Lazy Starter

G'Day, looking for some help with regards to a what I would term a "lazy starter" (ie) not turning my diesel brute fast enough to start??
I have a 1983 Series IIIS which is a South African model, it has a 3.8 ADD Atlantis diesel engine installed, which is esentially a Perkins, made under licence.
The Starter motor in just about 6 months old, the battery which is the biggest truck battery I could fit under the bonnet, (yes wouldn't fit under the seat) It used to turn over a lot faster.
My question would taking a direct earth from the battery to the starter help in anyway, I have replaced the earthing strap from the body to the motor. the battery has lots of power although it's two years old, cheers
Rgds.
John Mac

How many CCA's is the battery?

I had the same problem with my 2.25, there was a bad contact from the body to the engine if I remember correctly, take the earth directly to the starter I am sure it will help! Join 4x4community.co.za, lots of local info and Landie guys!