Dave Liquorice wrote:
And the filter being there or not even a proper one will affect the vacuum
and thus the mixture, though if it runs a lot better at highre revs
without the filter it is a pretty good indication that not enough air is
being allowed in.

Thanks, that's interesting.

Has the OP done a google on Teuschmesh(sp) engines? I wouldn't be
surprised to find the manual online somewhere.

I have... can't find anything for my specific engine, and the manuals that
are out there seem to show engines in quite different arrangements so don't
seem to be much help. There are a few people selling manuals on ebay but
they're not for the BVS series.

Theo

On 06 Aug 2007 13:09:59 +0100 (BST), Theo Markettos
wrote and included this (or some
of this):

And the filter being there or not even a proper one will affect the vacuum
and thus the mixture, though if it runs a lot better at highre revs
without the filter it is a pretty good indication that not enough air is
being allowed in.

Thanks, that's interesting.

Has the OP done a google on Teuschmesh(sp) engines?

Would that be the Alan Teuschmesh engine?
That little creep gets everywhere.




--
®óñ© © ²°¹°-°³

"Theo Markettos" wrote in message
...
'Mike' wrote:
Air filter VERY important. Clean that before you do anything else. The
machine demands air to run, blocked filter starves it of air. FULL STOP
ENGINE.

Spark plug almost as important. A wire brush will clean that and as a
VERY
VERY rough guide, the gap between the electrodes should be the thickness
of
a thumb nail.

I realised those - they were dirty but cleaning them was the first thing I
did when I started working on the mower I did toothbrush and meths
treatment on the plug - scraped away much of the carbon on it.

Though the clean and dry air filter sponge soaked up much more oil than I
expected... should I squeeze out as much oil as possible (to allow the
airflow) or is it better to keep some in (to collect bits of dust, I
assume)? I don't think it was originally very oily, but the previous
owners
of the mower did zero maintenance on it so that's probably not a guide.
FWIW in testing (on concrete, not cutting anything, not dusty air) I ran
it
with no air filter until I got it started.

I washed mine in petrol. Worked fine for the foam part.

Mine also has a paper part with rubber surrounding gasket. The paper part
was ok being cleaned in petrol but the rubber started to swell very quickly.
Lucky I got away with it.

Theo,

I recently carried out a full service on a tecumseh which had similar
problems to your symptoms. That one needed the valves ground in as the
owner had been running the mower on choke and the crap that had built
up was sticking the exhaust valve open making it run like a bag of
spanners.
Reground, rebuilt and showed the owner the correct way to operate the
choke (Turns out he had been starting and running on like that for a
year) and its been running like dream for the past three months with
no problems at all. Might not be your problem but worth checking.
Re- gap setting. If stuck I used to use a manila folder (Mainly for
Honda GX models) till I could get my hands on feeler gauges back at
the workshop - http://www.tool-up.co.uk/shop/diy/scan/se=7753/sf=cat
..

Hope this helps