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Garden Tractors Discussion Forum

Gravely L8 Cyl Head on backwards

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Bill Deering

09-15-2020 09:24:57




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In all of the pictures and manuals i've seen it the spark plug points to the right (intake side). Mine is opposite. The cylinder head looks symmetrical,and it has been running fine. Just curious if this will be bad in the long run. I've only put about 4 hours on it since i got it, but unknown how long its been like this.




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DoubleO7

09-19-2020 08:29:49




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 Re: Gravely L8 Cyl Head on backwards in reply to Bill Deering, 09-15-2020 09:24:57  
I googled gravely L8 images.

Quite a few had the plug threads on the exhaust side.

I bet 25% showed that way.



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Russ from MN

09-16-2020 09:36:37




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 Re: Gravely L8 Cyl Head on backwards in reply to Bill Deering, 09-15-2020 09:24:57  
I can't imagine it's on backwards, isn't there a relief for the valves on one side?. If it was backwards the head would hit the valves and not even touch the block.



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Bill Deering

09-16-2020 11:17:17




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 Re: Gravely L8 Cyl Head on backwards in reply to Russ from MN, 09-16-2020 09:36:37  
Russ, I know what you're thinking, if the valves were on the same side. On this gravely engine the valves are on opposite sides of the piston. I've heard it called a T-Head engine. Below is a picture of the inside of the head I found on the 'net. It doesn't look like anything will hit. In the factory configuration, the plug gap would be pointing at the intake side, which may help cool off the plug. On mine the plug gap is pointed at the exhaust side. I'll correct it someday, but for now i need it to mow my camp in Vermont. Pretty much the only time i use the gravely.

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