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No luck getting the 1250 running


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#31 Bolens 1000 OFFLINE  

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Posted March 03, 2016 - 05:58 PM

With them having compression release thats about the reading you'll get on a good engine.

With ACR on these engines you'll get about 60-75


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#32 accidentalchild OFFLINE  

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Posted March 03, 2016 - 06:02 PM

Ok so what next? Anyone know how many volts make it to the spark plug? My thoughts are it is somehow not getting enough juice to the starter generator. I already cleaned up all the wires and such last summer. Gonna check out some comparisons with my 1476 for now but I am running out of ideas.

#33 accidentalchild OFFLINE  

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Posted March 03, 2016 - 06:05 PM

Ok so what next? Anyone know how many volts make it to the spark plug? My thoughts are it is somehow not getting enough juice to the starter generator. I already cleaned up all the wires and such last summer. Gonna check out some comparisons with my 1476 for now but I am running out of ideas.

my 1476 is getting about 12 to the plug.

#34 MiCarl ONLINE  

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Posted March 03, 2016 - 06:30 PM

my 1476 is getting about 12 to the plug.

No, it isn't.

 

Spark plugs fire at several thousand volts.

 

You cannot correctly read spark plug voltage with an ordinary meter, and there is a good chance you'll damage the meter.

 

Testing for spark voltage is typically done with a spark gap tool, but it's not necessary.  Lay the plug on the engine and crank (clean up your gasoline first).  If you get spark then most of the ignition system is probably OK.

 

If you don't get spark try a different plug.  They can be shorted out.

 

Finally, just because a plug sparks outside the engine doesn't mean it will inside.


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#35 AA Hayes OFFLINE  

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Posted March 03, 2016 - 06:31 PM

Do you have an inline spark plug tester? Very handy tool. It is possible your new plug is no good.
How old is your fuel?
With the key in run position and jumping directly to starter gen, you can get spark.
Sounds like an ignition and possibly a small pulley issue. From what I have read, my guess is spark if the issue.
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#36 AA Hayes OFFLINE  

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Posted March 03, 2016 - 06:33 PM

No, it isn't.

Spark plugs fire at several thousand volts.

You cannot correctly read spark plug voltage with an ordinary meter, and there is a good chance you'll damage the meter.

Testing for spark voltage is typically done with a spark gap tool, but it's not necessary. Lay the plug on the engine and crank (clean up your gasoline first). If you get spark then most of the ignition system is probably OK.

If you don't get spark try a different plug. They can be shorted out.

Finally, just because a plug sparks outside the engine doesn't mean it will inside.

This is why I own several inline spark plug testers.

Edited by AA Hayes, March 03, 2016 - 06:33 PM.

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#37 MiCarl ONLINE  

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Posted March 03, 2016 - 06:35 PM

I just watched the video.  It's not just cranking slow, it's actually stopping on the compression stroke then moving again once the compression bleeds off.  That'll never start.

 

Here is how I'd tackle this:

 

1) Get rid of the fuel so you don't start a fire with the flooding carburetor.

2) Solve the problem with the starter.

3) Verify that the plug is firing.

4) Fix the carburetor.


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#38 AA Hayes OFFLINE  

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Posted March 03, 2016 - 06:42 PM

I can't get the video to work for me.
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#39 EricFromPa ONLINE  

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Posted March 03, 2016 - 06:50 PM

Might want to pull the head and clean up the combustion chamber.Looks like there's quite a bit of thick carbon buildup in the plug hole.Sounds like the intake valve is not closing completely.

 

Don't they take a bigger spark plug?My 1250 spark plug was alot bigger.Maybe the PO stuck the heli coil in the hole to make a smaller plug fit.

 

Download his file and use VLC player it plays anything.

 

http://www.videolan.org/vlc/


Edited by EricFromPa, March 03, 2016 - 06:51 PM.

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#40 accidentalchild OFFLINE  

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Posted March 03, 2016 - 06:58 PM

Fuel is new ethanol free gasoline, I cleaned the carb but didn't install a new carb kit as I didn't want to invest in that without it even trying to start. I tried the new plug and the old plug. I read on the manual the lights are to receive five volts and when I check the plug wire itself when turning it over it showes 5 volts and the power to the coil is 5 volts. My 1476 showes 12 to those areas. New starter generator which could be bad. Maybe it's wired incorrectly as the diagram for the engine wiring does not match?. Anyone have a picture of their wiring on a 1250?

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#41 accidentalchild OFFLINE  

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Posted March 03, 2016 - 07:21 PM

This is why I own several inline spark plug testers.

looks like I will be ordering an inline spark tester.

#42 AA Hayes OFFLINE  

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Posted March 03, 2016 - 07:41 PM

looks like I will be ordering an inline spark tester.


Your local auto parts store should have them in stock for not much money.
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#43 Bolens 1000 OFFLINE  

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Posted March 03, 2016 - 07:43 PM

Not sure where your located but I have spark testers instock if needed, I really like these ones and been using one for myself for about 3 years now

 

http://bolenspartsan...nition-systems/


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#44 Paulgo OFFLINE  

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Posted March 03, 2016 - 07:46 PM

Inline testers are handy and cheap. Can be bought at any auto parts store. You mention the wiring being questionable. I don't know much about starter gen's. Hope this doesn't sound silly, but any chance it is running backwards?

 

Sorry, Brian, you and I answered at the same time.


Edited by Paulgo, March 03, 2016 - 07:47 PM.

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#45 EricFromPa ONLINE  

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Posted March 03, 2016 - 08:01 PM

What is the Starter Genny off of? Cub Cadet Starters turn CCW.Also What Coil is on it?Assuming that it's not a Internal Resistor coil since there is a ballast resistor hooked inline.

 

Edit: nvm I see it's turning CW in the video


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