WW2 SD nearly finished

[Double Dutch]

Hello Seagull friends,
summer is nearby, so it's time to get the good old seagulls running.
My SD has been running for the first time.
I set the ignition at 22,5 dgr BTDC with a point gap of 0.4mm, which seems to wide.
The points are closed for only a short time.
This is maby the reason she runs very uneven at higher revs.
I let her run in a dust-bin ( Seagull test base) with the clutch free.
With the clutch engaged for a short time, she gave me a fresh shower.
See the attached pictures and the those at my previous topic about this SD.

Before

[charlesp]

Looking very good indeed!

[Double Dutch]

Thanks Charles

[Double Dutch]

The other side

[Double Dutch]

Some more details.
Feel free to leave some comments.
I have to make an air intake and the wingnut for the tiller.
If someone can offer me the original throttle lever I would be very pleased.

[Oyster 49]

That's a super job, I hope you are very pleased with it. I managed to obtain a throttle lever for my engine my buying a 40 plus on ebay that I noticed had a SD lever. I'm still looking for a bronze clutch lever.

I would be interested to know what paint you have used for the tank, and where did you get the tank decal from?

Excellent restoration, and it gives the rest of us something to aim for

[Oyster 49]

I forgot to ask, are the tank straps new, or have you refinished the old ones?

[skyetoyman]

Just waiting for my SD to arrive from N . Devon. Engine was cheap - carriage wasn't . You have set the bar so high with this machine. Mine also has a "modern trottle lever.
Well done that man

[skyetoyman]

gold tranfer is available on fleabay http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... K:MEWNX:IT
Not sure how good

[Double Dutch]

Hello Oyster49,
the paint is from Motip, an automative paint in spray cans.
I am very pleased about de decal set from Sharpy at ebay.
After the decals where fixed I applied a coat of clear varnish.

The tank straps were with the engine and sink plated.
They are believed the original
At my other topic about this engine you will find a close-up picture.
If you want to sell your throttle lever please let me know.
For the clutch lever I think you will find one in Holland, I can ask for you if you like.

[woodbutchergraham]

Well done Mr Double Dutch a cracking job on your SD, My own SD also has a captive nut instead of a wing nut for the tiller arm. I’m hoping Charles P will inform me that this is the original and then I won’t have wasted my time cleaning the rust and crud off it. also may be can we have a definative answer on the type of prop that was on the SD? I have lots of questions but short on answers , hope the team can help
all the best Graham

[charlesp]

The wing nut is the original fitting. So is the prop shown in Double Dutch's finished motor, the 2 blade swept back one. In my opinion it's the most attractive of the blades with a prop spring.

All the SD motors started life with the 'coolie hat' domed magneto, and as far as we can make out had an unplated brass exhaust, a zinc plated or zinc dipped drive shaft casing, and a carburettor ring clamp round that casing as a depth adjuster. There is a faint possibility that some had a flat magneto, right at the end of the series.

Most seem to have had the copper magneto cover, some refer to it as 'Naval' but I simply don't know.

The transom brackets are another mystery. I remain convinced that the bronze skeletal bracket was fitted to a small number - very few - while the great majority were issued without, rather they were attached to the odd fabricated side mounted things that look as though they were originally made out of angle iron. Quite a few from the Netherlands now have a robust bronze bracket that we don't usually find over here.

Skeletal type bracket
http://www.saving-old-seagulls.co.uk/i_ ... %20102.jpg

[Charles uk]

I agree with almost everything the other Charles has written except the copper coolie hat.
Coolie hats from 1932 onwards were aluminium, right throughout the complete Marston range, the only copper ones found were on SD's & more often than not, seem to be on the SD's that had bronze gear levers,of the SD's that I've seen or owned less than 15% had copper coolie hats, whilst there is a certain amount of logic behind the statement that only the naval SD's were fitted with these 2 items, no evidence has surfaced yet to back this up.

In fact not one wartime photo of an SD has appeared, unless you know different.

[Double Dutch]

I changed the ignition points gap from 0.4mm to 0.25mm and timed the setting again to 22.5 dgr BTDC.
Today it was the moment of truth, at the 2nd pull she was running very well, also at higher revs.
She gives a good flow of cooling water through the tell tale hole where the cooling pipe meets the exhaust tube.
At high revs, she gives a water flow through the two holes halfway the driveshaft tube.
I am not sure this is OK. maybe there is too much play at the bottom bearing, which I didn’t noticed, when I had the engine in pieces.
I can’t remember my TC 102 gives water there.

[Double Dutch]

The good old Seagull SD out for a life test.
She started at the first pull and performed very well.
The boat is hired, as my Sunshine is not yet ready.
I had my AP ( Advanced Products ) with a 70cc JAP engine as a back up on board, but didn't need her.