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Posted by John on June 22, 2008, 5:29 pm
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I know this is slightly off topic as the engine's in a mower but I
recently bought an ex demo Bolens lawn tractor. It looked imaculate, I
suspect it had never cut any grass. Anyway, it came off eBay for about
1/2 price and worked well so I was happy. It has a 13HP Techumse
engine and replaced an old Sears mower with a B&S that worked well for
many years until the back axle snapped.
Anyway, the new one was put to work and all was wonderful. Then it
began hunting slightly and its 13 horses seemed a little lame. Over
the next few running hours things got worse until it would only run on
full choke. Cleaning the carb and plug only seemed to make matters
worse until it ran no more. Further cleaning of the carb changed
nothing. The engine would only start with my hand covering most of the
carb mouth or with petrol dripping from a brush into said carb mouth.
By now I'd had the carb in bits more times than I can remember and
grudgingly admitted defeat by taking it to my local mower company,
muttering unprintables as I did so.
When I bought the mower, it came without any paperwork except a rather
nondescript receipt. Fortunately that was enough to prove it's date of
purchase so it should be under guarantee.
The agent says it needs a new carb. I suppose at =A365/hr, it's cheaper
than paying them to fiddle with it. Techumse are considering the
warrantee claim but the good news is a new carb is only about =A335. I
assume there's VAT on that but it's still less than I expected. As a
comparison, my smaller mower needed some drive belts. For some reason,
MTD seem to have them made to their own spec. They cost =A330 each! Now
I've got the part Nos, I can get them of the 'net for about 1/3rd
that.
In the meantime, the grass is loving this weather and is growing like
crazy. Does anyone rent out horses or sheep?
John
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Posted by moray on June 22, 2008, 6:14 pm
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I know this is slightly off topic as the engine's in a mower but I
recently bought an ex demo Bolens lawn tractor. It looked imaculate, I
suspect it had never cut any grass. Anyway, it came off eBay for about
1/2 price and worked well so I was happy. It has a 13HP Techumse
engine and replaced an old Sears mower with a B&S that worked well for
many years until the back axle snapped.
Anyway, the new one was put to work and all was wonderful. Then it
began hunting slightly and its 13 horses seemed a little lame. Over
the next few running hours things got worse until it would only run on
full choke. Cleaning the carb and plug only seemed to make matters
worse until it ran no more. Further cleaning of the carb changed
nothing. The engine would only start with my hand covering most of the
carb mouth or with petrol dripping from a brush into said carb mouth.
By now I'd had the carb in bits more times than I can remember and
grudgingly admitted defeat by taking it to my local mower company,
muttering unprintables as I did so.
When I bought the mower, it came without any paperwork except a rather
nondescript receipt. Fortunately that was enough to prove it's date of
purchase so it should be under guarantee.
The agent says it needs a new carb. I suppose at £65/hr, it's cheaper
than paying them to fiddle with it. Techumse are considering the
warrantee claim but the good news is a new carb is only about £35. I
assume there's VAT on that but it's still less than I expected. As a
comparison, my smaller mower needed some drive belts. For some reason,
MTD seem to have them made to their own spec. They cost £30 each! Now
I've got the part Nos, I can get them of the 'net for about 1/3rd
that.
In the meantime, the grass is loving this weather and is growing like
crazy. Does anyone rent out horses or sheep?
John
MTD belts are an oddball width from what I remember.
From memory, a standard B-series belt will fit, but it'll slip under load,
wearing out the pulleys as quickly as the belt.
Out of curiousity, where can you get them for a 1/3rd of the normal price?
moray
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Posted by John on June 23, 2008, 4:06 am
Please log in for more thread options > Out of curiousity, where can you get them for a 1/3rd of the normal price?
>
> moray
I found this site
http://shop.marksman-ind.com/index.asp?function=DISPLAYCAT&catid=113
I've not used them yet and have no connection but the prices look
good.
They sell normal belts as well.
John
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Posted by Don Young on June 22, 2008, 10:31 pm
Please log in for more thread options
I know this is slightly off topic as the engine's in a mower but I
recently bought an ex demo Bolens lawn tractor. It looked imaculate, I
suspect it had never cut any grass. Anyway, it came off eBay for about
1/2 price and worked well so I was happy. It has a 13HP Techumse
engine and replaced an old Sears mower with a B&S that worked well for
many years until the back axle snapped.
Anyway, the new one was put to work and all was wonderful. Then it
began hunting slightly and its 13 horses seemed a little lame. Over
the next few running hours things got worse until it would only run on
full choke. Cleaning the carb and plug only seemed to make matters
worse until it ran no more. Further cleaning of the carb changed
nothing. The engine would only start with my hand covering most of the
carb mouth or with petrol dripping from a brush into said carb mouth.
By now I'd had the carb in bits more times than I can remember and
grudgingly admitted defeat by taking it to my local mower company,
muttering unprintables as I did so.
When I bought the mower, it came without any paperwork except a rather
nondescript receipt. Fortunately that was enough to prove it's date of
purchase so it should be under guarantee.
The agent says it needs a new carb. I suppose at £65/hr, it's cheaper
than paying them to fiddle with it. Techumse are considering the
warrantee claim but the good news is a new carb is only about £35. I
assume there's VAT on that but it's still less than I expected. As a
comparison, my smaller mower needed some drive belts. For some reason,
MTD seem to have them made to their own spec. They cost £30 each! Now
I've got the part Nos, I can get them of the 'net for about 1/3rd
that.
In the meantime, the grass is loving this weather and is growing like
crazy. Does anyone rent out horses or sheep?
John
I suppose you checked that the carb was getting plenty of fuel from the tank
and the tank vent was not plugged. There are a lot of new carbs sold but I
have been working on engines for over 60 years and I have probably replaced
less than 5. They do wear out in some areas but if all passages and jets are
clean and if it is properly assembled and installed it will always work. If
there is fuel in the bowl and the passages are open, the venturi will create
enough suction to pull fuel into the airstream.
Strangely enough, I have found that such lean symptoms are sometimes caused
by insufficient ignition energy. Be sure to try a new plug regardless of how
the old one looks and check that you have a good hot spark.
Don Young (USA)
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Posted by Peter A Forbes on June 23, 2008, 1:23 am
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>John
>I suppose you checked that the carb was getting plenty of fuel from the tank
>and the tank vent was not plugged. There are a lot of new carbs sold but I
>have been working on engines for over 60 years and I have probably replaced
>less than 5. They do wear out in some areas but if all passages and jets are
>clean and if it is properly assembled and installed it will always work. If
>there is fuel in the bowl and the passages are open, the venturi will create
>enough suction to pull fuel into the airstream.
>
>Strangely enough, I have found that such lean symptoms are sometimes caused
>by insufficient ignition energy. Be sure to try a new plug regardless of how
>the old one looks and check that you have a good hot spark.
>
>Don Young (USA)
>
Tecumseh used Carter carbs and another make for some years, but as Don says,
carbs don't normally wear out.
Check that you haven't got grass cuttings in the fuel filter from the tank
(might be in the tap assy)
Tecumseh was a North American Indian, details here:
http://en.wikipedia.org/wiki/Tecumseh
Peter
--
Peter & Rita Forbes
Email: diesel@easynet.co.uk
http://www.oldengine.org/members/diesel
http://www.stationary-engine.co.uk
http://www.oldengine.co.uk
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