Advice needed please with Hayter mower

 


Can someone advise on my Hayter Harrier, started it today & straight
away it
started puffing out loads of smoke & smelt horrible, the smoke
soon burnt off &
mowed as usuall. When i came to restart it the pull
cord was very tight &
couldnt get a full pull on it.As soon as i took
the mucky spark plug out &
pulled the cord again it pulled nicely as
felt like it should.
I have unbolted the head & noticed the top of the piston has a large
round patch
of thick gunky dried oil on it, there are also two (what i
think are valves)
visible with the head removed, one of these is a clean
metal,the other is gunked
up with wet oil, can anyone shed some light on
what might have gone wrong here
as id like to repair it myself (if i
know what to replace)? Thanks in advance.




--
sarse

 


You haven't said what motor it is, but presumably it will be a good old
Briggs
& Stratton.
Knowing Hayter as being one of the better garden lawn mower
manufacturers if it
is a B&S it will be to an industrial specification
and not like some of the
engines they also make for the throw away
market.

My suggestion is to first of all, drain off the petrol tank and refill
it with
VERY fresh clean petrol.
Second, buy yourself a new spark plug.
Thirdly, take the air cleaner off and have a good look at it.  Is it a
sponge
filter and does it look to be well and truly full of muck?  If it
is, take a
small bowl, put a small amount of petrol in it and wash the
air cleaner out,
then do it again and then dry it.

Put the whole lot back together and your engine should now start and run
sweetly.




--
bigjimmy

 

sarse wrote:

Had you tipped the mower before the problem occurred?

 


Hi there,

As mentioned above, its a good possibility that you've tipped the mower
on its
side.  A 4 stoke engine like this has a wet sump of oil with an
Air Filter on
one side of the engine and an Exhaust on the other.  It
sounds very much like
you have tipped the machine on to its Exhaust side
and allowed engine to pass
through the open Exhaust Valve and in to the
Exhaust.

This would cause oil deposits on the piston / valves. However most of
that is
just down to age / use and happens to most engines after a
while.  The wet stuff
is what has been forced through when the machine
has been tipped over.  As the
exhaust box heats up it will burn off the
oil and should clear on its own.  Did
you notice any oil coming from the
spark plug hole when it was removed?

Again, as mented above, clean the air filter (if its the "sponge"
variety or
replace if its a paper cartridge type), replace the spark
plug with a new one
and while you have the head off its worth cleaning
the worst of the wet gunk
away prior to re-assembling the engine.

Re-fill the tank with fresh, clean fuel and check your oil level as this
will
have dropped due to the oil working its way through the engine.
And away you go
again...... in theory!

'Lawnmower World - The home of Quality garden machinery'
(http://www.jungle-busters.co.uk )




--
*Mechanic*