Original poster here - This powerhead came from Blackbird (1 outboard) They had it for almost 3 months (promised 2 weeks) It never ran well, always bogged down and now it is toast after overheating. The mech said the impeller was worn and old, although part of the rebuild was supposed to be a new impeller. The first time I started the engine, it could not hold idle. Checked the plugs and they were used and the wrong type. $3500 does not go far these days.