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Old 27 October 2010, 12:22   #1
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Yamaha 8hp Short to Long Shaft Conversion

Hi, seeing as good 2 stroke engines are like hens teeth I was wondering if was possible to convert my Yamaha 8hp from short to long shaft.

Does anyone know if it can be done and if so where I could get the parts from.

Thanks.
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Old 27 October 2010, 15:41   #2
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Originally Posted by thomas View Post
Hi, seeing as good 2 stroke engines are like hens teeth I was wondering if was possible to convert my Yamaha 8hp from short to long shaft.

Does anyone know if it can be done and if so where I could get the parts from.

Thanks.
Yeah go to Bay manufacturing in the states, they do long shaft kits for all sorts of engines.

http://www.baymfg.com/
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Old 27 October 2010, 16:41   #3
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Excellent, cheers.
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Old 28 October 2010, 03:57   #4
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Alternatively find a siezed longshaft & buy the bits. (probably more hassle for you than turbo's suggestion).

At a guess you'll need the long version of leg, drive shaft, water tube & gear change rod.

Some older engines (from the 60s & 70s, a few crept into the 80s) used an insert / spacer at the bottom of the leg. With that you would need the spacer instead of the long leg casting. (which is an easier conversion, as you don't need to take all the clamp / swivel gubbins off, just drop the gearbox & replace the bits.)
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Old 28 October 2010, 09:38   #5
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Mine's not too old, mid 2000, the gear box drops off and I need to then fit a spacer in between then get a longer gear linkage, shaft etc.

I've spoken to a dealer and I could use anything from the beginning of the 80's onwards.
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Old 05 November 2010, 10:26   #6
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Update

I got a quote for an extension kit from the states, 280 shipped but not including import duty.

Price from Yamaha for a new leg, shaft, tube, gear shift and all the seals and gaskets - 200 to my door - much more work involved but cheaper and neater.
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Old 07 November 2010, 06:39   #7
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I could be way off the mark here (imagine!) but looking around this last while I've noticed that short 8hp Yammies are selling for a touch (100-150?) more than their long shaft brothers...

Have you considered flogging yours, buying a long, trouser the difference and save the cost of the conversion? (potentially saving you 350)

Nice cheap one (granted, It's a Long Way to Tipperary)
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