It won't turn over!!

[tikihut]

Well its been a long road and the moment of truth is finally here.
With help from both Richard Parr and Clewitt today I was at the point where i thought we would here it run.. Nothing. Spent the next 2hrs. checking ground/wiring. Checked the starter while the motor was being rebuilt ..all good.Jumped the starter, it spins but docent engage the ring gear.?
So here i am. 2 good batteries, new motor and not sure where to go .
It looks like the previous owner had an alarm system. Food 2 toggle switches under the dash but nothing happens.

Any help.. Please!

[john walker's workshop]

Seen a lot of positive clamps that were not swaged well onto the cable. Crimped with big visegrips hard as possible and starter worked. Are you sure the ring gear is on?

[tikihut]

not sure what you mean by ring gear on? like on the flywheel?

[pmax]

Mr Walker's asking if you forgot to install the ring gear.

[tikihut]

ah.. no. it was complete from the builder.

[pmax]

There are port holes around the tranny bellhousing you can take a quick look .... just to confirm.

[Hx911]

i have seen starters where the mechanism that engages the starter pinion into the ring rear has failed. usually sounds like 'klunk whirrrr'
So even if the starter motor turns over, if the pinion does not move to engage the ring gear, the motor won't turn.
Disclaimer - my experience here was not with Porsche 911 starters

[tikihut]

thank you all for the input ! Ill Have anther look

[cmcfaul]

wrap a cord around the pulley a few times and pull real hard.

works on my other air cooled engine

Chris

[Walter_Middie]

Are you sure the ring gear is on?

not sure what you mean by ring gear on? like on the flywheel?

Mr Walker's asking if you forgot to install the ring gear.

ah.. no. it was complete from the builder.

Here's what they are asking. In the following photo, there is no ring gear on the flywheel. With the starter installed, the starter would just spin without resistance, and the engine would not turn - look closely at the outside of the flywheel:



This is what it is supposed to look like - you can now see the teeth on the ring gear:


Pmax says

There are port holes around the tranny bellhousing you can take a quick look .... just to confirm.

[porsche930dude]

I think maybe you didnt jump the starter correctly. It is possible you jumped the motor but not the bendix solenoid so it didnt kick out.

[911 SLANT]

If he installed with no ring gear the flywheel bolts would be to long and hit the case behind flywheel when turning over. Ask me how I know?

[john walker's workshop]

Some do, some don't. Depends on thick or thin ring gear.

[tikihut]

Sorry for the delay getting back to yall...yes the ring gear is on. went through all the battery terminals...and the pos term. was the worst. Pulled the a/c

[tikihut]

vent from under the driver dash to access the ignition switch. With the key on I have no power to the yellow ignitor wire to the starter.
Not sure where to go besides deeper!

[tikihut]

as always! Thanks for the input

[john walker's workshop]

Yellow wire gets power when key is turned all the way clockwise, not just with ignition on. If you get battery power into rhe switch at 30 terminal, you should get yellow wire power out at 50 terminal. Could just be a bad switch.
Stick a pin in the yellow wire and jump 12 volts to it and see if the starter works. The yellow wire is often cut and each end run through an alarm module. Any sign of splcing?

[tikihut]

Well Here's what I found. Apparently the previous owner had a security system . I disconnected the wires to the relay and installed a jumper. Im now getting 12v to the yellow wire but still doesn't turn the starter. As for the hardware and wires do i just start pulling it all out? I don't want/need the systems. Would prefer to keep it simple.

[JSV798]

What do you mean by jumping the starter? Did you short the two terminals on the solenoid? If so this could be your problem: you are by-passing the solenoid. The solenoid connects the two large terminals on itself but ONLY after it has levered the starter pinion into mesh. Looks like the solenoid is not working. How did you bench test the starter and solenoid?
Suggest you remove the starter, connect a thick jump lead from the (+) battery terminal to where the black battery lead connects on the solenoid and another thick jump lead from the (-) battery terminal to the starter motor body. You now need a wire on terminal 50 (spade connector most likely) on the solenoid and then touch this on the where the (+) battery lead is connected. This will simulate turning the key to start. Expect some sparks! Starter pinion should move out and starter spin.
Report back.

[JSV798]

And where are you getting 12v on the yellow wire? Is this the yellow wire at the solenoid end? Have you pulled the yellow wire off the solenoid and got 12v when turning the key to start? Again, suggests faulty solenoid if it is getting 12v at terminal 50 and the starter not turning.