I have a Mountfield Laser Omega 42 HP mower I've acquired recently which is
producing clouds of blue/grey smoke and dripping oil from the exhaust
silencer.

According to the sticker on it it's product code MP88901 made in 1995 with a
2.6Kw Briggs & Stratton engine.

I've only just got this mower and have no idea of it's history.

It seems to start easily enough but is either sucking oil from the sump and
burning it, or may have had a load run into the cylinder from improper
storage?

The oil level is between the dipstick marks, the fuel is fresh stuff and the
smoke / oil dripping is irrelevant of the choke position.

So far I've only run it for a few minutes due to smoking out the neighbours!

Does this sound like a seriously worn engine, or just accumulated oil in the
cylinder that should soon burn off?

If worn engine, what is the solution, will a new set of rings do it (does it
have any??) or is the cylinder likely to be excessively worn?

Thanks in advance,

Alan.



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Alan wrote:

I have a Mountfield Laser Omega 42 HP mower I've acquired recently which is
producing clouds of blue/grey smoke and dripping oil from the exhaust
silencer.

According to the sticker on it it's product code MP88901 made in 1995 with a
2.6Kw Briggs & Stratton engine.

I've only just got this mower and have no idea of it's history.

It seems to start easily enough but is either sucking oil from the sump and
burning it, or may have had a load run into the cylinder from improper
storage?

The oil level is between the dipstick marks, the fuel is fresh stuff and the
smoke / oil dripping is irrelevant of the choke position.

So far I've only run it for a few minutes due to smoking out the neighbours!

Does this sound like a seriously worn engine, or just accumulated oil in the
cylinder that should soon burn off?

If worn engine, what is the solution, will a new set of rings do it (does it
have any??) or is the cylinder likely to be excessively worn?

Thanks in advance,

Alan.

If it starts and runs fine, yet produces clouds of smoke, I doubt the
oils in the cylinder. If it were it would mess with the spark plug too
much. I'm more familiar with cars, and on a car engine the prime
suspect would be a gone oilseal on an exhaust valve stem. If B+S uses
the same sort of valve arrangement then this would be the no 1
suspicion. These seals cost pence, therye a rubber grommet that goes
round the valve stem, with a small spring wrapping round it to keep it
in place.


NT

wrote in message
ps.com...
Alan wrote:

I have a Mountfield Laser Omega 42 HP mower I've acquired recently which
is
producing clouds of blue/grey smoke and dripping oil from the exhaust
silencer.

According to the sticker on it it's product code MP88901 made in 1995
with a
2.6Kw Briggs & Stratton engine.

I've only just got this mower and have no idea of it's history.

It seems to start easily enough but is either sucking oil from the sump
and
burning it, or may have had a load run into the cylinder from improper
storage?

The oil level is between the dipstick marks, the fuel is fresh stuff and
the
smoke / oil dripping is irrelevant of the choke position.

So far I've only run it for a few minutes due to smoking out the
neighbours!

Does this sound like a seriously worn engine, or just accumulated oil in
the
cylinder that should soon burn off?

If worn engine, what is the solution, will a new set of rings do it (does
it
have any??) or is the cylinder likely to be excessively worn?

Thanks in advance,

Alan.

If it starts and runs fine, yet produces clouds of smoke, I doubt the
oils in the cylinder. If it were it would mess with the spark plug too
much. I'm more familiar with cars, and on a car engine the prime
suspect would be a gone oilseal on an exhaust valve stem. If B+S uses
the same sort of valve arrangement then this would be the no 1
suspicion. These seals cost pence, therye a rubber grommet that goes
round the valve stem, with a small spring wrapping round it to keep it
in place.


NT



NT, good thinking, I'll investigate. It starts on the first pull.




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On Thu, 14 Sep 2006 23:42:22 +0100, Alan wrote:

The oil level is between the dipstick marks, the fuel is fresh stuff
and the smoke / oil dripping is irrelevant of the choke position.

Has someone added oil to the petrol like one would do for a 2 stroke?

If you dig about on the Briggs & Stratton website you should be able to
manuals for your engine. You'll need the Briggs engine number and type
that is stamped on the engine somewhere rather than a mower model number.
The Briggs site has info on where to find the number(s).

--
Cheers
Dave. pam is missing e-mail

"Dave Liquorice" wrote in message
ll.com...
On Thu, 14 Sep 2006 23:42:22 +0100, Alan wrote:

The oil level is between the dipstick marks, the fuel is fresh stuff
and the smoke / oil dripping is irrelevant of the choke position.

Has someone added oil to the petrol like one would do for a 2 stroke?

If you dig about on the Briggs & Stratton website you should be able to
manuals for your engine. You'll need the Briggs engine number and type
that is stamped on the engine somewhere rather than a mower model number.
The Briggs site has info on where to find the number(s).

--
Cheers
Dave. pam is missing e-mail


Thanks, will look out the model number and then find the manual.

Alan.



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Alan wrote:
I have a Mountfield Laser Omega 42 HP mower I've acquired recently which is
producing clouds of blue/grey smoke and dripping oil from the exhaust
silencer.

According to the sticker on it it's product code MP88901 made in 1995 with a
2.6Kw Briggs & Stratton engine.

I've only just got this mower and have no idea of it's history.

It seems to start easily enough but is either sucking oil from the sump and
burning it, or may have had a load run into the cylinder from improper
storage?

The oil level is between the dipstick marks, the fuel is fresh stuff and the
smoke / oil dripping is irrelevant of the choke position.

So far I've only run it for a few minutes due to smoking out the neighbours!

Does this sound like a seriously worn engine, or just accumulated oil in the
cylinder that should soon burn off?

If worn engine, what is the solution, will a new set of rings do it (does it
have any??) or is the cylinder likely to be excessively worn?

Thanks in advance,

Alan.



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----= East and West-Coast Server Farms - Total Privacy via Encryption =----

1/. its running on 2 stroke mix

2/. It needs new valve guides and valves.

3/.Unlikely, it needs a new piston and cylinder as some asshole has let
it run out of oil and its siezed and damaged the bore/piston.

1/. its running on 2 stroke mix
I've flushed the tank with fresh fuel, so no to this one.

2/. It needs new valve guides and valves.
This sounds likely. Not yet sure if the guides are removeable - B&S
"classic" sidevalve engine.

3/.Unlikely, it needs a new piston and cylinder as some asshole has let it
run out of oil and its siezed and damaged the bore/piston.
Agree.

I'll pull it apart over the weekend and investigate.

Alan.

When I last had to change the blade on our mower ( don't have large pebbles
as borders ! ) I laid it on it's side for about an hour, it smoked for about
three cuts before it settled down again. Was it transported upright ?

Pete

"Pete Cross" 1@2 wrote in message ...
When I last had to change the blade on our mower ( don't have large
pebbles
as borders ! ) I laid it on it's side for about an hour, it smoked for
about
three cuts before it settled down again. Was it transported upright ?

Is there a side you're supposed to lean it on? On our honda, if you put it
on the wrong side, the oil leaks into the air filter.

(Having experienced the Honda, I'll never have another B+S engine)

cheers,
clive

"Pete Cross" 1@2 wrote in message ...
When I last had to change the blade on our mower ( don't have large
pebbles
as borders ! ) I laid it on it's side for about an hour, it smoked for
about
three cuts before it settled down again. Was it transported upright ?

Pete

It ws transported horizontally in the boot of my car from the previous
owner's to my house, however I don't know if he had it stored on it's side
for a while.

I'll run it for a bit longer to see if it clears before investigaing
further.

Alan.

(Having experienced the Honda, I'll never have another B+S engine)

I have a Honda engine'd generator - it seems a world apart in refinement
compared to the Briggs! However, the Honda is OHV and teh Briggs sidevalve,
so hardly a fair comparison.

Alan.

Alan wrote:
"Pete Cross" 1@2 wrote in message ...
When I last had to change the blade on our mower ( don't have large
pebbles
as borders ! ) I laid it on it's side for about an hour, it smoked for
about
three cuts before it settled down again. Was it transported upright ?

Pete

It ws transported horizontally in the boot of my car from the previous
owner's to my house, however I don't know if he had it stored on it's side
for a while.

I'll run it for a bit longer to see if it clears before investigaing
further.

Alan.

Same here - run it longer and it'll probably clear. Mine did similar
after I leaned it up to clean it.

cheers
Jacob