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sears suburban not starting


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#1 ace69xxx2000 OFFLINE  

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Posted April 30, 2011 - 08:00 PM

i just picked up a 70s 12 hp suburban and cant get it to start bearly rools over when the plug is in pulled it out rolls over fine checked the valves neither of them are stuck any ideas would be greatly appreciated

#2 bhts OFFLINE  

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Posted April 30, 2011 - 08:17 PM

Check that you have a good strong battery and that all connections are clean.If those don't work you may have a weak starter/generator and a good cleaning of the inside of it may do the trick.

#3 bhts OFFLINE  

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Posted April 30, 2011 - 08:18 PM

And if i have not already said :welcometogttalk:

#4 Sparky OFFLINE  

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Posted April 30, 2011 - 08:22 PM

Just a W.A.G. here , timing clear out of wack on valve cam . Can you check to see if valves are in proper sync?.

#5 MH81 ONLINE  

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Posted April 30, 2011 - 08:37 PM

It could be a bad Starter Generator / bad connections / Battery issues as mentioned before, or you may have a dirty Start pole in the Switch. Had that happen a few times with the SS12 before it just broke. You may want to squirt a little PB Blaster or Aero Kroil in the switch, then work it back and forth. See if that helps.

#6 ace69xxx2000 OFFLINE  

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Posted April 30, 2011 - 08:56 PM

ok thanks i will check all those tomorrow and let you know how it goes

#7 middleageddeere OFFLINE  

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Posted May 01, 2011 - 06:58 AM

Welcome to GT Talk! I have a loose wire on my suburban that makes it turn over slow if I wiggle the wire it turns over normal. I can't seem to figure the fix out yet cause the wire looks fine, I think I will just have to replace all the wires at some point.

#8 ace69xxx2000 OFFLINE  

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Posted May 01, 2011 - 03:41 PM

turned out to be a bad ground wire thanks for the help everyone

#9 ace69xxx2000 OFFLINE  

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Posted May 01, 2011 - 03:46 PM

could anyone tell me how to find the year of this tractor thanks again

#10 MH81 ONLINE  

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Posted May 01, 2011 - 11:13 PM

could anyone tell me how to find the year of this tractor thanks again


Possibly by COMPLETE model number. If you list it, someone may be able to tell you. Last time, I did a little online searching & found a couple of resources that confirmed mine.
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#11 tractor buddy OFFLINE  

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Posted May 02, 2011 - 09:08 PM

where might I find the serial number?

#12 MH81 ONLINE  

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Posted May 02, 2011 - 11:00 PM

Serial and model #'s are usually on the plate near the shifter. they are lightly stamped into the aluminum, so often they fade away. I usually try a little oil or water & shine a light across the numbers, easier for me to see them that way.

#13 BillTheTractorMan OFFLINE  

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Posted May 04, 2011 - 10:04 PM

These engines and S/G(starter/Generators) tend to need a bigger battery to start than the average GT. I don't know about yours, but my engine has 120lbs of compression and it takes all 400 cranking amps to get it barely passed the compression stroke. I re-did all the connections over the winter too which helped some.


Glad it was an easy fix.

#14 ace69xxx2000 OFFLINE  

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Posted May 05, 2011 - 08:25 PM

thanks for the info now its go a knock so it looks like a new engine turns out mine is a 1969




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