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Gravely L8 Cyl Head on backwards


 
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Bill Deering
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Joined: 05 Jan 2003
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PostPosted: Tue Sep 15, 2020 8:24 am    Post subject: Gravely L8 Cyl Head on backwards Reply to specific post Reply with quote

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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Russ from MN
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Location: N MN

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PostPosted: Wed Sep 16, 2020 8:36 am    Post subject: Re: Gravely L8 Cyl Head on backwards Reply to specific post Reply with quote

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
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PostPosted: Wed Sep 16, 2020 10:17 am    Post subject: Re: Gravely L8 Cyl Head on backwards Reply to specific post Reply with quote

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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DoubleO7
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PostPosted: Sat Sep 19, 2020 7:29 am    Post subject: Re: Gravely L8 Cyl Head on backwards Reply to specific post Reply with quote

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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Bill Deering
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PostPosted: Wed Sep 23, 2020 6:53 am    Post subject: Re: Gravely L8 Cyl Head on backwards Reply to specific post Reply with quote

Thanks 007, you're a better sleuth than I. Had it running this past weekend, mowed the lawn. No problems. I
measured the head temperature by the exhaust at 180F after about 5 minutes. Seemed OK.

 
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