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New rebuild- carb or ignition problem

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Billy balls
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New rebuild- carb or ignition problem

Postby Billy balls » Tue Mar 04, 2014 7:19 pm

Just rebuilt my 1957 international cub lo boy from the ground up. New everything , including a 6v to 12v conversion from Steiner. New mini alternator, internal resisted coil. Rebuilt stock carb. Tractor starts fine. There is a bad misfire in engine. Misfires badly at higher rpm , but can tell it through all rpm. Noticed ignition coil gets VERY hot in a short time? Charging system seems to be working fine. 12+ volts at lo rpm, 13-14 volts at higher rpm. If you try to throttle up quickly the engine dies. Been back through most everything and running out of thoughts.

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Don McCombs
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Re: New rebuild- carb or ignition problem

Postby Don McCombs » Tue Mar 04, 2014 7:32 pm

The coil getting hot quickly is an indicator that it may be breaking down. Is the coil new or old? Was any engine work done as a part of the rebuild?
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Billy balls
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Re: New rebuild- carb or ignition problem

Postby Billy balls » Tue Mar 04, 2014 7:50 pm

Yes,Engine rebuild: bored .30 over, new pistons, valves , valve guides, and bearings. All new points, condenser, cap, wires, plugs. Engine sounds solid. New coil, alternator , amp meter.

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Re: New rebuild- carb or ignition problem

Postby Boss Hog » Tue Mar 04, 2014 7:53 pm

How do you have it wired? Coil may be wired wrong. [ backwards] and how is the Alt. wired?
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Re: New rebuild- carb or ignition problem

Postby Boss Hog » Tue Mar 04, 2014 7:55 pm

You may have it wired so the Alt is putting its charge to the coil, that will cook a coil quick
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Billy balls
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Re: New rebuild- carb or ignition problem

Postby Billy balls » Tue Mar 04, 2014 8:03 pm

It's wired per the diagram that was sent with alternator.( not to say its correct, you never know?)

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Re: New rebuild- carb or ignition problem

Postby Eugene » Tue Mar 04, 2014 8:10 pm

Two plug wires on wrong spark plugs.

Timing light. Test each plug wire to see if the fault is in the spark/ignition.
I have an excuse. CRS.

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randallc
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Re: New rebuild- carb or ignition problem

Postby randallc » Wed Mar 05, 2014 5:21 am

Bad coil, even some of the new ones are bad. Change it out and try it.
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Billy balls
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Re: New rebuild- carb or ignition problem

Postby Billy balls » Wed Mar 05, 2014 7:07 am

Will do. I will order another one today. Is there a better coil on the market than the Steiner product?

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Don McCombs
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1948 Farmall Super A
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Re: New rebuild- carb or ignition problem

Postby Don McCombs » Wed Mar 05, 2014 9:30 am

NAPA part number for 12V IR coil is IC14SB.
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Re: New rebuild- carb or ignition problem

Postby CraigKennedy » Thu Mar 06, 2014 8:54 pm

for the coil getting hot, check your wiring at your ignition switch on the dash, I had got the wires switched around, and my coil would get hotter than hell just sitting there. sounds like your timing is off, a little.
Read in the manual and it will give you step by step instructions on setting the timing, make sure when setting the timing you are on TDC on #1. pull the spark plug out to make sure!! the TDC mark, marks #1 and #3 TDC
but thinking about it, sounds like your distributor gear is off by a tooth or so. pull the distributor off and realign, it took me a few tries the first time but then when everything is aligned it all falls together PERFECTLY... hope this helps

-Craig

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Re: New rebuild- carb or ignition problem

Postby RaymondDurban » Thu Mar 06, 2014 9:18 pm

The TDC mark on the pulley identifies #1 and #4 cylinders at TDC.

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Re: New rebuild- carb or ignition problem

Postby Scrivet » Thu Mar 06, 2014 11:01 pm

CraigKennedy wrote:for the coil getting hot, check your wiring at your ignition switch on the dash, I had got the wires switched around, and my coil would get hotter than hell just sitting there. ..........
:? Is this on a regular distributor kill switch (two wiring terminals, pull knob out to run, push in to kill) that this happened?

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Re: New rebuild- carb or ignition problem

Postby Billy balls » Thu Mar 06, 2014 11:04 pm

Yes it is

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Re: New rebuild- carb or ignition problem

Postby CraigKennedy » Fri Mar 07, 2014 12:15 am

RaymondDurban wrote:The TDC mark on the pulley identifies #1 and #4 cylinders at TDC.



*#1 and #4


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