11cc outboard head shim question

[Jcazz]

Hi everyone.. I just wanted to see what head clearence you all were running with an 11cc outboard engine on 30% odonnel fuel. I currently checked my head and measured the shims. It seems that it is 8 thousands of an inch, well the two shims add up to this amount. I run a hot plug also. Is this the correct setup for this engine. Also running HTB pipe and header. Thx!

 

[Jcazz]

bump! help i need to know!

 

[Ray Sametz]

Hi everyone.. I just wanted to see what head clearence you all were running with an 11cc outboard engine on 30% odonnel fuel. I currently checked my head and measured the shims. It seems that it is 8 thousands of an inch, well the two shims add up to this amount. I run a hot plug also. Is this the correct setup for this engine. Also running HTB pipe and header. Thx!

Jcazz, Total H.C. should be .018 to .020. Measure top of piston to top of liner. Measure head button an subtract. Add shims. hope this helps. Ray