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rebuilt B wont go.....What and I missing?

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jpuleo

10-19-2004 22:24:24




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Im about to give up on starting my B. I just rebuilt it after buying it stuck. Im still convinced its a timing issue, but no matter what I try, it wont even come close to starting. Ive gotten spark to where its quite good, theres plenty of compression as I just did a engine rebuild with new rings and lapped valves, valves are adjusted perfect as I have checked twice with dome cover off. Everything there opens and closes as it should. I have sprayed everything from gas to starting fluid with nothing more than about 1 random "pop" for every 30sec of cranking. So Ive got comp, fire and fuel. Only thing left is timing in my mind. I will list what I have tried so far in hopes someone can point out something Im missing.

Installed new autolite 295 plugs as well as j-8 champions have been tried "gaped to spec". All show strong blue/white spark when hand cranked or 12v on the starter. I have sand blasted the copper core wires connections, but as I get strong spark at the plugs I think that I can rule out a problem with plugs, wires, rotor, and cap. I have also tested every wire and all spark fine. I have set the points gap at .020 and made sure they are clean. Magneto "snaps" loudly when hand cranking. I have set the timing to exact specs pre dueys site. mag "snaps" right around TDC on front cyl comp stroke. When I take the cap off at this point rotor is right on at 10:00 to fire cyl 1. I know its the compression stroke as I put finger in plug hole to make sure. wires are on 1-2-4-3. I have tried switching the plug wires in every way possible to no avail. Have timed several gear teeth off on fiber gear in both directions. I also replaced the condenser because when it was installed it stopped any spark from happening. New one does the same. So I wrapped it with electrical tape to isolate it and it seems fine, but perhaps this is a clue?

I have even poured a few ounces of gas in cylinders and cranked with a 12v battery and still nothing. I get nice suction throught the inake and good flow out the stack. Im new to tractors and magnetos, but and a pretty experienced engine mechanic and am completly stumped and living in CT I am also 4 hours drive from any shop that can work on something like this.
Thanks so much in advance for any help.
Joe

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Ed H.

10-20-2004 11:31:28




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 Re: rebuilt B wont go.....What and I missing? in reply to jpuleo, 10-19-2004 22:24:24  
OLD is right you may have to pull it...a fresh motor starts hard especially if you have a hand crank start .....the rings are'nt seated it, and all the starting fluid has washed the oil off the rings, even though you "hear" compression with you thumb over the hole , its not enough compression to "pull" in a good charge of air/fuel mix....i've sqirted oil in the cylinders before, but it may foul the plugs....email me if you need my phone number, i'm sure we can figure it out

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Jpuleo

10-20-2004 13:53:14




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 Re: rebuilt B wont go.....What and I missing? in reply to Ed H., 10-20-2004 11:31:28  
OK, I poured some oil in jugs and it fired up for about 6 seconds. Seems I wasnt getting enough compression. Looks like im on the right track, please keep the advice coming as Im far from there.
Thanks



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old

10-20-2004 08:48:15




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 Re: rebuilt B wont go.....What and I missing? in reply to jpuleo, 10-19-2004 22:24:24  
Every thing maybe ok you may just plain have to pull it to get it to start. I've had the same problem with a new/rebuilt engine before, it just some times takes more then what the starter or hand cranking will do to get it to fire up the first time. Been there done that to many times. Give it a pull and see what happens.



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Kent of SW MO

10-20-2004 07:32:39




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 Re: rebuilt B wont go.....What and I missing? in reply to jpuleo, 10-19-2004 22:24:24  
The only thing I can think of is you may have used the wrong timing marks on the cam, You may have use the mark for the govener gear on the crankshaft. Looks like you have covered all the other bases. I may not be right about this!!!

Kent



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Jpuleo

10-20-2004 16:10:46




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 Its ALIVE!! in reply to Kent of SW MO, 10-20-2004 07:32:39  
Thanks all, Old,,,,,you were right on!



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