Search found 3311 matches

by Oyster 49
Thu Jan 04, 2024 9:10 pm
Forum: General Topics
Topic: Can you work out what is wrong.
Replies: 6
Views: 24292

Re: Can you work out what is wrong.

I didnt notice the crankcase was replaced, nice spot Keith :P
by Oyster 49
Wed Jan 03, 2024 3:19 pm
Forum: General Topics
Topic: Marston OG rebuild
Replies: 18
Views: 79205

Re: Marston OG rebuild

Next job was the tank, which had some deep rust. So I decided to strip it back to bare metal and repaint it. The waterslide decals came from Sharpy, who also supplies John at SOS.
by Oyster 49
Wed Jan 03, 2024 2:51 pm
Forum: General Topics
Topic: Can you work out what is wrong.
Replies: 6
Views: 24292

Re: Can you work out what is wrong.

The engine mount bracket is incorrect, there should be two clamps, one securing the drive tube, the other securing the mount bracket. This is mine.
by Oyster 49
Mon Dec 18, 2023 11:01 pm
Forum: Help
Topic: What SD Bracket?
Replies: 10
Views: 40126

Re: What SD Bracket?

So, as Hugo says the big steel side mount, but they are very rare. I've been looking for one for 10 years! Early post war for a short period was the so called "Skeletal" then the beefed up bracket with the firstly alloy, then bronze clamps we know and love. Cash waiting for a original side...
by Oyster 49
Sat Dec 16, 2023 10:27 pm
Forum: General Topics
Topic: Marston OG rebuild
Replies: 18
Views: 79205

Re: Marston OG rebuild

Next job was to look at the tiller, which was slightly bent! A bit of gentle persuasion worked a treat here. Does anybody have any idea what the original tiller grips were?
by Oyster 49
Mon Dec 11, 2023 5:01 pm
Forum: General Topics
Topic: Early Brittannia Western Australia
Replies: 19
Views: 87859

Re: Early Brittannia Western Australia

Nice job 8) I have an identical engine on my rack thats been waiting to be looked at for 10 years. Must look at it next after the OG is finished.
by Oyster 49
Sat Dec 09, 2023 12:39 pm
Forum: General Topics
Topic: Early Brittannia Western Australia
Replies: 19
Views: 87859

Re: Early Brittannia Western Australia

Thats a great story :P and a great find too!
by Oyster 49
Fri Dec 08, 2023 5:49 pm
Forum: Wanted
Topic: Brittania part and question
Replies: 3
Views: 14651

Re: Brittania part and question

Heres a photo of my early BMB. The clip could be easily made from a piece of spring steel strip or similar. Do you want the actual dimensions? I also have a later BMB with the smooth exhaust casting and villiers magneto, but I suspect that part is different.
by Oyster 49
Wed Dec 06, 2023 9:25 pm
Forum: General Topics
Topic: Marston OG rebuild
Replies: 18
Views: 79205

Re: Marston OG rebuild

Next job was to give the crankcases a bit of a clean, and replace the tiller stub which had sheared. The original was made from monel, which is hard to find, luckily a brass SD one is identical. The treads in the crankcase for the tiller stub needed a light clean up by passing a tap through.
by Oyster 49
Wed Nov 29, 2023 5:16 pm
Forum: General Topics
Topic: Marston OG rebuild
Replies: 18
Views: 79205

Re: Marston OG rebuild

Next job was to investigate the gearbox, and would the end cap come off? I was hopeful as the FNR gearbox does not have the water pump behind the cap, so less chance of deep corrosion in the threads. Eureka!, it came off easily :D A full degrease and clean, and generally all in very good condition.
by Oyster 49
Wed Nov 29, 2023 5:11 pm
Forum: Wanted
Topic: OA Parts
Replies: 26
Views: 58151

Re: OA Parts

Is this worth looking at Bruce? oversize to standard diameter, and looks similar. Could it be the same, or a ver similar piston, that could be machined to make it fit? https://www.ebay.co.uk/itm/125723892288?hash=item1d45ba5a40:g:xZwAAOSwdRFjxrXw&amdata=enc%3AAQAIAAAAwDk8u5qXXnhLb2g68Im2UwjbIMLN...
by Oyster 49
Wed Nov 22, 2023 12:26 pm
Forum: General Topics
Topic: Marston OG rebuild
Replies: 18
Views: 79205

Re: Marston OG rebuild

Next job was to strip the magneto, all fairly routine as its the same as later engines. The coil was of course dead, but new ones are available. Its always a good idea to apply a little heat, as a steel thread in an alloy casting will most like be seized. I even have a tiny torch with runs on lighte...
by Oyster 49
Wed Nov 22, 2023 12:23 pm
Forum: General Topics
Topic: Marston OG rebuild
Replies: 18
Views: 79205

Re: Marston OG rebuild

A new piston could be made from solid bar of course.
by Oyster 49
Wed Nov 22, 2023 12:06 am
Forum: General Topics
Topic: Marston OG rebuild
Replies: 18
Views: 79205

Re: Marston OG rebuild

Can you get oversize pistons? I don’t recall ever seeing oversize blocks or pistons for any seagull? Could you look at Villiers engines from the 1930s that might have used a similar piston, perhaps with a bit of machining to make it fit?
by Oyster 49
Mon Nov 20, 2023 12:31 am
Forum: General Topics
Topic: Marston OG rebuild
Replies: 18
Views: 79205

Re: Marston OG rebuild

Yes, simple but clever. They did away with the FNR engines when they decided the reverse gear was rarely used and not needed and could save money. What a shame! The carb has a drain valve which is a great feature also.