Then they brought in a chap with 40 yrs. on the job.
He inspected the engine very carefully, top to bottom. After looking things over, the guy reached into his bag and pulled out a small hammer.
He gently tapped something. Instantly, the engine lurched into life. The engine was fixed!
7 Days later the owners got his bill for £10k.
'What?!" the owners said "You hardly did anything. Send us an itemized bill."
The reply simply said - tapping with a hammer - £2
Spoiler:
