I have a '74 20SF with a 2017 Suzuki 140 on a 26" Hermco bracket. I messed around this summer with a 4 blade SS stern lifting prop through Ken at Prop Gods . In the end wasn't thrilled with the difference and it added an idle rpm vibration for some reason that wasn't there with the original 3 blade aluminum Suzuki prop- could just have been a issue with this prop that I tested. Ended up returning the 4 blade prop. I also think my motor might be a tad too low so have raised it to the last highest hole and will take another swing in the spring to get to a SS prop. Ken was good to deal with and offered good feedback and suggestions on options that might work. Attached are the numbers I gathered but wouldn't say these are exactly right as wind, chop conditions were not great on the days I took the numbers. When I am able to get the boat back in the water, will see if these change with the aluminum 3 blade that the dealer provided with the motor.
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