starting issues

[twin plugged targa]

Hi Guys,
I have finally been reunited with my 911 after 3 yrs absence and we are relocated to S France!!!.
New home and plenty of twisty roads with spectacular scenery to follow.

I am currently trying to figure out why my engine turns over slowly for the initial rotation of the starter motor?. After the initial rotation, it turns over normal (faster) speed.
I wondered it it could be due to a High compression motor? (10:1).
I still have the dual battery system but want to change to the single battery- but am leary to do this before I can start properly on 2!!.
I need to go single battery to fit an oil cooler in the front right wheel arch.
I have checked the battery connections and have removed the batteries for independant charge. I have not load tested the batteries - but guess this maybe the next step.
Possible starter motor problem? or do they either work or not work?.

Any help appreciated
Rgds Ben

[Paulporsche]

South of France. Send us some pics when you get there.

I think you should test your batteries as you mentioned, but I'm leaning toward an old, dried-up-grease starter/solenoid being the problem, coupled w/ your compression.

I recently put a new high torque starter on my 77, w/ hi comp (10.3:1) engine. Works great, even in the cold.

[Wil Ferch]

Montpellier area ??....... fantastic !!

- Wil

[RoninLB]

load test the battery.

an over advanced ignition timing will cause that also.

[twin plugged targa]

Thanks, I will try all of the above,
Will, I am actually in a village called 'Roquefort Les Pins', which is 30mins inland from Cannes and 30 mins from Nice. It is also 1 hr from Monaco.
Once I am settled here and the car running right I will try and post pics!.
Ronin, you may have a point with the timing as I need to try and adjust it as I beleive it is running rich.
The batteries appear in good condition although I will have them load tested.
Thanks again guys.
I will try and get onto testing these issues and post soon.
Rgds Ben