1996 23' Checkmate Bbc Question
#7
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Besides the fact that you cant get any more rpms out of this motor, something is seriously wrong here. How is it possible that you can spin 3 different pitch props and still get the same exact top speed? Unless the slip changes drastically between these props, it is mathematically impossible.
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It's possible, and mathematicly possble: anything can happen when dealing with a boat. Same speed with diffrent props happens all the time. I was takling with Johnson propeller in freeport yesterday and he said it happens all the time where guys a fustrated when they buy $500 - $1000 props and they get no change in speed or rpm.
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Something very strange is going on. No way a 19p and 25p could have same run numbers, that's too big a size difference even with prop mods.
Are you sure the motor only turns 4600 ? Verify that the tach is able to travel beyond that so it is not a tach issue.
How could you get 61 with a 19p ? You'd really be twisting that motor.
Are you sure the motor only turns 4600 ? Verify that the tach is able to travel beyond that so it is not a tach issue.
How could you get 61 with a 19p ? You'd really be twisting that motor.