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#1
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?m1 Mountfield Rotorvator
Hi,
I have a Mountfield M1 rotorvator with a Briggs and Stratton engine, model 111902. The problem is it runns for 10-15 minutes and the conks out. It will then not start for about 10 minutes. I have rebuilt the carburetor and replaced most of it. That has helped slightly as it only used to run for about 5 minutes before. I have also replaced the head gasket. The are under the head was rather black but I have cleaned this off. The inlet valve was a funny pink/coral colour. What can I do to make it run longer? Why does it keep stopping? Thanks |
#3
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?m1 Mountfield Rotorvator
"Steve Sampson" wrote in message ... Hi, I have a Mountfield M1 rotorvator with a Briggs and Stratton engine, model 111902. The problem is it runns for 10-15 minutes and the conks out. It will then not start for about 10 minutes. First check fuel is getting to the carb. Does the fuel run freely from the supply pipe, if its an under carb tank is the diaphragm/gasket between carb and tank in good nick/fitted correctly. Check the choke is it clearing the carb opening okay. check the air filter, try running the engine without an air filter. The filter or choke may be restricting air flow which the engine won't mind whilst its cold but will object to once hot. If this is all ok look to the main jet in the carb is it getting blocked by crap from a rusty tank. Then check the spark. Are you getting a spark when its hot? This may be caused by a dodgy HT lead/cap. If the engine has points ignition have you replaced them and the condenser. Both located inside the flywheel and can be a bugger to get to. Have you dead stalled the engine by hitting something solid? More common with direct drive rotary mowers I know but a bad stall can slightly shear the woodruff key keeping the flywheel in position thus altering the timing. Again a cold engine may not mind the timing being a bit out but a hot one will. If fuel and spark are okay, then the problem may be that the engine is simply worn out, in which case Charlie had the best advise. Mike www.farend.org.uk |
#4
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?m1 Mountfield Rotorvator
When I was looking for a rotavator a gent told me to stay clear of
Briggs and Stratton because they run for 10 minutes and stop. Have to leave them and let them cool down and then they start. His advice to me was to get a machine with a Honda engine because they are so reliable. Asking around to confirm this and got a few people saying the same thing. Unfortuantely Steve you are not the only one to have to suffer this problem, regretably no simple solution (unless you fancy fitting a different motor!) Good luck Clifford Bawtry, Doncaster, South Yorkshire |
#5
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?m1 Mountfield Rotorvator
"cliff_the_gardener" wrote in message ... When I was looking for a rotavator a gent told me to stay clear of Briggs and Stratton because they run for 10 minutes and stop. Have to leave them and let them cool down and then they start. His advice to me was to get a machine with a Honda engine because they are so reliable. Asking around to confirm this and got a few people saying the same thing. Unfortuantely Steve you are not the only one to have to suffer this problem, regretably no simple solution (unless you fancy fitting a different motor!) Yes the Honda is considered a better engine, yet I have owned (and still do own) many B&S powered machines with no problem. My Billy Goat is B&S powered and it starts second pull every time and runs perfectly as did my old Merry Tiller rotavator that I gave away when I moved. Both my Hayter grass cutters are B&S powered, so long as I remember to run them dry at the end of the mowing season they both have always started with ease at the beginning of the new season and continue to do so hot or cold. Admittedly they are both electric start which makes life easier. My only 4 stroke machine without a B&S engine is the snow blower which has a Tecumseh Snow King. Again it has never failed to start when I have asked it to but I do look after it with regular oil changes and fresh fuel into a dry tank each season. Mike |
#6
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?m1 Mountfield Rotorvator
On 8 Mar, 17:21, "Muddymike" wrote:
"cliff_the_gardener" wrote in message ... When I was looking for a rotavator a gent told me to stay clear of Briggs and Stratton because they run for 10 minutes and stop. Have to leave them and let them cool down and then they start. *His advice to me was to get a machine with a Honda engine because they are so reliable. Asking around to confirm this and got a few people saying the same thing. Unfortuantely Steve you are not the only one to have to suffer this problem, regretably no simple solution (unless you fancy fitting a different motor!) Yes the Honda is considered a better engine, yet I have owned (and still do own) many B&S powered machines with no problem. My Billy Goat is B&S powered and it starts second pull every time and runs perfectly as did my old Merry Tiller rotavator that I gave away when I moved. Both my Hayter grass cutters are B&S powered, so long as I remember to run them dry at the end of the mowing season they both have always started with ease at the beginning of the new season and continue to do so hot or cold. Admittedly they are both electric start which makes life easier. My only 4 stroke machine without a B&S engine is the snow blower which has a Tecumseh Snow King. Again it has never failed to start when I have asked it to but I do look after it with regular oil changes and fresh fuel into a dry tank each season. Mike Sounds like a problem I once had, the cap on the petrol tank wasn't letting air into the tank so a vaccume was developing so stoping the fuel from flowing.after a few minutes the air seeped back into the tank and it would go again for a few mins. worth checking. David Hill Abacus Nurseries |
#7
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?m1 Mountfield Rotorvator
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... -- Cheers Dave. |
#8
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?m1 Mountfield Rotorvator
Do you live at Poets Corner?
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#9
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?m1 Mountfield Rotorvator
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 |
#10
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?m1 Mountfield Rotorvator
After reading just about every thing I can on rotavators before I buy one I have come to the conclusion that it is not so much the b&s engine there are far to many very good reports on them maybe its just that mountfield rotavators as a hole are shit
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#11
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?m1 Mountfield Rotorvator
Lesley wrote
After reading just about every thing I can on rotavators before I buy one I have come to the conclusion that it is not so much the b&s engine there are far to many very good reports on them maybe its just that mountfield rotavators as a hole are shit. One of the cheaper makes and with all garden machinery you get what you pay for. Depends how much you want to spend? I've got a Honda one (Eqv F220) that I've had for many years and it starts first pull even after being laid up for months and all I've ever done is change the oil, spares are also available which is handy because I've worn out one set of tines and replaced them. http://www.honda.co.uk/garden/tillers/ Viking are part of the Stihl group and they also make tillers. http://www.vikingmowers.co.uk/VIKING...0/Tillers.aspx If you can get one that you can adjust the handles sideways so you don't have to walk on what you have tilled then so much the better. -- Regards. Bob Hobden. Posted to this Newsgroup from the W of London, UK |
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