| Author |
Message |
    
Rob Cook
Member
Username: rob_cook
Post Number: 12
Registered: 03-2011
| | Posted on Sunday, August 05, 2012 - 07:07 pm: | 
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Hopefully not wearing out my welcome here.
To round out my display collection of Blaxland engines I am planning to make a cutaway SXT single so that people can understand the simplicity and brilliance of the two-stroke engine and, of course, the ingenuity of Australian engineering.
Does anyone have a surplus engine, or parts thereof, for one of these?
One with a blown water jacket would be suitable and crankshaft clearances and bearing condition are unimportant. I have a connecting rod and piston left over from the twin (it runs as a single due to a cracked rear cylinder.
Happy to pay transport but no real budget for purchasing parts so hoping for generosity.
Rob Cook |
neil r jones
Senior Member
Username: senojn
Post Number: 99
Registered: 08-2006
| | Posted on Monday, August 06, 2012 - 12:53 am: |
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Just for information there was a beautiful cutaway of a Blaxland Twin including clutch, shaft and prop at the premises of St George Motors Princes H'way Arncliffe (Blaxland Motors)in the 1970/80's.
Goodness knows where it is now.It was eyecatching and did indeed show the simplicity ,brilliance and ingenuity of Australian engineering ! |
rob j gorman
New member
Username: fella
Post Number: 1
Registered: 08-2012
| | Posted on Tuesday, August 14, 2012 - 06:24 am: |
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Hey ,,, this is my first post so be genntle on me,,, A mate and I have aquired an old clinker and we need some parts,,, we have a blaxland 3.5 hp (pup) but need cllutch parts AND Rudder and bearing to shaft through floor,,,,,,,,,,,and prop,,,,,,,,,some pics of cluth parts would surfice as we have some (not the handle section )attatched to motor,,, Thanks FELLA |
Allen
Member
Username: allenf
Post Number: 21
Registered: 02-2011
| | Posted on Wednesday, August 15, 2012 - 09:51 pm: |
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Rob,
Can you post pictures of your rig?
Do you have a propeller shaft and if so what diameter is it? You need a propeller to fit your shaft and the stuffing box to fit that shaft also to keep the water out.
Size and pitch of propeller is important as is the length of the shaft if your looking for one.
I had a Fitter and turner knock up a coupling for motor to clutch.You need two,one each end of the dog clutch?
It might be easier to go to a boat yard to find second-hand bits. Small yachts with inboard motors often go out of commission.
The chandleries at these yards sell them new for an arm and a leg.
The rudder too is relevant to the size of your boat.
Make one to suit your boat.
A boat without a rudder..MMMmmmmm. sounds familiar.poor lost souls. |
rob j gorman
New member
Username: fella
Post Number: 3
Registered: 08-2012
| | Posted on Thursday, August 16, 2012 - 06:52 pm: |
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boat yard sounds interesting,,, |
rob j gorman
Member
Username: fella
Post Number: 4
Registered: 08-2012
| | Posted on Thursday, August 16, 2012 - 06:57 pm: |
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WE just need the YOKE/handle part for clutch,,the rest is there,,It must have 20mm travel in prop shaft ? for it to operate? |
Andrew Munns
Senior Member
Username: johnoxley
Post Number: 68
Registered: 04-2010
| | Posted on Thursday, August 16, 2012 - 11:34 pm: |
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I have a clutch handle you can have - Sydney location. The other bits could be made from stock sizes if you have access to a decent workshop. |
Allen
Member
Username: allenf
Post Number: 22
Registered: 02-2011
| | Posted on Sunday, August 19, 2012 - 07:37 pm: |
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It must have 20mm travel in prop shaft ?
The whole propeller shaft goes back and forth as you engage and disengage the dog clutch approx 20-30mm. Depending on the design of the boat,this means the propeller could potentially touch the rudder when disengaged.
Also as the propeller turns it drives the clutch into the engage position and pushes the boat along
CAUTION. When you buy your propeller. There are right handed and left handed propellers.You need to determine which way your motor runs.
 |
john fuller
Member
Username: scooter
Post Number: 18
Registered: 07-2011
| | Posted on Sunday, August 19, 2012 - 08:18 pm: |
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Hi ive been wondering about this, i get that the forward engagement locks the clutch with the pressure generated by the prop, but what happens in reverse, does the prop pressure pull the clutch apart ? |
Laurie Derwent
Senior Member
Username: laurie_d
Post Number: 121
Registered: 10-2009
| | Posted on Monday, August 20, 2012 - 12:27 am: |
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Folks, Sorry about the tardy reply but I understand Brett Jacobs had/has all the old St George Motors 'stuff' as well as most of Aub Rose's. Cheers Laurie. |
Laurie Derwent
Senior Member
Username: laurie_d
Post Number: 122
Registered: 10-2009
| | Posted on Monday, August 20, 2012 - 12:42 am: |
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ps. At least for the Blaxlands I have had the clutch has to be held forward when running in reverse because the prop does pull the shaft back as suspected by John. Regards. |
Allen
Member
Username: allenf
Post Number: 23
Registered: 02-2011
| | Posted on Monday, August 20, 2012 - 08:16 am: |
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EDIT > I might be thinking about the twin motor which runs both ways.
There are right handed and left handed propellers.
You can choose . I have had both with Blaxland.
I prefer drive into engage.
I think they were released from the manufacturer the other way around. |
Allen
Member
Username: allenf
Post Number: 24
Registered: 02-2011
| | Posted on Monday, August 20, 2012 - 09:14 am: |
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John what happens in reverse, does the prop pressure pull the clutch apart
The propeller does pull a dog clutch apart when engaged but a dog clutch does not have reverse, you need a gearbox for reverse.
Interestingly,if you slip the clutch for easing up to the dock, the dog clutch wears out quickly and it can start slipping continually, making it hard to make way.
Don't slip your clutch! Slam it into gear and leave it. It is a bit of a guessing game when to disengage when nosing up to the dock. Good fun..Use the current or the wind and drift up or oars or all the above,but don't slip the clutch.
Dog clutches only work for forward motion. |
john fuller
Member
Username: scooter
Post Number: 20
Registered: 07-2011
| | Posted on Monday, August 20, 2012 - 09:40 am: |
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Hi unless you have a super pup. Runs forward and revers by turning the magy when about to stall. No gearbox. Change engine rotation. Neet stuff. |
