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Discussion Starter #1 (Edited)
So I picked up an IMI 902 starter from Good Vibrations Motorsports and it won't start my 572 with a 10-71 blower. The starter has a 2 kw motor. This is the second starter I bought from GVM. The first one was an IMI 102n with 1.4 kw motor which the GVM tech recommended but both will not start my engine. GVM says they never get any complaints about the IMI starters but when I called the IMI tech they recommended the 902 or 935. So GVM let me trade the start plus the additional cost between the two starters. If I take the IMI 902 back to GVM they are going to hit me with a 10% restocking fee so I want to make sure that I have done everything possible to make sure it's the starter.

I measured the gap between the pinion gear and the back side of the ring gear and it was tight at .020" so I added the circular shim and the gap is now .098" (should be .040" to .100"). I measured the backlash and it's .022" with a .015" mounting block shim. The IMI 902 turns the engine over but it makes a ticking noise just like the 102n did when I tried that one. I have started the engine with two other used starters Hitachi and Tilton and the engine starts right up. So what's the deal has anyone else have problems with IMI starters?

Starter_IMI_902_RingGear_Clearance.jpg

Starter_IMI_902_Guage_.020_Clearance.jpg

IMI_Circular_Shim.jpg

Stater_IMI_902_Backlash_.022.jpg
 

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The IMI 902 turns the engine over but it makes a ticking noise just like the 102n did when I tried that one.
What is this ticking noise you mentioned,, solenoid dropping out or something? Measure battery voltage, then measure battery voltage with key on,, then measure battery voltage as you try to turn the engine over. Best way is if you can get the positive probe on the cable on the big post on the starter, negative can go to any good ground. Maybe you have a connection issue somewhere.
 

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Have you measured the amps that the starter is drawing when cranking? I know it would be a pain in the ass but you could pull the plugs or turn off the ignition for a turn a sec and see how the starter will turn the motor over. Good ground to starter?
 

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Discussion Starter #4
What is this ticking noise you mentioned,, solenoid dropping out or something? Measure battery voltage, then measure battery voltage with key on,, then measure battery voltage as you try to turn the engine over. Best way is if you can get the positive probe on the cable on the big post on the starter, negative can go to any good ground. Maybe you have a connection issue somewhere.
I am not sure about the ticking noise. The starter is engaging and turning the flexplate.

 

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That sound is low voltage. A low state of battery charge or poor connection somewhere along the line. Check that the battery terminals are clean and snug. Also check that there isn't paint or corrosion at your grounding point.

All this assumes you're not using speaker wire for your main leads :happy:
 

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Discussion Starter #6
That sound is low voltage. A low state of battery charge or poor connection somewhere along the line. Check that the battery terminals are clean and snug. Also check that there isn't paint or corrosion at your grounding point.

All this assumes you're not using speaker wire for your main leads :happy:
I put the battery on the charger. So hopefully that makes a difference.
 

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I put the battery on the charger. So hopefully that makes a difference.
If the battery is within it's useful lifespan and the charger is plugged in... should make all the difference in the world.

Good luck :))THumbsUp
 

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Discussion Starter #8
I never could get the IMI 902 to start my engine. So I put the used Tilton starter back on and it started right up. I guess IMI starters suck ass.

 

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I would go with what's working......sounds like a bad connection...and or battery.....I use hitachi starters....extra tooth on them.....you need to get to the bottom of this....you'll eat a flexplate...good luck.
 

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I never could get the IMI 902 to start my engine. So I put the used Tilton starter back on and it started right up. I guess IMI starters suck ass.

The clicking noise sounds like the solenoid cycling in and out because of low voltage. The 'ting' noise you heard is the drive incorrectly engaging the ring gear, either not enough engagement depth because of low voltage or incorrect distance from the flex plate center. What, with that set up, is not stock? Mid plate? Flex plate diameter? What engine is this? GM or Ford? (If I missed this in the post, I apologize). What guage starter cables are you running? How long are they? Is the battery grounded to the block on a bare metal surface? Is the battery fully charged? Any part of this puzzle not being up to snuff will give you problems.
Rob
 

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Discussion Starter #12
I would go with what's working......sounds like a bad connection...and or battery.....I use hitachi starters....extra tooth on them.....you need to get to the bottom of this....you'll eat a flexplate...good luck.
The battery is about a year old and I had it checked at Autozone and they said it was fine. I just don't get it though, if it was a bad connection or low voltage then why would it start with the used Hitachi and Tilton but not the new IMI starter.
 

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The battery is about a year old and I had it checked at Autozone and they said it was fine. I just don't get it though, if it was a bad connection or low voltage then why would it start with the used Hitachi and Tilton but not the new IMI starter.
I feel your pain.....been there. Make sure your battery cables are good....maybe a second opinion on battery condition.....Summit mini new..... Was shit for me.....9 tooth.....switched to hitachi 10 tooth.....made all the difference ......keep us posted.....
 

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The battery is about a year old and I had it checked at Autozone and they said it was fine. I just don't get it though, if it was a bad connection or low voltage then why would it start with the used Hitachi and Tilton but not the new IMI starter.
I'm stumped. Sorry the battery charge didn't do it for ya. For future reference, let us know if ya figure out why it's acting up.
 

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I also noticed in the second video the engine started, but you can hear the starter fluttering the same way right before it lit off. Start or no start, there's still an issue somewhere.

What guage starter cables are you running? How long are they? Is the battery grounded to the block on a bare metal surface? Is the battery fully charged?
X2 Need answers to these.
 
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