Compression test mercruiser 3lt
Been looking at how to do a compression test on engines.
So far I understand to do this test:
1. Seems you need the compression test gauge+hose and correct adapter.
Fit compression gauge in spark plug hole, turn engine 5 times and read the gauge.
2. Before the test is done I understand you need to disconnect the ignition from the engine to stop it firing. Also disconnect the fuel.
For 2. above does anyone know where the connections are located and how to disconnect them?
If you feel you can offer any further advice please do.