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2 blade folding prop had its day


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#1 rossd

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Posted 07 May 2019 - 08:11 PM

For the last little while only 1 blade has been coming out and have had to blip the throttle to get the other one out. But few days ago it wouldn’t come out even after a couple of rev sessions. In the end stuck it in reverse and then forward and all ok. I think the vibration did some damage to the shaft strut as leaking a bit now. The lesson as always is lack of proactive maintenance will always come back to bite you on the bum. Need another prop, geared folding 2 blade should do the trick. Yanmah 25mm shaft. Existing is 13.5x9 LH , handbook says 13x8.5 and previous paperwork mentions 14x8 so some wriggle room. Anyone got anything or know likely prospects? Thanks
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#2 raz88

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Posted 08 May 2019 - 07:10 AM

https://www.trademe.co.nz/2047246717

That looks like a possible?
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#3 wheels

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Posted 08 May 2019 - 10:46 AM

Why do you need a new one though. Surely a clean and lube should sort it.
Also, unless you have a continuation of vibration even with the prop blades out, the shaft should be OK. If the gland is just a stuffing type, simply tighten up the gland a tad.


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#4 waikiore

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Posted 08 May 2019 - 11:18 AM

That is a saildrive prop


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#5 rossd

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Posted 08 May 2019 - 01:34 PM

Razz88. Sail drive quite different. A spline rather than taper.
Wheels. The blades are as sloppy as. It would need a new pin, rebushed and machined blades etc. could be done but also times a problem as no facilities here other than putting down on the boat ramp between tides. I think the shaft, stern tube and gland are ok. It’s the oddball setup where the shafts off the centre line off the boat and has a seperate support strut , which is what took a beating.
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#6 rossd

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Posted 08 May 2019 - 01:38 PM

Found this listing but wrong hand also boss suspect

https://www.trademe....-2047249180.htm
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#7 ex TL systems

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Posted 08 May 2019 - 10:03 PM

I have a Volvo 3 blade folder on a 25 mm shaft 380 mm diameter ot so 500 with shaft. In New Plymouth though was on a yanmah 30
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#8 rossd

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Posted 09 May 2019 - 08:17 PM

3 blades would be cool. Unfortunately 380 or 15 inch will be to big I already have a clearance problem with rudder on full lock.
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#9 rossd

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Posted 28 June 2019 - 08:39 PM

Bit the bullet and got a new one. Surprised they said a geared one is no more efficient than floppy so floppy it is. What’s the E 19 mean? Also with prop speed it says sand 80 grit so does that mean sand of that nice polished surface?. Do you propspeed the shaft anode?

Attached Files


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#10 Frank

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Posted 29 June 2019 - 05:02 AM

That is a Bri Ski Prop and I thought they went out of business years ago ? I found the geared unit was better in reverse, its a Briski on my saildrive and it has given good service.


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