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26 September 2009, 14:21
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#1
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Member
Country: UK - England
Length: 3m +
Join Date: Jul 2009
Posts: 27
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Short Shaft / Long Shaft - Telling them apart?
Sorry for my continued novice questions, and thankyou to those with the patience to answer and not ridicule me for my lack of knowledge!
Searching for my outboard I find some people do not know if they are selling a short ot longshaft. I need a short shaft!
Google tells me all types of things thant dopn't help! Cavitation plate to Transom Clamo?!
Anyone please got a clear way I can tell if a small 3.5hp Outboard is Longshaft or short shaft when looking at it? Using terms that I will understand (prop, transom clamp and the like!)
Thankyou.
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26 September 2009, 16:49
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#2
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Member
Country: Other
Town: Lima-Peru
Boat name: Nautile
Make: Sea Rider 450 Rib
Length: 4m +
Engine: Tohatsu 5/18/30 HP
Join Date: Sep 2007
Posts: 1,998
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Hi,
This is a learn forum, nobody is born with knowledge, you get it while boating, so welcome to ask any out of this world tech issues not clear to you, to make it simple, this is a 20" long shaft Tohatsu 3.5 B2-L 2 stroke engine, the tail -- is 5" much longer than 15" short model. See pics for understanding.
There is also a UL 25" version, but normally used are 15" & 20 " shaft engines.
Happy Sibbing
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28 September 2009, 10:21
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#3
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Member
Country: UK - Scotland
Boat name: Wildheart
Make: Humber/Delta Seasafe
Length: 5m +
Engine: Merc 60 Clamshell
MMSI: 235068449
Join Date: Apr 2007
Posts: 4,671
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Pav,
There's a post here http://rib.net/forum/showpost.php?p=249948&postcount=4 that shows it nicely.
I guess form your post that the terminology isn't helping.....
The Cav Plate ("Anti Cavitation Plate" to give it it's full & proper name, AKA "anti ventilation plate") Is the flat piece of metal that looks like two small wings above the propellor. It basically helps to prevent air from the surface being sooked in & messing up the water flow over the prop.
The transom clamps are the two hooks with hand screws that are used to fix the engine to the back of the boat. Bigger engines tend to be bolted on , as 2 handscrews cant really grip hard enough to hold the power of a larger engine, and so the "clamp" is more of a mounting plate with a couple of small hooks, which are really just there to stop it falling off when fitting it. For the sort of size you're looking at the hand screws will hold it fine.
Hope this helps.
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29 September 2009, 11:49
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#4
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Member
Country: UK - England
Town: Sheffield
Boat name: Touch Bottom
Make: Avon
Length: 4m +
Engine: 50 hp Merc Power t&t
Join Date: Jul 2008
Posts: 288
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Quote:
Originally Posted by Locozodiac
Hi,
This is a learn forum, nobody is born with knowledge, you get it while boating, so welcome to ask any out of this world tech issues not clear to you, to make it simple, this is a 20" long shaft Tohatsu 3.5 B2-L 2 stroke engine, the tail -- is 5" much longer than 15" short model. See pics for understanding.
There is also a UL 25" version, but normally used are 15" & 20 " shaft engines.
Happy Sibbing
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Clear as mud.
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29 September 2009, 13:06
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#5
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Member
Country: UK - Scotland
Boat name: Wildheart
Make: Humber/Delta Seasafe
Length: 5m +
Engine: Merc 60 Clamshell
MMSI: 235068449
Join Date: Apr 2007
Posts: 4,671
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http://rib.net/forum/showpost.php?p=249948&postcount=4
Between the lines on the pic:
15" = Short shaft
20" = Long shaft
25" = Extra long
I think this is a global standard?
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29 September 2009, 16:52
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#6
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Member
Country: USA
Town: Oakland CA
Length: 3m +
Join Date: Feb 2005
Posts: 6,653
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Spot on, 9D280.
I know that's the standard for Yam and Honda. I always assumed it was industry wide.
jky
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30 September 2009, 00:11
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#7
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Member
Country: UK - Wales
Town: West Wales
Make: Vipermax 5.8, SR4.7
Length: 5m +
Engine: 150 Opti, F50EFi
Join Date: Sep 2005
Posts: 6,299
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Low hp motors tend to be 18" and 23", rather than 15" & 20"
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30 September 2009, 12:11
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#8
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Member
Country: UK - England
Length: 3m +
Join Date: Jul 2009
Posts: 27
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this is a great help. Thankyou for your contributions.
I've also found somep people refer to shortshaft as standard shaft... so it appears.
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30 September 2009, 13:09
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#9
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Member
Country: UK - Wales
Town: West Wales
Make: Vipermax 5.8, SR4.7
Length: 5m +
Engine: 150 Opti, F50EFi
Join Date: Sep 2005
Posts: 6,299
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Correct term is Standard Shaft (15")
Short shaft is 12", but you won't see many of these.
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02 October 2009, 14:11
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#10
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Member
Country: UK - Scotland
Town: stonehaven
Boat name: KISTRAND
Make: Herwa 18 tour
Length: 4m +
Engine: 75HP YAMAHA
Join Date: Aug 2009
Posts: 29
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Also you can ask the seller the model plate number this may also give you the the shaft lenght
there are loads of guides on how to read a plate and get size year and length
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