Test Wheel

[ken-w]

Is it possible to make a test wheel from an old propeller by cutting it down?

[vintin]

Interesting idea!

[Casey Lynn]

Absolutely !!
Cut the blades of an existing propeller in an arc, concentric around the centerline. Cut as much as you need to achieve WOT RPM at a predetermined static water line.

[RICK EICHRODT]

Very true, you can indeed make a test wheel. When I was at the Mercury service school some years back, that is what they did, cut down props and by lopping off say 1 to 2 inches off the diameter, they achieved their goal of WOT in the test tank.

[garry-in-michigan]

This is how Consumers Union did it …

. . . 🙄

[frankr]

Interesting that in spite of all that grief and failures, all were rated "Acceptable". I guess people didn’t expect much in those days?? But congrats to the three that made it for 100 hours. Not surprisingly, Johnson and Merc 5hp and Evinrude 7.5.

[Mumbles]

It looks like the TN and Fleetwin were at the top of their class along with the little Merc!

That would be a great job running motors at full throttle all day long and not having to pay the repair bill when they break! How do I apply?

[billw]

Knowing what I know about Mercury Super Fives and their fragile lower units, I am very surprised at its making it past 100 hours. I’m pleased, but surprised. Then again, I am just as surprised that the Fleetwin didn’t throw a rod…..

Long live American manufacturing!

[Author]

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