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Old 16 June 2013, 21:49   #1
Country: USA
Town: Gresham Or
Boat name: Money Pit
Make: Zodiac
Length: 4m +
Engine: in process
Join Date: Apr 2013
Posts: 11
Long shaft VS short shaft on an FC 470

I have been looking around for a motor for my FC 470. I have found a couple of good deals on 40hp long shaft motors. My question is, what difference will the long shaft motor make? I also have a friend who does lots of fabricating & could make a transom riser for me. Does the 5" longer shaft really make that big a difference?

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Old 17 June 2013, 00:44   #2
Tim&Linda's Avatar
Country: UK - England
Town: Crewe
Boat name: BLACK BOSS
Make: humber & searider
Length: 9m +
Engine: 2x200 ETEC & 2x40
MMSI: ex directory
Join Date: Jun 2013
Posts: 580
o yes it does two inches will make a difference , measure from the top of your transom to the bottom of your hull[ the v ] . then measure the engine bracket [ from where it will rest on the transom ] to the cavitation plate , [plate above your propeller ]
you can go one inch lower then the hull
but it will be great to hear from the pro s on here

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Old 18 June 2013, 13:22   #3
cgoing's Avatar
Country: USA
Town: Connecticut
Make: Zodiac
Length: 5m +
Engine: 75hp ETEC
Join Date: Nov 2009
Posts: 462
Fc 470

There is a thread for this exact subject I the north America section of the site.

Happy boating !!!
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Old 19 June 2013, 13:22   #4
Locozodiac's Avatar
Country: Other
Town: Lima-Peru
Boat name: Nautile
Make: Sea Rider Boats
Length: 4m +
Engine: Tohatsu 18 /30 HP
Join Date: Sep 2007
Posts: 1,706
If you place a long shaft engine on a short shaft transom will have exccesive water splashes over or out transom, all lower legs have different shapes, will depend on the manufacturer brand. Anyway, besides splash issues, will experiment exccesive water drag on tail which will slow you down..

Happy Boating
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