Just aquired a Shetland 570 fitted with a bmc 1500 diesel that was marinised by Wortham Blake (I believe its called a Fisherboy) and is mated to an Enfield Z drive. This boat has been sitting on a trailer for the last 10 years and I obviously have some work to do on the engine. My question is can the engine be started whilst the boat is still on the trailer ? I'm thinking of inserting a hose into the sea cock so that the raw water cooling pump can draw water up from a large container. Will the pump (a Jabsco) be man enough to lift the water that extra distance or would it be better connecting a garden hose to the sea cock and leaving the tap running. Any ideas gratefully received.