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Old 30 April 2011, 11:08   #1
Zan
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Country: UK - Scotland
Town: Glasgow
Make: Avon SR 5.4
Length: 5m +
Engine: 90HP Yamaha Outboard
Join Date: Mar 2009
Posts: 51
Need a replacement propeller

Afternoon all!
I have a newly acquired SR5.4 with 90HP 2-stroke yamaha outboard from approx the mid-90s I believe. I've dinged the propeller that was on it (already, I know!) and wanted some suggestions before I just replaced it with another the same.

At the mo, it's got an aluminium 3-blade prop on it, marked 13.5X 15K. It's got a black finish rather than white (don't care about the colour, but does that make it a US version or something?).

I'll be using the boat for a range of things, including diving and more general playing about / longer cruises around the west coast of Scotland mostly. It'll probably have 6 people max on it at any point, or 4 divers + kit. Anyway, any suggestions for a replacement would be greatly appreciated (as well as any good suppliers!).

Cheers!
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Old 30 April 2011, 13:21   #2
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Country: USA
Town: Oakland CA
Length: 3m +
Join Date: Feb 2005
Posts: 6,653
Choose your prop based on performance. Were you hitting the upper range of the manufacturers WOT rpm with the old prop? If so, you were pretty close as far as pitch and diameter go.

If you're taking a bunch of divers, you're going to load the boat up a bit, so it may be that you can drop an inch or so in pitch, and be a little careful about rpm when running light. I get around that by carrying a spare 2 inch shorter prop for when all the dive buddies tag along.

In case you haven't figured it out, your old prop was a 13.5" diameter 15 pitch. Shouldn't be hard to find a replacement. I don't think the manufacturers make continent specific props. Though most aluminum props in the US tend to be black for some unknown reason.

jky
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Old 01 May 2011, 06:30   #3
Zan
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Country: UK - Scotland
Town: Glasgow
Make: Avon SR 5.4
Length: 5m +
Engine: 90HP Yamaha Outboard
Join Date: Mar 2009
Posts: 51
Nice one, cheers!

The old one seemed fine, just wanted to know if there was something I was likely to be missing with prop types since I'm new to all this. Replacement it is
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