Re: lean fuel
See service bulletin 2063 dated 12/82 for fuel pumps, and hoses. Orignal pumps and hoses did not supply enough fuel. Should have OMC needle and seat in carb, some aftermarket may not flow enough fuel. Service bulletin 2159R1 dated 10/86 timing must be retarded 4 degrees from orignal spec for 88 octane fuel, otherwise 91 octane required. Check diode in power packs.