JoshKeller
Well-known member
bought a used boat with a 50/35 1994 johnson jet on it. motor runs good, however, it just feels like something is missing. no matter how i load the boat, it does 22 - 23 mph. Took a look at bigterps motor (same as mine), and he gets much better performance than mine. Well tonight it all came together. he let me borrow an impeller to compare/test, and it appears my motor has a 5 7/8 impeller installed instead of the medium. also explains why our impeller keys are different - mines much larger/taller, presumably to make up for the difference in the 3/4" driveshaft vs the recommended 5/8"
i assume this is horribly effecting my performance? that also likely explains why my motor turns 5700 rpm all day long and his turns 5200?
next question, anyone have a used medium impeller/key for sale? thanks guys!
i assume this is horribly effecting my performance? that also likely explains why my motor turns 5700 rpm all day long and his turns 5200?
next question, anyone have a used medium impeller/key for sale? thanks guys!