richie rich Posted August 26, 2017 Share Posted August 26, 2017 Well today i was at full throttle then engine cut out and wont fire i pulled the spark plug out and touched it on the head but no spark took it home tried it in the garage in the dark i could just see a small spark is this normal ? Also ive trying to get it to fire for ages and noticed it has unburnt fuel in head aswell. The carb has had issues in the sense that when u pull back to out brakes on tick over drops and it cuts out ao turn tick over up bit when u have brakes off its to fast , ive set the linkages to hpi manual aswell but i dont think this is causing it not to fire[emoji849] Sent from my SM-G955F using Tapatalk Quote Link to comment Share on other sites More sharing options...
dalex Posted August 26, 2017 Share Posted August 26, 2017 Check the coil gap, maybe it dropped, should be 12 thou of an inch, check plug gap should be 25 thou of an inch, try another plug, unplug killswitch and try too. Cheers Dave Quote Link to comment Share on other sites More sharing options...
richie rich Posted August 26, 2017 Author Share Posted August 26, 2017 Thanks dave i will give that a go i dont understand the thou of a inch if am honest tho i have a filler gauge but its in mm Sent from my SM-G955F using Tapatalk Quote Link to comment Share on other sites More sharing options...
evssv Posted August 26, 2017 Share Posted August 26, 2017 Use a shiny business card to set the coil gap dude .... Quote Link to comment Share on other sites More sharing options...
dalex Posted August 26, 2017 Share Posted August 26, 2017 12 thou is 0.3 mm and 25 thou is 0.6 mm if you have any feeler gauges, sorry used to working on american ***** machinery. Cheers Dave 1 Quote Link to comment Share on other sites More sharing options...
MARDER-MAN30 Posted August 29, 2017 Share Posted August 29, 2017 I presume you've tried a new plug? Quote Link to comment Share on other sites More sharing options...
richie rich Posted August 30, 2017 Author Share Posted August 30, 2017 Well I've tried to plugs now and a new coil have spark but still not firing Sent from my SM-G955F using Tapatalk Quote Link to comment Share on other sites More sharing options...
evssv Posted August 30, 2017 Share Posted August 30, 2017 (edited) u gapped it with a business card??u got a klll switch fitted?try discounting that and try to start it......I had running probs on my baj and it was dodgy kill switch wiring.... Edited August 30, 2017 by evssv Quote Link to comment Share on other sites More sharing options...
richie rich Posted August 30, 2017 Author Share Posted August 30, 2017 u gapped it with a business card??u got a klll switch fitted?try discounting that and try to start it......I had running probs on my baj and it was dodgy kill switch wiring....Yeah used a business card and disconnected the kill switch it has spark still not firing [emoji849]Sent from my SM-G955F using Tapatalk Quote Link to comment Share on other sites More sharing options...
evssv Posted August 30, 2017 Share Posted August 30, 2017 fair nuff.....strange Quote Link to comment Share on other sites More sharing options...
richie rich Posted August 30, 2017 Author Share Posted August 30, 2017 It feels like it has compression when pull starting it really don't no what to try it's new engine as Well only 3 tanks threw itSent from my SM-G955F using Tapatalk Quote Link to comment Share on other sites More sharing options...
dalex Posted August 30, 2017 Share Posted August 30, 2017 (edited) Check all the head bolts, carb bolts, exhaust bolts are tight, disconnect the kill switch completely, check the coil wires are undamaged including the plug cap and remove the throttle linkage. Check the carb settings are somewhere near the factory settings, turn up the idle and try again. 2 or 3 pulls with choke on then choke off to start it. If u flood it, remove plug, turn upside down and pull pullstart a few times. Shine a torch into cylinder to look for damage ? You can put a drop of petrol in cylinder, replace plug and try too, if it starts then it may point at the carb, are the petrol lines on the correct way ? Cheers Dave Edited August 30, 2017 by dalex Quote Link to comment Share on other sites More sharing options...
richie rich Posted August 30, 2017 Author Share Posted August 30, 2017 Check all the head bolts, carb bolts, exhaust bolts are tight, disconnect the kill switch completely and the throttle linkage. Check the carb settings are somewhere near the factory settings, turn up the idle and try again. 2 or 3 pulls with choke on then choke off to start it. If u flood it, remove plug, turn upside down and pull pullstart a few times. Shine a torch into cylinder to look for damage ? You can put a drop of petrol in cylinder, replace plug and try too, if it starts then it may point at the carb, are the petrol lines on the correct way ? Cheers DaveWow thanks Dave [emoji106]I will try that yeah I haven't touched the fuel lines at all it was runing but it just cut out all of sudden Sent from my SM-G955F using Tapatalk Quote Link to comment Share on other sites More sharing options...
dalex Posted August 30, 2017 Share Posted August 30, 2017 Not a fifth scale but principle is same to maximise coil set up, gap is 0.3 mm feeler Cheers Dave Quote Link to comment Share on other sites More sharing options...
dalex Posted August 30, 2017 Share Posted August 30, 2017 May help Dave Quote Link to comment Share on other sites More sharing options...
dalex Posted August 30, 2017 Share Posted August 30, 2017 Carb settings Dave Quote Link to comment Share on other sites More sharing options...
richie rich Posted August 30, 2017 Author Share Posted August 30, 2017 That's the plug that came out before it cut out Sent from my SM-G955F using Tapatalk Quote Link to comment Share on other sites More sharing options...
QRC Posted August 31, 2017 Share Posted August 31, 2017 Give it a good brush or as I do just put a new plug in, their so cheap !!. Quote Link to comment Share on other sites More sharing options...
richie rich Posted September 1, 2017 Author Share Posted September 1, 2017 Well some things have happened over last few days firstly new no spark plug and coil also tiped upside down and fuel came driping out I presume from not firing so I left it couple of days with spark plug off to dry out put spark plug back In won't turn over seized [emoji849]it was turning over fine 2 days again surely removing spark plug wouldn't of cause that so put couple of drops of fuel down the head and left it 15 mins then it turned over but still won't fire at all really geting me down all bolts are tight head carb etc really hope my engine hasn't gone Sent from my SM-G955F using Tapatalk Quote Link to comment Share on other sites More sharing options...
richie rich Posted September 1, 2017 Author Share Posted September 1, 2017 Well some things have happened over last few days firstly new spark plug and coil also tipped upside down and fuel came driping out I presume from not firing so I left it couple of days with spark plug off to dry out put spark plug back In won't turn over seized [emoji849]it was turning over fine 2 days again surely removing spark plug wouldn't of cause that so put couple of drops of fuel down the head and left it 15 mins then it turned over but still won't fire at all really geting me down all bolts are tight head carb etc really hope my engine hasn't gone Sent from my SM-G955F using TapatalkSent from my SM-G955F using Tapatalk Quote Link to comment Share on other sites More sharing options...
dalex Posted September 1, 2017 Share Posted September 1, 2017 Strange that for nearly new engine, I would drop engine out, remove plug, remove pull start and see if engine is still tight, if it is remove clutch and try again, if its still tight then its internal to the engine, time to strip down and look for damage,carb or exhaust off lets u see the piston skirt, new gaskets will be need to rebuild too. If its that new maybe ask about warranty too Cheers Dave Quote Link to comment Share on other sites More sharing options...
richie rich Posted September 1, 2017 Author Share Posted September 1, 2017 Strange that for nearly new engine, I would drop engine out, remove plug, remove pull start and see if engine is still tight, if it is remove clutch and try again, if its still tight then its internal to the engine, time to strip down and look for damage,carb or exhaust off lets u see the piston skirt, new gaskets will be need to rebuild too. If its that new maybe ask about warranty too Cheers Dave Hi it's newly built by me lol I've had pull start off that was fine it was ok once I put few drops of fuel down head but still won't fire gonna take head off now and see if the ring has any damage I will post pics up Sent from my SM-G955F using Tapatalk Quote Link to comment Share on other sites More sharing options...
richie rich Posted September 1, 2017 Author Share Posted September 1, 2017 Well i found out what it is the clip that holds the piston on had come loose and snaped off and wrecked my piston and head and ring ordered new bits just need to find someone selling the clips Sent from my SM-G955F using Tapatalk Quote Link to comment Share on other sites More sharing options...
Rover Man Posted September 1, 2017 Share Posted September 1, 2017 http://www.freeprawnracing.co.uk/petrol-parts/engine-parts/pistons-and-piston-rings/zenoah-pistons-and-piston-rings/snap-ring-gudgeon-pin-clip-2pcs-z1260-41320.html Quote Link to comment Share on other sites More sharing options...
dalex Posted September 1, 2017 Share Posted September 1, 2017 Nowt a bit of T cut won't sort out Cheers Dave 1 Quote Link to comment Share on other sites More sharing options...
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