9.5hp plastic ring between prop and gearcase

This topic has 16 replies, 8 voices, and was last updated 4 years, 4 months ago by crosbyman.

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December 5, 2019 at 1:05 pm #188634
wek
Participant
Found this in reference to plastic props on the 9.5:

https://forums.iboats.com/forum/engine-repair-and-maintenance/johnson-evinrude-outboards/508827-plastic-prop-on-73-9-5-evinrude
December 5, 2019 at 2:01 pm #188638
Mumbles
Participant
My parts book shows the ’64 – ’72 9.5’s coming with an 8 1/8 X 8 1/2 three blade aluminum prop, P/N 385940 while the last year 1973 9.5 came with an 8 1/8 X 8 three blade Lexon propellor with the same part number. The 4 and 6 horse motors in the early 70’s were equipped with Plastic props.
- This reply was modified 4 years, 4 months ago by Mumbles.
December 5, 2019 at 2:51 pm #188650
frankr
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US Member - 1 Year (includes $3 online payment fee)
I serviced a fleet of 9.5hp rental motors in the 1960’s. Yes, at some point the aluminum prop was superseded by a plastic version. Believe it or not, the plastic ones far outlasted the aluminum ones. Those rental motors got ran over sand bars and oyster bars on a daily basis.

I go with whoever mentioned monofilament line in a previous post. The stuff gets wound in there tight and actually melts and fuses together. You wouldn’t think it could get hot enough to melt, being underwater, but it does.
December 5, 2019 at 3:40 pm #188654
Mumbles
Participant
December 5, 2019 at 5:16 pm #188670
crosbyman
Participant
Canada Member - 2 Years
gents, at 70 I known monofilament and.. believe it or not mono did not melt itself into a perfectly white ring band between the prop’s back edge and the gearcase.

I have to conclude that if anyone on here has never seen one it must have been some kind of contraption placed there.

Another possibility is that the prop installed on this freebie 9.5 (yes free 🙂 ) was the wrong one with it’s back edge not long enough to fill the back gap to the gearcase…so the PO installed the white spacer band ??? .

my only beef now is that I have to wait for ice out ….in late April 🙂 to trial run my freebie.

I’ll pull the prop and check the mdl #

thanks all for scratching our heads 🙂

Joining AOMCI has priviledges 🙂
December 5, 2019 at 9:50 pm #188699
wek
Participant
I had first hand experience that monofilament can fuse into what looks like a perfect ring. My own green monofilament got caught up in the prop and when I checked it later, a green perfect ring, without any loose strands sticking out as in the above pictures, was on the prop shaft behind the prop.

Coincidently it was on a 1966 Evinrude 9.5
December 6, 2019 at 11:31 pm #188788
crosbyman
Participant
Canada Member - 2 Years
# 385940 plastic .. Lexon… prop …8.25×8 is what is installed on the 1965 MQ10 of mine so it is the newer version of the original aluminum prop 🙁 as per Mumbles description

Joining AOMCI has priviledges 🙂
- This reply was modified 4 years, 4 months ago by crosbyman.
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