got a shark 100 quad bike to fix. starter motor turns it over, there is a spark and there is fuel, but it just wont start. taken carb apart, tried easy start and still nothing. any ideas?
anyone know anything about quad bike engines?
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johninlondon1
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is 2 stroke or 4 stroke?
well i assume it did work at some stage of its life
my dad bought it on ebay a few month ago - was advertised as not working, but he thought it would be an easy fix. (just like a (not working) van he bought on ebay that had to be collected from newport a few years ago)
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my dad bought it on ebay a few month ago - was advertised as not working, but he thought it would be an easy fix. (just like a (not working) van he bought on ebay that had to be collected from newport a few years ago)
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2 stroke. separate tank for the oil
Have you done any compression testing?
Id suggest a ring has gone or a piston meltdown. As Noz has suggested see if theres any compression. If its liquid cooled, drain the coolant and pop the head off, if there is no damage there then barrel off and have a look at the bore and piston/rings for damage.
**edit** actually before all that, a mate had a chinese built quad that he could not start a few years back, basically the choke was designed in such a way that it was open nearly all of te time, and the motor just flooded unless you physicvally held it closed
**edit** actually before all that, a mate had a chinese built quad that he could not start a few years back, basically the choke was designed in such a way that it was open nearly all of te time, and the motor just flooded unless you physicvally held it closed
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seems to have compression.
i think the problem might be the spark at the wrong time. or could be as sprocket says and just flooding straight away. ill have another go at it later and see if it will start
i think the problem might be the spark at the wrong time. or could be as sprocket says and just flooding straight away. ill have another go at it later and see if it will start
may be stating the obvious here,
but is it fresh petrol?,
they cant really go off timing unless the flywheel has sheared the key on the crank.
if its flooding straight away the plug will be really wet,
take the plug out and try turning it over with your thumb over the plug hole, you will be able to feel the compression(it wont be much in that little engine),
that way you will feel if its getting fuel too,
if its been sitting a while could be crank seals dozed and oil getting into big end, or sucking air in from the other side,
remember 2strokes compress below the piston as well as above.
2 Stroke Engine Animation And Diagrams
but is it fresh petrol?,
they cant really go off timing unless the flywheel has sheared the key on the crank.
if its flooding straight away the plug will be really wet,
take the plug out and try turning it over with your thumb over the plug hole, you will be able to feel the compression(it wont be much in that little engine),
that way you will feel if its getting fuel too,
if its been sitting a while could be crank seals dozed and oil getting into big end, or sucking air in from the other side,
remember 2strokes compress below the piston as well as above.
2 Stroke Engine Animation And Diagrams
fresh petrol, drained all the old fuel just incase it was that
plug is wet pretty much immediately
you can feel compression with plug removed and thumb over hole
it has been sitting a while - tried for a few days few month ago, been sitting in the corner of unit since then until the other day
i was thinking the same about the timing - it cannot be attached to shaft in the wrong place
could have sheared the key though,
whip the cover off and have a quick look, chances are if it has moved it will be by quite a bit and will be obvious.
have you tried it without an air filter?
whip the cover off and have a quick look, chances are if it has moved it will be by quite a bit and will be obvious.
have you tried it without an air filter?
already have - the key is intact
air filter is somewhere on a shelf full of parts (covers etc) that were removed from it
air filter is somewhere on a shelf full of parts (covers etc) that were removed from it
not much can go wrong with single cylinder strokers TBH,
fuel air spark, suck squeeze bang blow,
have you tried a new plug? sometimes under compression they can break down,
fuel air spark, suck squeeze bang blow,
have you tried a new plug? sometimes under compression they can break down,
not tried a different plug yet (dont have one lying round)
just a thought, is it the right length?
I'll have a check now to see whats meant to be in that,
what model is it? Ive got an NGK cross reference book here.
I'll have a check now to see whats meant to be in that,
what model is it? Ive got an NGK cross reference book here.
its a quadzilla shark 100
The names these comanies give things nowdays make me laugh
running out of ideas... everything else is already taken
NGK BPR8ES , bog standard long reach plug
Nicky Tesla
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Have you got another 1 to tow it round your yard
it wouldnt be a fuel filter blockage would it :C
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