Restoring a Marston OA

[Nudge]

Was quite exciting when the vaporised grease/water in the box, squirted out under great pressure and ignited
Big ball of flame.

That will be the salt in it that will act like an oxidizer along with the water starting to boil.... Don't put water on an oil fire trick!

Will try more heat, don't want to melt it.

Ever tried to melt Aluminium in the open air? it takes a lot of heat! You may get it soft and break a lump off it, but I don't think you will melt it.

[Horsley-Anarak]

Ever tried to melt Aluminium in the open air? it takes a lot of heat! You may get it soft and break a lump off it, but I don't think you will melt it.

It was the thin edge that I was worried about, my propane torch is quite big.

Managed to get it apart

I was also able to use the bush to chase the threads at the open end, tapped the aluminium back in a bit then back and forwards with the bush to chase the thread.

Will have another go with the help of a battery drill to improve the threads where the cap fits, that means now I will need to make a new cap, screw cutting a fine left hand thread in ali, should be interesting.

H-A

[Charles uk]

Nice work on that thread H-A!

Your braver than me.

[Oyster 49]

Yes, quite a difficult job those gearboxes. I’m planning on leaving my OG gearbox assembled!

[Horsley-Anarak]

Bored out the bearing that had been replaced at sometime.

Made a new bearing, not sure what the bronze is but it is very hard, could be Aluminium Bronze, swarf was coming off blue.

squeezed in the new bearing, now just need to bore and ream.

H-A

[Horsley-Anarak]

Removed the rear bronze bush, used a bit of 10mm studding and a couple of nuts with a just under 3/4" sleeve.
made lots of graunching noises on the way out.

Machined a new bush and reamed it to 1/2", will wind it back in the way it came out.

Crown wheel is a little odd, keyway and also a pin through the propshaft to hold it on.

H-A

[Nudge]

Nice!

[Oyster 49]

Any more updates H-A?

[Horsley-Anarak]

Sorry new toy

Outboards a little on the back burner, but did look at it a couple of days ago, should get it going.

Did mention to Charles, that we should have a Marston meet on the Thames this year, usual venue.
Last one to the pub buys the beer.

https://youtu.be/jPA8ySSR40Y

Could have OA class, ON and OJ class, or even a twin class ( if it is back together)

Looking forward to better weather, no joking aside a Thames meet can be organised, low stress run to Seagull then to the pub.

H-A

[Oyster 49]

That is a toy for sure one of those new fangled water cooled models!

[Charles uk]

Can a tow-bar be fitted to one of those?

Is there room for a Seagull or do you have to remove the passenger seat?

[Oyster 49]

To change the alternator you access it via a panel behind the drivers seat!