel injector.

    apparently the etec indexed plugs were guaranteed for 3 years? Or so I thought last year.

    I know they were $21-22 from Ski-doo per plug.
    Last edited by takethebounce; November 1st, 2011 at 06:54 PM.
    thinking of something even better...

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    Re: 800 etec spark plugs

    Quote Originally Posted by takethebounce View Post
    You might consider it a myth, but evenrude e-tec motors required indexing the plug due to the direct injection system used (same system in the e-tec sled motor) the open side must be aligned with the fuel injector.

    apparently the etec indexed plugs were guaranteed for 3 years? Or so I thought last year.

    I know they were $21-22 from Ski-doo per plug.
    You did get warranty though, right?
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    Re: 800 etec spark plugs

    It was a claim I remember from last year for the plugs. Regardless, its cheap insurance every year to replace plugs.

    Indexing is not a big deal. You have basically a 180 degree window to have the open end facing the injector.

    Its very possible that the engine management system in the e-tec could pick up a bad ignition cycle from an inproperly installed/indexed plug.
    thinking of something even better...

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    Re: 800 etec spark plugs

    This is not actually done by us the installer it is a design feature from the sparkplug manufacturer unless your installing extra washers or removing them to increase or decrease the useable thread count that enters the cylinder head. therefore the plug will usually be in the 180 degree position that is required for better burn.... but yes mor washers will put it into optimal position.. no argument there



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    Re: 800 etec spark plugs

    Most should be ok, but it is best to double check & ensure the proper positioning, I don't know the full reason for it with direct injection, but I assume it has to do with the piston/head design to provide the best flame travel & igniting properties (I am not even sure if they use a small bowl/dish or a piston deflector on these ones, sorry I forget the proper terminology right now but there are 2 basic DI designs). Automotive racers have been indexing plugs for years with shims to improve the flame travel for more power, a % or two doesn't sound like much but try one % on 1000+hp vehicles, it all adds up, & when you have to win to get paid you pay attention to detail.
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    Re: 800 etec spark plugs

    dont touch your plugs on your etec.

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