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Hitachi Fail in 720


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#61 Humboldt

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Posted 21 June 2017 - 02:53 PM

I have too (two) many projects.

 

The 72 goon has a matchbox dizzy scabbed off a donor yellow 80 720 king cab (now in the junk yard). It's coli reads 9.9k primary, 1.4 secondary. (with no external resistor) I'm reading spec. to be primary8.2 - 12.4k ohms and secondary .84 - 1.2 ohms, so it is in range.  I fired it up yesterday with a hose to a can of gas using my newly cut key. There was some smokeage coming off the exhaust manifold, which I tightened down later. Still not getting gas to suck up from the tank. I blew on the line that comes from the tank, before the fuel filter and it didn't seem to be blocked. Is their some juju I need to know  about the  evaporative tank, or do I need to try to blow out that line with compreessed air?

:poop: Then I couldn't get the ignition to shut off. Key rotated to no avail.

 

Meanwhile, my remaining  white 1980 720 coil also reads within range: 10.7k primary, 1.1 secondary (no external resistor) Spark plug wires all read 5.5 - 6k so they are fine (less than 30k). Spark plug gaps fine. But I still can't get id to idle smoothly. It sounds like it has a hot cam then dies. I'm back to thinking that Hitachi has gotta go.



#62 datzenmike

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Posted 21 June 2017 - 07:13 PM

EI coils are 0.8 to 1.0 ohms. A 1.5 ohm coil might be from a points distributor. If so, it must have the ballast resistor or it will draw too much current through it and over heat.


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#63 Humboldt

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Posted 09 July 2017 - 07:44 PM

Ordered Weber for 720. Probably have to drop tank on 510 and figure out how to clear gas lines.



#64 racerx

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Posted 09 July 2017 - 08:40 PM

U try blowing compress air

#65 Humboldt

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Posted 10 July 2017 - 07:59 PM

Put weber in 720 gutted air pump etc. Waiting to put in Manual Choke cable tomorrow.



#66 Humboldt

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Posted 10 July 2017 - 09:34 PM

Probably will buy 39.95 harbor freight air compressor also for 510 goon gas lines. Beats pulling tank.



#67 racerx

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Posted 11 July 2017 - 07:19 AM

Good idea...not sure what the previous owner intended on my car back in the days but my carb was acting up and compressed air to the line worked for awhile then fuel starved again so i took out fuel tank and clean inside but then I saw silicon blocking the fuel inlet. You may want to check ur tank anyway. Not hard to take out

#68 Humboldt

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Posted 11 July 2017 - 03:01 PM

Got the webber on and the air pump etc. off today. It's singing like a canary!



#69 Humboldt

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Posted 11 July 2017 - 08:58 PM

Lawnmower--fixed--720 fixed--now on to the goon--bought the shitty Harbor Freight compressor--why not might work once-- ($39) to blow out lines.



#70 Humboldt

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Posted 16 July 2017 - 09:28 AM

Blew out fuel line with Harbor Freight pancake compressor ($39.99). Getting gas now, yay!. One wrinkle: my ground wire to alternator was disconnected and the motor wouldn't shut off! Had to choke it to death.  Replacing valve cover gasket and doing valve adjust now. Then I'll reinstall the passenger's side door lock I removed to get key code for cutting a key to replace missing key. Getting cllose to roadworthy vehicle.