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TOPIC: Michigan Props

Michigan Props 7 years 1 month ago #21503

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I have a PS73, PS74 and PS76. Can anyone tell me the pitch of these?

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Dick Johnson

1989 16ft Sylvan

'57 Evinrude 18 (finally found a decent one)
'58 Johnson 5.5
'72 Johnson 6.0
'61 Homelite
'64 Johnson 18
'65 Homelite 55
'66 Homelite 55
'68 Bearcat 55 (3)
'70 Bearcat 55 (2)
'71 Bearcat 85 (Sold)

Re:Michigan Props 7 years 1 month ago #21572

This is from a 1969 Michigan catalog, all are for the Homelite/Bearcat:

PS72 - aluminum, 3-blade, 11.5x13, 14 to 16' Boats, light loads
SMC620 - bronze, 3-blade, 11.5x13, 14 to 16' Boats, light loads
PS71 - aluminum, 3-blade, 11.5x12, 14 to 16' Boats, all loads, skis
SMC628 - bronze, 3-blade, 11.5x12, 14 to 16' Boats, all loads, skis
PS73 - aluminum, 3-blade, 11.5x11, 16 to 17' Boats, all loads, skis
SMC626 - bronze, 3-blade, 11.5x11, 16 to 17' Boats, all loads, skis
PS74 - aluminum, 3-blade, 11.5x10, 17 to 19' Boats, all loads, skis
PS75- aluminum, 3-blade, 11.5x9, 20 to 24' Boats, one engine
PS76 - aluminum, 3-blade, 11.5x8, cruisers, houseboats, sailboats
SMC629 - bronze, 3-blade, 11.5x8, cruisers, houseboats, sailboats
AMC712 - aluminum, 4-blade, 11.5x8, cruisers, houseboats, sailboats

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Re:Michigan Props 7 years 1 month ago #21584

Thanks, Handy Andy.
I'm glad you made that post about Homelite Props.
I have a PS71 PS75.
I also have the 4 blade AMC712 I got from Bill R. I normally use the 9" pitch 3 blade on my pontoon. But If I know it will be loaded down a lot with passengers I will put the 4 blade 8" on. The 9" (PS75)does a fine job for me with just a few passengers. Gives me a little better economy because I cruise at low speeds on the 21' pontoon. But will get up to the R"s when needed. About a 1000 RPMs when I'm just cruise around slowly. Going to install a tach on her this spring.
I put the 12" on it was bogging down too much Lugging. I took it off and put the 9" back on. B)
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Re:Michigan Props 7 years 1 month ago #21592

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yeah those 4 blade 712 props are new in the box, and great low end torque.
i sold a bunch of 2 blade go fast props earlier this year, up to 17" pitch.

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Re:Michigan Props 7 years 1 month ago #21602

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Thank You Andy!!! Now I know exactly what I have here!

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Dick Johnson

1989 16ft Sylvan

'57 Evinrude 18 (finally found a decent one)
'58 Johnson 5.5
'72 Johnson 6.0
'61 Homelite
'64 Johnson 18
'65 Homelite 55
'66 Homelite 55
'68 Bearcat 55 (3)
'70 Bearcat 55 (2)
'71 Bearcat 85 (Sold)

Re:Michigan Props 7 years 1 month ago #21660

I have amc 712 here would that have worked with my overloaded skagit 17 with 6 in it.

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Re:Michigan Props 7 years 1 month ago #21722

I think that is the lowest pitch prop for the Homelite/Bearcat 55. Am I right? It gives me good low end torque but not as much speed. The 4 blade has more steering control too. I use this on my 21' pontoon. Might be better on a boat.

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Re:Michigan Props 6 years 1 month ago #51049

Hi all,
Just got back into the work force after almost three years of forced retirement. Be that as it may, now I have a cash flow again. I need a recommendation for the most effective prop for my 17 ft. Boston Whaler. The ones I am running now I am lucky to get 22mph GPS @ WOT. I cannot complain about the low end though. It trolls down to 1.5mph GPS before kicking out of gear. The engine is a 1966 Homelite.
A friend and I would like to do a trip across Lake Michigan from Port Washington, WI to Ludington, Michigan approx. 50mi. and I was hoping to get the boat to run 22-25 mph @ 3/4 throttle. Is this doable?
Tom from Rubicon, WI

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Re:Michigan Props 6 years 1 month ago #51096

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Tom,
My 16ft Sylvan weighs 690lbs, add 6 to 12 gallons of fuel two bodies at about 450lbs, complete top, livewell full of water, anchor, fishing gear,(1300lbs total?) we average about 27 mph (gps) wot between the four different Homelite and Bearcats that I have ran on it. This last engine is running a 12 pitch prop, runs 28mph @ 5400rpm and will troll @ 1.5mph

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Dick Johnson

1989 16ft Sylvan

'57 Evinrude 18 (finally found a decent one)
'58 Johnson 5.5
'72 Johnson 6.0
'61 Homelite
'64 Johnson 18
'65 Homelite 55
'66 Homelite 55
'68 Bearcat 55 (3)
'70 Bearcat 55 (2)
'71 Bearcat 85 (Sold)

Re:Michigan Props 6 years 1 month ago #51151

I wonder what a 13 pitch would do? My buddy has the same 1973 Boston Whaler Cohasset as I do with a 60hp Mariner that really flys.

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