Home › Forum › Ask A Member › 75 hp Johnson Stinger › Re: 75 hp Johnson Stinger
Sorry, should have mentioned as well. The short shaft (racing model) did not have power TNT, which you wanted. The long shaft did however.
The actual cases are different as well. Short shaft had what they called the Sprint Drive. Smaller than the long shaft cases.
The Stinger gets its extra RPMS from having smaller wrist pins and bearings, that are closer to the top of the piston, with longer rods. Carb is different than the standard model as well if I remember correctly.
They really don’t need much work to make em scream. Mild exhaust port work, shaving the head, getting the compression up to around 180 psi, proper setup, and proper prop, with correct jetting, will get you going. Going quickly too.
If you find one with some hours on it, open her up and change out the rings and hone cylinders. Once the cross hatch is gone, they lose low end power.