Dishwasher - needs a part (South Heath HP16)

Beko graphite full size dishwasher. Runs through the programmes OK but the water isn't jetting into the machine properly. I spoke to a repair man & he says it probably needs a new motor, which costs about £80. However it would also cost £100 for him to fit it for me, so I bought a new machine instead! If you know how to repair appliances yourself, it would be worth doing, as the machine cost £330 new. It's 4 years old so should have plenty life left in it. Would love to see it put to good use.