mac cmb case size ?

[Mike Siriani]

can someone tell me if cmb 91hr will fit in place my mac 84

need new motors for my twin

Thanks Mike

 

[Don Ferrette]

can someone tell me if cmb 91hr will fit in place my mac 84need new motors for my twin

Thanks Mike

Not without changes, the 91HR is wider & bolt pattern is different.

 

[Joe Warren]

can someone tell me if cmb 91hr will fit in place my mac 84need new motors for my twin

Thanks Mike

The HR is more in line with swapping places with a K-90 that was 1.900 width. Both the K 90 & the HR are wider than the MAC. But with a few changes in the M/M spacers many would adapt.

 

[Joe Warren]

can someone tell me if cmb 91hr will fit in place my mac 84need new motors for my twin

Thanks Mike

Mike the Hr91`s will fit into a Roadrunner & Andy has run them in his SGX twin also. What Brand of Twin do you own? You need to consider also the Spacing on the drive lines also when you install engines that are wider. Many TWIN 80 boat kits had the drive lines closer together. Something to also consider before you buy 90 series engines. JW.