What folding prop is this pls?

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9 years ago

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Cav30

NSW

122 posts

Cav30

NSW, 122 posts

29 Mar 2017 9:15am

This is on my cav. I believe you can get a tune up kit for it. We have been getting vibration at the stern. Engine mounts fresh. Engine aligned. Still vibrates.

To me it looks like a seahawk S4 2 blade slip stream??

~~http://www.seahawk.com.au/prodfolding.php~~

Many thanks
Ed

MorningBird

NSW

2711 posts

MorningBird

NSW, 2711 posts

29 Mar 2017 9:56am

Looks like mine, from memory, which is a Gori 2 blade folding. If it is it isn't tuneable but can be balanced if damaged.

PhoenixStar

QLD

477 posts

PhoenixStar

QLD, 477 posts

29 Mar 2017 9:28am

Gori has a hub anode, so Slipstream look right. Just a thought - do you have a 3 cylinder engine? Gear boxes have 1 extra tooth in one wheel to prevent wear patterns so the slight off ratio in the box with a 3 cylinder engine and 2 blade prop can set up harmonic vibrations that are almost incurable.

MorningBird

NSW

2711 posts

MorningBird

NSW, 2711 posts

29 Mar 2017 10:43am

Interesting. I have a 3 cyl Sole engine driving the 2 bladed prop. It is pretty smooth. The biggest problem was a poorly supported shaft which has been overcome.

Cav30

NSW

122 posts

Cav30

NSW, 122 posts

29 Mar 2017 11:13am

Yes that is very interesting Phoenix.
I do have a three cylinder engine.
Next haul out I will get the cutlass bearing checked and the prop / shaft balanced. If all is well then I guess there is nothing more I can do. I just want to be sure its not going to self implode and leave me stranded.

MorningBird

NSW

2711 posts

MorningBird

NSW, 2711 posts

29 Mar 2017 9:13pm

Just noticed the comment about hub anodes. Mine doesn't have one, we have one on the shaft forard of the prop.

Chris 249

NSW

3585 posts

Chris 249

NSW, 3585 posts

30 Mar 2017 10:34pm

It looks a bit like my old Kiwi Seastream.

The Seahawks look the goods. Our new boat has a Kiwi three-bladed feathering prop, which gets mixed reviews.

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