When I brought my boat out of storage and fired it up for the first time this year (2008 185 Sport with the 4.3 Mercruiser V6), all gauges except the oil pressure gauge worked as usual. The motor was running perfectly for 30 seconds, but the oil gauge read 0 psi. This is my 5th season with the...
After 6 great boating days, on day 7, the engine would turn over but would not start.
It turns out the anti siphon valve on the gas line failed closed, and no fuel could pass to the engine. The valve is located on the gas feed line at the gas tank. $25 part; easy fix.