Hello Iam a newbe here. Iam thinking of buying a 1987 sierra with a 4.3L v-6 GM mercruiser.<br />There is a problem with the boat stalling. he said there is something wrong with the drive unit, something to do with the clutches.<br /> He told me the engine will start, no problem. when you try to put it in gear, it sometimes will kill the engine. Also, it may also kill at anytime while the engine is idling in neutral as well. It can run with no problem for a period of time, and it may also stall after a minute or less after it is running. Either way it will have to be looked at and repaired. The worst case scenario is a complete rebuilt unit will set you back at the most $1500. It may also be a simple fix for $500 or less. <br /> <br /> <br /> <br /> <br /><br /> <br /> <br /> <br />Vehicle Description <br /><br /> 1987 Sierra 180 ski/family boat