Our Outboard Mercury 150 Motor will not rise high enough out of the water. HOw do we make an adjustment to make it rise up higher?

SOURCE: Mercury 20Hp impeller/water pump location

It is located inside the lower unit housing. They are fairly easy to replace. Most Mercury authorized service stations will charge around $120 for this task.

Triton72

SOURCE: 9.8 hp mercury outboard shutting off in low idle speed.

My problem ended up being the spring on the reed valve being weak.But at the same time and while I had already had my carb broke down I took a can of carb cleaner to it and cleaned it. In order to replace the spring on reed valve you will have to buy a new one, but don't worry I only payed about $6.00 for mine. You may also look into replacing your primer bulb if you haven't already because may allowing air to build up in your gas line while you are basically idiling.Once you get the carb straightened out you may have to reajust it again. If I might be able to help you again you may contact me at [email protected].

SOURCE: Free wiring diagram for 1978 Mercury Outboard 115 HP boat motor

I have a maintainance manual for this engine (I have the same one) with pages of wiring diagrams. What specific system/area are you interested in, I could scan in the page(s) and email them to you.

Mark

SOURCE: Spark plug gap 150 hp Yamaha outboard

The correct gap is .035

SOURCE: changed the ignition switch on 150 EFI mercury Outboard

just take the old one off and put the new one on just like you took the old one off