RE: Varying Idle Speed

[Davies William-qswi646 <QSWI646@email.mot.com>]

Bob,
        I've no experience of this particular carb installation (we had twin
SU on all Spits in the UK), but the 2 main causes of varying idle speeds in
my experience have been:

1 - Sticking throttle cable

2 - Air leak on the induction side, ie., around the carb mounting or the
manifold to head joint. I guess air being drawn through a worn throttle
shaft could give a similar symptom. DPO's have a habit of not tightening the
two almost inaccessible manifold nuts between the Intake and Exhaust
manifolds on the 1500.

        Hope this helps,
                Bill.