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Author Topic: Poulan plugs CJ8 v/s CJ8Y  (Read 11327 times)

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Offline Cut4fun .

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Poulan plugs CJ8 v/s CJ8Y
« on: August 20, 2016, 09:15:05 pm »
Is there any other differences in the champion cj8 sparkplug and the cj8y spark plug that has the extended electrode?

Thats the only difference I know of. Is the heat range etc the same? Guessing yes going by 8.

Reason I ask I know the countervibes called for CJ8Y but most come in with CJ8 and I was ask is it ok to replace with cj8 instead of cj8y.  IMO I thought it would be ok.

Any draw backs of this?
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Offline Cut4fun .

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Re: Poulan plugs CJ8 v/s CJ8Y
« Reply #1 on: August 20, 2016, 10:05:57 pm »
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Offline RoyM

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Re: Poulan plugs CJ8 v/s CJ8Y
« Reply #2 on: August 20, 2016, 11:44:56 pm »
 The extended tip CJ-8Y is a 2 stroke plug that extends for more complete combustion. The CJ-8  was designed for 4 cycle applications with flat top pistons, it will work in a 2 stroke but won't burn as clean..
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Offline ms460woodchuck

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Re: Poulan plugs CJ8 v/s CJ8Y
« Reply #3 on: August 21, 2016, 12:06:53 am »
Quote from: RoyM on August 20, 2016, 11:44:56 pm
The extended tip CJ-8Y is a 2 stroke plug that extends for more complete combustion. The CJ-8  was designed for 4 cycle applications with flat top pistons, it will work in a 2 stroke but won't burn as clean..
Wow...if the cj8 is not a 2stroke plug then why is that what a lot of the older poulans 306-245-361 came with and call for in the books? not doubting you just don't understand this.
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Offline RoyM

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Re: Poulan plugs CJ8 v/s CJ8Y
« Reply #4 on: August 21, 2016, 11:12:21 pm »
The piston and combustion chamber design probably did not allow for the extended tip plug, I never experimented with it to find out. I remember being curious about it but went with what the factory recommended.
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