This is how I would do it. Firstly ask for make and model of engine involved with this info I should be able to ascertain the following. 2 or 4 stroke
, type of injection system, aspiration system, compression relief system, known engine make problem areas, motor configuration. Ask owner/agent type of exhaust
system fitted, final drive type, type of cooling
used ie raw water
, heat exch, mounting system. Hopefully armed with this info a relevant job plan can be put in place.