99 Mercury/Force 75HP

[Rob Groene]

Hi all, Just wondering if anyone has this motor or knows anything about it. I am curious as to how many splines are on the prop shaft? What diameter is the gear case? 4 1/2 inches? And what is the gear ratio? I max at 5250 rpm. Thanks for your help!

 

[Pat Goff]

It's exactly the same motor as a merc 75 without oil injection.

 

[Rob Groene]

Not too argue, the lower unit is the same, the block is Force with some refinements applies by Mercury. Just look at the two side by side, big difference under the cowl.