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| starting issues http://mudmotortalk.com/mmt_v2/viewtopic.php?f=3&t=25933 |
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| Author: | belly_up [ Thu Jan 19, 2012 9:41 pm ] |
| Post subject: | starting issues |
36pd non cdi with a single mikuni and mm muffler The motor is starting to be hard to start. I have to hold down the key for a long time and it will cough a couple times and shoot a mist of gas out of the carb which sometimes ignites causing a backfire. It will start but takes a while. Any ideas on the issue? |
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| Author: | Wilson [ Thu Jan 19, 2012 10:35 pm ] |
| Post subject: | Re: starting issues |
Is the starter still turning it fast enough or has it gotten slower? |
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| Author: | Robn1020 [ Thu Jan 19, 2012 10:38 pm ] |
| Post subject: | Re: starting issues |
It may be your coils! Sounds like what i went through. One minute it would start right up. The next i had backfire out carb and muffler and it wouldn't turn over. New set of coils and it starts first turn. |
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| Author: | T-Bubba [ Thu Jan 19, 2012 10:58 pm ] |
| Post subject: | Re: starting issues |
check the valves |
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| Author: | cb5331 [ Thu Jan 19, 2012 10:59 pm ] |
| Post subject: | Re: starting issues |
| Author: | whytry85 [ Thu Jan 19, 2012 11:02 pm ] |
| Post subject: | Re: starting issues |
Sounds like a rev limiter to me.... Happened to mine when it got drenched. Disconnect it and see if it helps.... |
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| Author: | deadbird8 [ Fri Jan 20, 2012 1:50 am ] |
| Post subject: | Re: starting issues |
Agree on checking the valve lash, spitting back through the intake sounds like they aren't opening at the right times. Also check battery and connections for good connection- seen them crank for minutes and not start if its not cranking just fast enough. |
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| Author: | belly_up [ Fri Jan 20, 2012 6:57 am ] |
| Post subject: | starting issues |
Checked the valve lash and all seemed good...right at.005. Rev limiter is disconnected. Starter spins fast. I guess I can go back one more time and check the valve lash to be 100% positive. What could cause that mist of gas to be coming out the carb? |
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| Author: | dfou [ Fri Jan 20, 2012 7:19 am ] |
| Post subject: | starting issues |
Could it be a plug wire grounding somewhere or bad coil? Sounds similar to what mine did when my plug wires were grounding out |
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| Author: | deadbird8 [ Sat Jan 21, 2012 2:51 am ] |
| Post subject: | Re: starting issues |
| Author: | odass [ Sat Jan 21, 2012 9:06 am ] |
| Post subject: | Re: starting issues |
Would low oil pressure have this effect. Maybe loading up cuz its not firing. Then backfiring? Idk just a thought.but I guess that may be a problem more after its warmed up? |
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| Author: | deadbird8 [ Sat Jan 21, 2012 7:13 pm ] |
| Post subject: | Re: starting issues |
| Author: | bayouboy [ Sat Jan 21, 2012 10:28 pm ] |
| Post subject: | Re: starting issues |
How does it run once it fires up? |
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| Author: | belly_up [ Wed Feb 01, 2012 9:32 pm ] |
| Post subject: | Re: starting issues |
It runs great once its up and running. It dies a lot at idle though. We hauled six guys and gear all hunting season and it did great on plane. I had this issue before but it was because the valve lash was way out. I fixed that and it ran perfect for about 6 months. I will run a leak down test but I really hope that it comes out ok. What wire do i need to pull for the oil sensor just so I can rule it out? |
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| Author: | deadbird8 [ Thu Feb 02, 2012 3:13 am ] |
| Post subject: | Re: starting issues |
If you have an oil pressure sensor, its screwed into the side of the block between oil filter and crank case. If you don't have one, there's a plug there. You just disconnect the spade connector ensuring it doesn't ground out. |
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