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Starter Fixed thanks for the help!! M1008 6.2L

OK the thing is still jacked up!! I placed a wire from the engine to the frame and tested it. No workie! I hooked the battery pos straight to the starter, no workie!! I checked all the grounds, the volts at the ends of the pos cable.....I don't know what else to do. It is still spinning fast, but barely moving the motor over??? And I mean barely it's not even really trying:(
 
I would have the starter checked. If it is getting good power and the grounds are good the starter should spin the motor over like it should unless there is a problem with it.

Even if it is brand new it wouldn't be the first time the parts stores have supplied faulty parts brand new. Starters are simple. If you have enough volts and good grounds they spin like they should. If the battery isn't the problem and the connections aren't the problem then the starter or the starter solinoid is the problem.

Harley
 
Did I read that correctly? You said the starter was spinning fast, but the motor was not turning over? Sounds like the Bendix is not kicking out the gear drive on the starter and engaging the flywheel, or you have a stripped spot on the flywheel teeth.
 
Rusty K5 is mistaken. Having more batteries absolutey DOES increase cranking speed. Cranking speed depends on the voltage under load. When a starter is hooked up correctly (I'm not sure your's is), it is supposed to draw the 12.5 no-load battery voltage down to the 9 volt range. Anything below 9 volts will be dismal. One good battery might crank a 9.5 volts, whereas two batteries in parrallel will result in a 10 or 10.5 cranking voltage which will spin the engine over must faster. One battery is NOT sufficient - unless you live in the tropics and temp never gets below 80 degrees.
In regard to your cable hookups - I'm not sure what kind of "power block" you have. I'm not up on the military stuff. But, I've got over 20 diesel vehicles, many of the G.M. 6.2s - been driving them for years. You need a good, at least #2 size cable getting to the starter.
I worked as an injection pump rebuilder and diesel mechanic for most of my life (but quit around 10 years ago).
My GM diesels include two 83 K5 4WD diesel Blazers, an 86 K5 4WD diesel Blazer, 87 and 89 V20 4WD diesel Suburbans, 82 K10 4WD diesel pickup, 81 Chevy Chevette diesel (Isuzu engine), and an 83 K5 4WD diesel Blazer I'm building into a small motorhome.
 
We found the problem. It was the ignition switch to the solenoid. My buds came over and did a heck of a job helping out. We installed a push button starter with a relay and all is good:)

Now I just need to button up a few things and test it out before I leave......
 
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