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HELP! Big cylinder bolt spacing measurements

Shane¹

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Anyone have any of the big cylinders laying around for some bolt spacing measurements I am planning a potential hybrid mission but need some info on where to start on a cylinder. I am thinking if anyone has 084, 088, 3120, or even an 066 or 395 cylinder laying around those would be my first options. If anyone knows of any other bigger cylinders let me know of those too. Maybe even a 390xp
 

Powerstroke Cowboy

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Nice thanks!
Stihl ms660 base bolt pattern, dimensions pulled from a cylinder.

20240328_083102.jpg

I thought I had an extra 880 base gasket laying around, but I don't. I'd have to pull the cylinder off the 880 to grab dimensions. Sorry about that.

Edit, changed wording to make it easier to find for anyone searching the web for the dimensions.
 
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Shane¹

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660 base bolt pattern pulled from a cylinder.

View attachment 413821

I thought I had an extra 880 base gasket laying around, but I don't. I'd have to pull the cylinder off the 880 to grab dimensions. Sorry about that.
Thank you very much don't worry about the 880 i am sure someone will have an 880 cylinder kicking around
 

Shane¹

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Anyone have an 088 or 084 cylinder kicking around they could measure for me those two are the ones I am curious about the most
 

Powerstroke Cowboy

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I am trying to find options for 9000 not 7900 though so one of those may work for me
I'm also 0n the lookout for an option for a 9000 as well. I do think an 880 will work with lots of modifications on the case.

@srcarr52 has put a 58mm 395 on a 9000.
 

Shane¹

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The 395 I heard was a lot of work same with 084 and 088 just wonder which one might be better but then solid runner could be just 066 would be a pretty good bump in displacement
 

srcarr52

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The 395 I heard was a lot of work same with 084 and 088 just wonder which one might be better but then solid runner could be just 066 would be a pretty good bump in displacement

I had to deck the case 0.100" to get the 395 cylinder to work as I didn't want the mounting flange to get too thin.
 
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