[Britwrench]

It depends on what type of service was done. If the timing belts were changed, then the valve adjustment and cam seals should have been done at the same time. If they weren't........

Carb cleaning is part of the major service, once they are cleaned, the float heights done and filter changed, the idle speed and mixture adjusted they should be fine untill the next service...if not there is something causing a problem. The choke cable should not be connected as the system can jam. The warm-up idle speed cam works... sort of.

Needs to have a through PPI with a known 308 technician before even considering buying.