just got the '49 running...almost

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DanielV2
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just got the '49 running...almost

Postby DanielV2 » Tue Feb 17, 2015 7:13 pm

Got a pony tank setup on the '49 today and put in a brand new battery. Started to crank on it with some ether but no luck. Setup a 12v battery on it and it cranked up. The 6v is on the charger. What could make it start on the 12v but not the 6v? Also, had the oil filter off the whole time and it never moved any oil through the filter housing. I had filled the primimg port inside the filter housing before cranking on it. I am not sure what to do about that...
Thanks,
Daniel V

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Dale Finch
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Re: just got the '49 running...almost

Postby Dale Finch » Tue Feb 17, 2015 7:30 pm

Could be your battery cables are not heavy duty enough, or the terminals are not "Bright and Shiny", causing too much voltage drop. You might feel for "hot spots" after cranking with a 6v battery, such as terminal ends, or along the battery cable. 6v systems are VERY sensitive to high resistance anywhere along the wiring.

As for the priming, keep filling that hole in the filter housing. If it is not pumping oil back up and out when cranking or running, you are not getting oil to the bearings = bad!

Good luck!

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RaymondDurban
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Re: just got the '49 running...almost

Postby RaymondDurban » Tue Feb 17, 2015 7:30 pm

The faster turning engine with the 12v battery will build up more compression than the 6v battery will. What are your compression numbers for each cylinder?

For the oil, don't run it again until you have oil being pumped. Keep squirting oil down the hole, and then turn the engine over without the ignition on. Continue this until you see oil being pumped out of the hole, then its safe to replace the cap and start the engine up and monitor the oil pressure gauge.

DanielV2
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Zip Code: 70401
Location: Hammond, LA

Re: just got the '49 running...almost

Postby DanielV2 » Tue Feb 17, 2015 8:15 pm

Havent measured the compression yet.

For priming the oil pump, I need to continue adding oil every few turns until I see it coming inti the oil filter housing? Where exactly will it come inti the housing?
Daniel V

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RaymondDurban
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Re: just got the '49 running...almost

Postby RaymondDurban » Tue Feb 17, 2015 8:22 pm

Yes, when the pump is primed, oil will squirt out that same hole into the filter housing.

Eugene
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Re: just got the '49 running...almost

Postby Eugene » Tue Feb 17, 2015 8:33 pm

Magneto ignition system?
I have an excuse. CRS.

DanielV2
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Re: just got the '49 running...almost

Postby DanielV2 » Tue Feb 17, 2015 8:54 pm

External coil.

Eugene
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Re: just got the '49 running...almost

Postby Eugene » Tue Feb 17, 2015 9:01 pm

DanielV2 wrote:External coil.
Really didn't answer the question. Magneto with external coil?

Have you checked the ignition timing at engine cranking speed (6 volts) and then the ignition advance once the engine starts?
I have an excuse. CRS.

DanielV2
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Joined: Thu Jan 29, 2015 12:48 pm
Zip Code: 70401
Location: Hammond, LA

Re: just got the '49 running...almost

Postby DanielV2 » Tue Feb 17, 2015 9:10 pm

Sorry, not familiar with all the terminology yet. Magneto with external coil. Checked the timing befor cranking, would that be static timing? I am not sure how to perform the two checks you are suggesting.

bythepond88
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Re: just got the '49 running...almost

Postby bythepond88 » Wed Feb 18, 2015 1:08 pm

Static timing is the engine timing at rest (i.e. not turning over). Static timing should be right at TDC for number one cylinder (the cylinder at the front of the engine, whose plug connects to the tower at 2 o'clock position on the distributor cap. Check the "How To" section for static timing a magneto.

For a magneto, the advance is constant (i.e. it does not increase with engine speed), and I think it should be 13 degrees once the engine is running. You will need a timing light to check timing when the engine is running.

Another reason why it might start with 12v but not with 6v is marginal connections at the battery cable ends. Too corroded to let enough juice through at 6v, but 12v was enough.
Michael Cummings
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DanielV2
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Joined: Thu Jan 29, 2015 12:48 pm
Zip Code: 70401
Location: Hammond, LA

Re: just got the '49 running...almost

Postby DanielV2 » Sat Feb 21, 2015 6:43 pm

Got the oil pump going today! Thanks for everyone's help!

Daniel V


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