Went to get out of the lake last night and my trim would not come up (no noise from the pump). The pump comes on fine when selecting down. Checked the voltage to the trim switch (both sides) and the voltage is good. Any suggestions? Could a soleniod be the problem? This is on an 1983 Mercruiser, model # 470 (170 hp). <br /><br />P.S. Is there anyone that can tell me how to get this engine to quit vapor locking, its stalling out after shutdown then restarting....... 