Koshin Hidels Petrol Water Pump, Faulty

Skylarc Ref B173433

Koshin Hidels Petrol Water Pump.
Pump model No.SE-80X.
80mm diameter connections.
930L/min delivery volume.
26m total head.
Powered by a Subaru Robin EY20 petrol engine.
Condition - Pull cord will not fully pull out, engine jams when cord pulled out a out half way. Engine will not start. Unknown if any other faults.