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| Not Starting NOW Starting https://www.ausmini.com/forums/viewtopic.php?f=2&t=66348 |
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| Author: | 76van [ Sat Oct 16, 2010 11:44 am ] |
| Post subject: | Not Starting NOW Starting |
Have changed carby from a weber to 1.5" SU & can`t get the bugger to start. motor winds over fine but just wont start. had this problem with the weber on it had the mechanic sort it & the timing was miles out, could this be the problem with having changed the carby ? cheers jayson |
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| Author: | GT mowog [ Sat Oct 16, 2010 12:06 pm ] |
| Post subject: | |
If it was running OK with the Weber, the timing should definitely be well and truely in the ball park for the SU. Checked the needle & seat in the float bowl isn't jamed closed? Jet not blocked? Choke working? Take the Bell off the carb and have a look down the jet, you should be able to see the fuel level. Is the needle close for your applcation? |
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| Author: | simon k [ Sat Oct 16, 2010 12:07 pm ] |
| Post subject: | |
no, if the timing was right before, it'll still be right now basic checks first... is the float bowl full of fuel? (if no, then the needle and seat is stuck, un-stick it) do the spark plugs smell of fuel? (if no, then unscrew the big nut under the carb 1/2 a turn and see what it does) and then you'll have a million more suggestions of what it'll be 
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| Author: | simon k [ Sat Oct 16, 2010 12:08 pm ] |
| Post subject: | |
beat me GT
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| Author: | 76van [ Sat Oct 16, 2010 5:57 pm ] |
| Post subject: | |
thanks,will have a look at this tomorrow hopefully it will have stop snowing by then. |
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| Author: | 76van [ Wed Oct 20, 2010 3:49 pm ] |
| Post subject: | |
car is now starting & running. needle seemed to be moving freely,adjusted the mixture nut half a turn down & started fairly easy. thanks for the advice. what needle would you run in a mild 1275 ? currently has a 5. cheers jayson |
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| Author: | jester99 [ Wed Oct 20, 2010 7:57 pm ] |
| Post subject: | |
Hi Jayson, good to hear you got it started. My vizard bible says a good starting needle to try on a 1275 non-S engine with a normal mixture is a DZ with a red spring in the dash pot. if you want a richer mixture from there, vizard recommends a BQ needle and red spring for a 1275 non-S engine. If you have access to a rolling road or dyno tuner, i recommend having it setup correctly that way. otherwise, buy a few different needles and experiment yourself until you feel it is right for you. try the 5 and 6 and see how they go. i recommend getting a copy of david vizards " tuning the A series engine" 3rd edition. a very good read. good luck
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