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8-N starting problems/compression check

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CJ in MIchigan

08-16-2002 10:40:34

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Hi folks-I decided to do a compression check on the 8N (smokes) and I have removed the hood and tank. I have a marine gas tank in its place holding the fuel. Thing won't start!
The marine tank has a downpipe to the bottom of the tank and a hand bulb for priming, so I wouldn't think fuel delivery would be a problem.
Spark is there.I Have the battery on a trickle charger now as it is a bit drained from starting attempts.
I did a cold compression check -
1(95)
2(75)-sticky valve?
3(105)
5(105)
but I need a warm and a wet reading.
I have some ether- where do I spray it-the air tube or direct into the carb?
Any suggestions gratefully received.
BTW evil steve- the 17th anniversary is the Corned Beef Anniversary.
(my 15th is next week- )
Thanks!

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Evil Steve

08-16-2002 12:11:40

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Re: 8-N starting problems/compression check in reply to CJ in MIchigan, 08-16-2002 10:40:34

CJ-

thanks for the congrats on our 17th. Don't think I'll give her corned beef though. LOL

#2 cylinder concerns me a lot. Yes, do a wet check just on #2 with one tbsn of 30 wt oil. If pressure comes up more than 3-4 pounds, you have a ring problem and potential had gasket problem as Dell described. If not, then stuck valve to treat with MMO/work it free manually.

If the pressure wasn't so great between your cylinders, I'd say just leave it, but that's 20 and > pounds diff. TOO MUCH. It can also result in a thrown rod at higher RPMs with a load. If it turns out to be ring related, I'd pull that piston and overhaul it.

Regarding your gas delivery, the marine tank should work if it has a vent. Otherwise you will create a vaccuum that will restrict fuel supply.

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CJ in Michigan

08-16-2002 15:07:42

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Re: Re: 8-N starting problems/compression check in reply to Evil Steve, 08-16-2002 12:11:40

Thanks O evil one- I am planning to replace the head gasket anyway. The tank does have a vent. I wonder if the timing is a bit off or something like that. Gee, it was running when I parked it!
I'll post results-

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Dell (WA)

08-16-2002 11:25:03

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Re: 8-N starting problems/compression check in reply to CJ in MIchigan, 08-16-2002 10:40:34

CJ..... ....Ford compression specs: 90 psi min. Lotta N's got worser than yours. You might be on the verge of headgasket blowout between #1 & #2. Altho you could have stuck or broken rings on #2 which would explain your complaint of "smoke". Lotta N's smoke and as long as you can start eazily and have enuff power for what ever your doing, most N-Owners learn to live with topping up the engine oil everytime they go to start it.

I alway give whiff of ether quick start at the carb mouth but you can also blow it down your airfilter too but it takes too long for my taste to get thru the filter to the engine..... ..Dell

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