How To Test Oil Pump On Mercury Outboard

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How to test oil pump on mercury outboard. Cap the line with duct tape. How to test an outboard fuel pump. 1989 2005 merc v6 outboards have an oil injection pump that is driven off a plastic gear located inside the engine block. For example you ll want to check mercury fourstroke 115 oil level with the engine cool but a yamaha 115 should be at operating temperature before you check the oil.

The over heat alarm is a single long beeeeeeeeeeeeeeeeeeeeep continuous. The beep beep beep sound is an alarm for oil injection system failure. Turn off your main electrical cutoff switch that governs motor ignition. Pt 1 force mercury 40hp outboard water pump.

It gives the system a reserve capacity of oil in the event that the engine crankcase vacuum pump fails and no longer pressurizes the remote oil tank. Unclasp the snaps on your outboard motor upper case and remove. Locate the oil inlet line leading from the oil tank to the oil pump. The water pump impeller should be replaced every 100 hours of use or once a season or whichever comes first.

The no oil alarm is a fast beep beep beep beep repeating real fast. Consult your outboard owner s manual which i hope you ve read or at least saved somewhere for the exact oil check routine for your motor because each brand and model is a little different. A video explaining the operation of the oil injection system and what causes the alarm to sound. Low oil no rotation of oil pump shaft 2.

Tag the line with a pre wired paper tag. Here is the link to the. This video gives you a detailed explanation on how to make the oil injection pump a continuous loop on a 1996 mercury 40 hp outboard. These plastic gears can fail at anytime.

Manually pull the oil inlet line from the pump and cap it with your thumb. In the mercury automatic oil mixing system the oil from the under cowling tank is fed by gravity to the oil mixing pump. Move a container suitable for oil storage under the line and drain the oil tank into the container. Replace the water pump impeller and the thermostats.

Mercury outboard low oil alarm switch.