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8N doesn't want to start

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Derrick

03-08-2003 08:31:36




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My 8N I believe is a 49 model, dist on front and no tach, is mostly original except for 12 volt system does not want to start when cold. The carb will fill with gas and gas runs out of the breather side. I removed the breather hose to inspect the choke. I have good spark and I even installed new dist cap. I don't think it is compression and when I pull it with my truck I can get it to run although it does not run smoothly. Could I have a gasket problem or intake problem? I appreciate any help.

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Dell (WA)

03-08-2003 10:16:10




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 Re: 8N doesn't want to start in reply to Derrick, 03-08-2003 08:31:36  
Derrick..... ...CHECK YOUR COMPRESSION, Ford specs: 90 psi min. Check'em dry for 5 puffs, writter down, then wet with about 1 oz oil in sparkie hole, cranker again 5 puffs, writter down.

Tired engine will increase compression 20+ psi. NO increase, blown headgasket, burn exhaust valve, sticky intake valve.

Heres the deal, tired engine needs more dynamic compression (higher crank rpms) than what the 6 volt starter can provide. Even more than what 12 volts on a 6 volt starter can provide. Pulling your tractor for start, turns the engine faster than your starter can ever provide. Thats why you can get your tractor to start.

And that is why thinking your compression is ok is WRONG, unless you've measured it..... .....respectfully, Dell

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raytasch

03-08-2003 09:44:06




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 Re: 8N doesn't want to start in reply to Derrick, 03-08-2003 08:31:36  
Good spark and fuel dripping from carb air intake:
Does it ever run smoothly?
Does it start easy when warm?
1.Try placing your hand over the carb air intake with the ignition off and make sure you have good suction when the engine turns over by starter. This will serve as a poor man's down and dirty compression test. You have to have suction here to get fuel air mix into the cylinders. Possibility that the choke is not working and this will choke her manually. If you try to start her this way you may get burned if she backfires thru the carb. OR:
2.See if she'll start with a shot of starting fluid.
Rule of thumb, the more tired an engine becomes the harder it is to start.
ray

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derrick

03-09-2003 06:47:53




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 Re: Re: 8N doesn't want to start in reply to raytasch, 03-08-2003 09:44:06  
This thing will start when warm but never smooths out to a steady run like it should. Starting fluid did not help. It has enough suction when I put my palm over carb to make a good ring on my hand. I am going to try a different comp. gauge maybe mine is not accurate. If it is compression, how hard is this engine to overhaul? It doesn't look like it would be that bad for someone halfway mechanically inclined. thanks for the input.

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Dell (WA)

03-09-2003 12:01:49




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 Re: Re: Re: 8N doesn't want to start in reply to derrick, 03-09-2003 06:47:53  
Derrick..... ....you write....."This thing will start when warm but never smooths out to a steady run like it should".....Check your firing order, 1,2,4,3 CCW. The ol'N-Engine is so good, it'll runn on 2 cyls. Usually its the 3 & 4 sparkies swapped..... ...Dell



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