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bottomlock20
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Quote bottomlock20 Replybullet Topic: allen scythe
    Posted: 28 Sep 2013 at 12:46pm
I am the happy owner of a mk25 which starts first time. However the engine struggles when I engage drive and stalls when the cutters meet any thick grass. I also have to flood the carb to restart it which the manualsays I sshouldn't need to. Any ideas?
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Stuart.
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Quote Stuart. Replybullet Posted: 28 Sep 2013 at 2:38pm
Seems like its running too lean.Have you stripped and cleaned the carburettor ?.Make sure you have a good fuel supply in the first place to the carburettor.If the engine runs better with the choke partially "on" then i suspect you have a blocked main jet.An air leak will also give a lean mixture so check gaskets,crankcase joints etc.
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mowersman
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Quote mowersman Replybullet Posted: 28 Sep 2013 at 5:23pm
Mk25, or Mk25C? That will make a very big difference...
Andrew
The more I work with petrols, the more I like diesels...
Yeovil, Somerset
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Quote bottomlock20 Replybullet Posted: 28 Sep 2013 at 5:23pm
Many thanks will try that tomorrow.
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Quote bottomlock20 Replybullet Posted: 28 Sep 2013 at 5:24pm
Er mower man how do I check whether its a 25 ir 25c?
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Quote mowersman Replybullet Posted: 28 Sep 2013 at 5:33pm
2 or 4 stroke?
The more I work with petrols, the more I like diesels...
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Quote mowersman Replybullet Posted: 28 Sep 2013 at 5:37pm

Mk25 4 stroke^^^^^^^



Mk25C 2 stroke^^^^^^
The more I work with petrols, the more I like diesels...
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Quote bottomlock20 Replybullet Posted: 28 Sep 2013 at 6:02pm
2 stroke
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will_haggle
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Quote will_haggle Replybullet Posted: 28 Sep 2013 at 6:09pm
Everything Stuart said and clean out the exhaust while you're at it!
6 months ago I couldn't even spell engineer - now I are one
Calne, North Wiltshire...
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Quote bottomlock20 Replybullet Posted: 28 Sep 2013 at 6:15pm
ahhhhhhhhh Will, my exhaust silencer is missing I am waiting for its replacement to arrive, but will also check the exhaust outlet is clean.

Many many thanks both of you for your advice.
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Quote bottomlock20 Replybullet Posted: 28 Sep 2013 at 6:31pm
er sorry to bother u again but should the petrol tank cap have a small hole in it to let air in? Mine doesn't and if I don't release it every now and then. it creates a vacuum?
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Quote Stuart. Replybullet Posted: 28 Sep 2013 at 7:13pm
Yes there should be a small breather hole in the fuel cap for the very reason you have said.
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Quote mowersman Replybullet Posted: 28 Sep 2013 at 7:43pm
That will be your problem then, as well as the lack of a silencer. 2 strokes are very fussy about having the correct amount of back pressure. I wouldn't bother stripping and cleaning the carb, until you've sorted the problems A blocked one will normally cause it to die completely, rather than just lose power.
Andrew
The more I work with petrols, the more I like diesels...
Yeovil, Somerset
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