T300 update

I see the thread has dropped off my Radar, so I'll start another ;o)) Having
decided to take my marine engine walkies to the 1000 Engine Rally, I thought
I'd better get cracking and make it look more respectable.
If ever there was an overcooled engine, it must be the Norman T300. The
whopping great uncowled fan moves birds in flight, stops cyclists passing by
in the road (true! they wanted to know what the wind was!) and at least at
off load speeds the crankcase is still only warm after a whole days running.
Having Gunked the engine down the evening before, I took off the petrol
tank, carb, exhausts and flywheel yesterday and cleaned everything within an
inch of its life - stripped the carb, cleaned it inside and out, painted up
the induction cover and choke arm, rubbed down the tank and marked it up for
bracket brazing and gave it a quick whip over with primer. Then I ran a
brass wire cup brush over the engine, removing the years of aluminium oxide
that was previously hidden by the years of oily shite. There were occasional
fragments of grey paint hiding in corners and I mulled for some time over my
next step. Finally, I decided that this one would be displayed in its naked
aluminium splendour and having wiped it all over with a meths laden kitchen
tissue, gave the now somewhat brighter surfaces three coats of clear
lacquer. That should insulate both steel and ali from the vicissitudes of
the British climate for the foreseeable future and subsequent owners will be
able to find original paint traces under the protective acrylic.
I discovered a rather home made looking aluminium spacer twixt carb and
crankcase. It's true the spacer is in the right place to be an insulating
washer (if 'twernt made of ali) and perhaps it replaces one as they don't
get hot and bothered. In this context, I was interested to find a venturii
milled into the inlet tract that decreases the bore by about half . There is
facility for the carb to be mounted at 90o to the current position. I assume
this feature is actually a carb. flange option and doesn't mean you can bolt
the engine to a vertical face which would make the then lower cylinder very
gloopy indeed ;o))
The tank is one of those pretty little oval containers from a JAP outboard
engine. It was blue when I got it and I'm inclined to repeat that colour
rather than my normal "paint it deep gloss black" approach that I've
inherited from years of Velocettes and Vincents!
The magneto seems OK and is an Air Ministry stamped item, producing the
customary bolts of lightning that such mags provide. I'd previously faced
the points off, so contented myself with just cleaning the slip ring and
brush holders. A quick run over with the now thinning brass cup brush (£2.00
at my local tool shop) and a coat of lacquer & it's ready for refitting
later today.
Kim Siddorn
Reply to
J K Siddorn
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Mine also has the 'home made' spacer betwixt carb and crankcase. It is also made of ali although I'm not sure that it was actually home-made. The finish isn't quite up to the standard of the rest of the engine but it's pretty good. Do you think this may be a standard feature?
My engine is also a version of battleship grey but I think it was applied with a creosote brush - it's definitely not original. Is there such a thing as an original colour for a T300 (other than the olive-drab forces chargers etc)?
Reply to
Mark Howard
Mine has a couple of fiber spacers approx 5/16" each
Reply to
Nick H
Yes you! SEM around issue 95-100
Reply to
Nick H
I think I've found the serial number (no plate on this one) stamped on the side of the base flange, TE 1477
Anyone got dating into??
Kim Siddorn,
Reply to
J K Siddorn

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