In article et,
says...
On Sat, 8 Mar 2008 09:42:47 -0000, Charlie Pridham wrote:

I guess you could also get overheating from an incorrect fuel air
mixture.

The pink valves indicate over heating but that normally affects exhaust
valves not inlet. Black deposits on the head stikes me as indication of
the mixture being a bit rich but that is contra indicated by hot valves
which are normally associted with the mixture being lean...

These carbs are horribly simple maybe idle is rich and running lean? They
can also be right beggers to set up if one of the jet adjusters has been
screwed in two hard and deformed the needle or seat...

I solved the problem by taking the mower to the dump and never buy
mountfield again!

Why single out Mountfield? The majority of non-honda engined stuff has B&S
engine...


Well it was 25 years ago now! but I was incensed that they chose to put
an engine on one of their larger machines that was not fit for purpose,
it would only work on flat lawns according to mountfield, something they
had avoided mentioning before I bought it, they then refused to rectify
the situation, either repair or replace, nor did they offer to compensate
for the costs of repairs which ran to hundreds of pounds, so although I
am aware that the newer B&S engines are fine, and that mountfield are
probebly no worse than much of the other kit being sold, I personally
would not have one of their machines as a gift never mind paying for it.
--
Charlie Pridham, Gardening in Cornwall
www.roselandhouse.co.uk
Holders of national collections of Clematis viticella cultivars and
Lapageria rosea