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Message |
    
Dennis Stapleton
New member
Username: kingstapo
Post Number: 1
Registered: 10-2013
| | Posted on Sunday, October 27, 2013 - 05:26 pm: | 
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I have a 16 ft putter with a twin blaxland that I cast new heads for in SG iron and and gunmetal inlet and exhaust bo etc . I restored the boat and left it in the shed for two years it dried out .when I put it back in the water it leaked
I read that it needs to swell up ..so I filled the bottom of the boat with water over a few days
On saturday I forgot the tap was on and filled it to much .The water was up over the engine and the magneto was almost submerged ..only like 20 minutes or so
Any ideas what I need to do ?
And if anyone wants to buy a boat let me know
now it will not start  |
Andrew Munns
Senior Member
Username: johnoxley
Post Number: 100
Registered: 04-2010
| | Posted on Sunday, October 27, 2013 - 06:27 pm: |
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Dennis - If 20 mins fresh water, not much of a problem, but you need to get water out and oil in. If water got into the motor, keep wet until you drain it out and pour in some oil through plugs. Grease main bearings are designed to keep water out. Turn the grease cups. Open crankcase drains and expell any water. Messy job so need trays, rags in bilge. Drain any water from carby. Magneto must be opened and dried out in a warm place. May need to clean points and prove it will spark. Restart will be smokey, but should be OK.
Salt water is much worse - Just did 2 by 8L3 Gardners that had been under for 3 months. Alternators had turned to toothpaste, but we stripped motors and got to the journals as they just started to rust. All good. Even starter motors and relays survived. |
Andrew Munns
Senior Member
Username: johnoxley
Post Number: 101
Registered: 04-2010
| | Posted on Sunday, October 27, 2013 - 06:32 pm: |
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PS - oil up any thrust/shaft bearings if fitted.
Then - What did you do for cylinder patterns for the 5-7. Mine is going in a 14' boat. Usable cylinders, but I would like to cast up 2 new pots in say NiResist for future, plus I have a friendly foundry... |
Dennis Stapleton
Member
Username: kingstapo
Post Number: 5
Registered: 10-2013
| | Posted on Monday, October 28, 2013 - 07:03 am: |
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hello Andrew
the boat was on that cradle in the picture
and rolled onto the muffler side
the water didnt get into cylinders
or the sump
I think the problem is no spark from magneto
in regard top cylinders
these engines have a water jacket inside and a small channel to do with two stroke
plus the main bore
when casting these cavities are formed with sand cores ..made in complex core boxes
a core is sand held with resin
when the metal encapsulates the core it gives off heaps of gas ..which must pass through the metal or you get a blow hole
the core is also held in place by a chaplet to stop it shifting ..this often is where these cylinders give way ..on the side where the chaplet failed to bond into the metal
In the old days they would pour these cyclinders from metal produced in a cupola and the metal was high in carbon and very fluid
they would add phosphorous to iron to pour thin sections like bathtubs lace work etc
we had a cupola ( i dont think anyone has them anymore ) and then changed to electric the iron is not as fluid so casting is difficult
Ni resist is made by adding Nickel to the iron
aprt from being impossible to cast that section thickness ..it will be brittle and extremely hard if not impossible to machine
I cast the heads in this boat /..from old patterns made by AUB Rose
I carved my nickname into the heads when cast
the iron is SG iron ..so you cannot break this cylinder even with a sledge hammer
the trick with SG is to increase the silicon content to over 3 %
They will not rust and flake and wear like high carbon iron
the engine box and inlet are made from Gunmetal |
Greg Y
Senior Member
Username: gregoryan
Post Number: 113
Registered: 09-2004
| | Posted on Monday, October 28, 2013 - 07:40 am: |
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Wow its not every year that one hears this caliber of pattern making/ casting/ & metallurgy tech ! I�m sure you�re a rare one! |
Dennis Stapleton
Member
Username: kingstapo
Post Number: 6
Registered: 10-2013
| | Posted on Monday, October 28, 2013 - 08:18 am: |
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26 years of hell .. |
Andrew Munns
Senior Member
Username: johnoxley
Post Number: 102
Registered: 04-2010
| | Posted on Monday, October 28, 2013 - 05:16 pm: |
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Thanks Dennis, Interesting use of SG Iron. We cast the new circ pump for steam tug Waratah some 25 years ago. The old pump could be carved up with a butter knife, but the NiResist is avoiding corrosion well (salt water pump for cooling condenser). Warmans made the pattern and casting. The pump was machined on a horizontal borer with TCT tooling. More recently we have made patterns for Frisco Standard heads and barrels and had these cast at Wallbanks. Great job. Metal pours and machines well and we use this foundry's work for pistons, cylinders and all sorts of jobs. Had a head cast at Jackson, who had a cupola, but are now closed.
So does anyone still have patterns for Blaxland pots? |
Dennis Stapleton
Member
Username: kingstapo
Post Number: 7
Registered: 10-2013
| | Posted on Tuesday, October 29, 2013 - 07:48 am: |
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Old Aub Rose had patterns in the Foundry .he also had about 85 brand new Magnetos at his house in Gymea and a ton of lathes and other things engines thousands of spares etc at his factory at Kirrawee
I have no idea what happened to it all. He died ..and I had left the foundry prior to that .maybe they still have the patterns ?
I used to make him engine boxes inlets pots clutch parts bases exhaust clamps the parts on the shaft ..he had patterns made for just about everything
Bit of skill required to make the pots with intricate core work
I doubt if they bothered making them after I left |
Todd Vidgen
Senior Member
Username: todd_vidgen
Post Number: 245
Registered: 03-2008
| | Posted on Tuesday, October 29, 2013 - 04:07 pm: |
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Brett Jacobs purchased it all as a job lot |
Andrew Munns
Senior Member
Username: johnoxley
Post Number: 103
Registered: 04-2010
| | Posted on Tuesday, October 29, 2013 - 06:25 pm: |
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So... Just what is out there? Heritage Fleet was given John Forrest collection of patterns and booklets (via the late Tim Mulvey). These patterns are stored with the Heritage Fleet patterns, but Tim passed away before they were catalogued. Ken Bryant ex Warmans patternmaker who volunteers for HF made patterns for a 6' Frisco head and barrel. ANMM has the Wally Moss patterns for the same series of engines.
I visited Aub many years ago - His jig for welding 5-7 cranks was interesting plus his bore grinder that could taper a cylinder 1/4 thou smaller at the top was superb. |
