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Subject: Slow cranker

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Tom    Posted 02-04-2018 at 18:56:58 [URL] [DELETE]        [Reply] [No Email]  
  • Slow cranker
  • My 901 gas job cranks real slow. It has a fresh battery (12V conversion), new battery cables, and new starter cable. I've cleaned all the connections, switched to lighter weight oil, added a block heater and it barely cranks fast enough to start at 30 degrees. Any suggestions? Could the starter be worn out? Adding a jumper pack doesn't seem to speed it up much.

    Tom    Posted 02-05-2018 at 15:03:15 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Update Slow cranker
  • Yeah, I load tested the battery, but the fact that the jumper pack had little/no effect was the clue that it wasn't the battery. Local starter shop rebuilt it in less than an hour and now cranks like a champ! Thanks everyone.

    36 coupe    Posted 02-07-2018 at 08:46:03 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Update Slow cranker
  • I have 2 meters that read starter current draw.You can buy one for 8 bucks.Have used them for 60 years.They are iduction meters just hold them against the starter wire or generator lead.

    Jack - Iowa    Posted 02-08-2018 at 07:54:06 [URL] [DELETE]        [Reply] [Email]  
  • Re: Update Slow cranker
  • I've been looking for an induction meter for some time. Just found a set of Blue Point MT1009 meters. 0 - 100A for charge testing and 0 - 600A for starter. Priced at $29.95

    That is not bad but if you know of a source for $8 for the starter draw only, that would be better.

    My email is open.

    Thanks,

    Jack

    36 coupe    Posted 02-08-2018 at 19:06:46 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Update Slow cranker
  • my email is useless.Call Kitts industrial tools at 1 800 521 6579 for a catalog.I posted this many times.A fellow didnt like their 25.00 min order.Shipping is high but what else is new.I always spend more when I order tools.

    Jack - Iowa    Posted 02-09-2018 at 07:39:54 [URL] [DELETE]        [Reply] [Email]  
  • Re: Update Slow cranker
  • Thanks!

    R Geiger    Posted 02-05-2018 at 16:44:47 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Update Slow cranker
  • Thanks for the update, Glad you got it working!

    Tony    Posted 02-05-2018 at 10:59:58 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Slow cranker
  • Have you actually tested the battery? I assume all cables are secured bright metal to bright metal

    Specific gravity to start.

    Put a charger on the battery and note charging voltage. Fifteen volts indicates a partially sulphated or sulphated battery. Replace it.

    If you don't have a load tester capable of loading to 200 amps, no worries, do an individual cell test with a volt meter and follow it with a cell voltage drop test under load. Perform with a fully charged battery. Static, all cells 2.0,-2.3V no exceptions.

    Pull a couple of the plugs and turn on the lights for the load test. Wing it over One cell below 1.75-8V under load, replace the battery.

    Sometimes a battery will test OK under a quicky full load test, but lose umphhhh! after the first or second rotation of the engine. Bad cell. An individual cell test will identify which cell is bad.

    If the battery passes, have the starter tested. You can bench test all but the armature, unless of course you have a growler.

    Tony

    Dean    Posted 02-05-2018 at 12:05:01 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Slow cranker
  • Relatedly, modern computerized battery testers are not to be trusted. False "goods" are not uncommon.

    If you want to know how a cranking battery will perform when cranking, you will need to use a GOOD load tester.

    Dean

    Tony    Posted 02-05-2018 at 15:22:16 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Slow cranker
  • You're correct Dean.

    I have old Sun Tester that will load to 300amps. Big leads, big clamps, and an accurate voltmeter..

    Tony

    Dean    Posted 02-05-2018 at 10:42:38 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Slow cranker
  • Of course you will want to have the battery tested and verify that the battery cables are properly sized and all connections are clean and tight.

    Aftermarket starter? Aftermarket starters are not built to the same quality as are OEM starters. Disassembly will indicate that the brush cables are of considerably smaller size. Most likely, the windings are as well.

    I too had a slow cranking 9 series tractor with a new aftermarket starter. All else was good. Rebuilding an OEM 6V starter solved my slow cranking problem. My tractor was 6V.

    Finally, always depress the clutch and lower the touch control lever completely when cranking.

    Dean

    Tim Daley(MI)    Posted 02-05-2018 at 08:45:02 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Slow cranker
  • It sounds like a weak battery or bad wiring to me but don't guess -get them checked out. What's a 'jumper pack'? I'd start with the battery. A 'fresh' battery means nothing -definition also needed. Even some new ones are bad, and bargain house brands have poor lifespans. Get the battery checked at a trusty, local starter/alternator shop. It must withstand a charge under load and they have the test equipment to verify the condition. There usually is no charge (no pun intended) to test it. The next issue I'd check is the wiring. You say it is a 12-volt conversion. There is nothing wrong with that, but many 12-volt conversions are done improperly. New battery cables are fine if they are the 12-volt gauge class. You can use JMOR's wiring pictograms to get an idea of how the wiring should be connected -look at the NAA sketches for reference. I'd look into these issues first before pulling the starter. Your trusty shop guy can also test the alternator and starter too.

    Tim Daley(MI)

    Jack - Iowa    Posted 02-05-2018 at 07:46:05 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Slow cranker
  • I'm with Bob. Try pull starting it if possible. If it starts easily by pulling look at the bushing in the starter.

    Dollar Bill    Posted 02-05-2018 at 05:02:56 [URL] [DELETE]        [Reply] [Email]  
  • Re: Slow cranker
  • I would do a load test on the battery - Not uncommon to be faulty when new. Next item would be as RG posted - Starter dragging.

    R Geiger    Posted 02-04-2018 at 23:27:29 [URL] [DELETE]        [Reply] [No Email]  
  • Re: Slow cranker
  • If you can find a mom and pop starter repair shop, they can test it for you.

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