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Old 19 May 2014, 03:52   #1
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What size prop?

I have been asked by a client to get him a new Ali prop for his 60 hp 2 stroke Mercury O/B. It is pretty old model that still requires oil adding to the fuel.
I can't read the numbers on the prop itself. Any suggestions on a a good comprise prop please?
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Old 19 May 2014, 04:00   #2
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my guess would be 15"
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Old 19 May 2014, 08:36   #3
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That'll be a clamshell I guess? - Wrap around cowl wit ha front panel pops off to reveal the catches for the main cowl?


This is entirely from memory, but 13 spline shaft, diameters go from something like 11" up to 11.75"

What it's pushing will dictate the pitch. (and to a degree the diameter)

A Yam K series should fit - IF you modify the locking arrangement!

Joking aside, unless you seriously modify the locking, you'll need a merc prop. Those engines used a lockewasher that engages on 2 pins on the back of the prop hub & bend round the faces of the nut. Almost every other O/B of that size range uses a hole in the shaft and a split pin through a castelated prop nut.
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Old 19 May 2014, 15:25   #4
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Quote:
Originally Posted by Solent Ranger View Post
I have been asked by a client to get him a new Ali prop for his 60 hp 2 stroke Mercury O/B. It is pretty old model that still requires oil adding to the fuel.
I can't read the numbers on the prop itself. Any suggestions on a a good comprise prop please?
Help me please!! I've just purchased a 2002/3 50hp mercury 2 stroke,and I am struggling to get my head around prop sizes and pitch ,I would like to get myself a nice shiny stainless one but don't want to buy in error!!!! The boat is a avon sr4. Any help or comments or advice on what or what not to get please..many thanks
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Old 20 May 2014, 04:42   #5
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Quote:
Originally Posted by Solent Ranger View Post
I have been asked by a client to get him a new Ali prop for his 60 hp 2 stroke Mercury O/B. It is pretty old model that still requires oil adding to the fuel.
I can't read the numbers on the prop itself. Any suggestions on a a good comprise prop please?
Thanks for those that responded. I managed to decipher the code yesterday.

48 73134 A40 12P so now just a case of ordering it!
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