Dave Kimble
14.05.2021 8:44:44
Lift the impeller up and off the driveshaft. Remove the Woodruff key from the driveshaft keyway and tuck the key in your pocket until needed. Lift the face plate from the driveshaft; discard the faceplate. more
See full version: How to Replace the Impeller on a 150-HP Mercury Outboard
Lift the impeller up and off the driveshaft. Remove the Woodruff key from the driveshaft keyway and tuck the key in your pocket until needed. Lift the face plate from the driveshaft; discard the faceplate. more
Lift the centrifugal slinger off the driveshaft. Remove, with an adjustable wrench, the two 3/8-inch nuts, the one 1/4-inch nut, the bolt and their washers that hold the water pump cover to the top of the lower unit.
Apply a thin coating of gasket sealing compound to the outer diameter of a new pump cartridge insert, align the insert tab with the slot on the pump cover and press the insert into the cover. Wipe off any excess sealant. Lubricate the inner surface of the pump cover with a thin coat of white marine grease..
Inspect the water pump cover for cracks, distortion, grooves or rough surfaces. Replace the cover, if necessary. more
Now im wonderig why the same probs would be,with both motors.I took off the check valve.Screwed into motor with a screen in it?Do you think it could be the res on the boat or maybe the lines mixed up,or even the oil?but both check valves in both motors doing the same thing..not sure?
The question, of course, is how long after the motor is turned off does it stop being normal for the pressure to remain in the tank. There are no Mercury published specs on this, as far as I know. Based upon my own experience, if the pressure remains in the tank for longer than 15-30 minutes after motor shut down, then I would think that the valve is suspect. I have read of other people having "too much smoke problems" and finding pressure remaining in their remote tank for hours or days, which is clearly too long. I will not be using my boat for several weeks, so I can not do an actual time measurement on my own motor right now. Perhaps someone else on the forum may be able to do this and report the results. [links]
You wrote kind of a long confusing narative and I don't know what the "tee check valve" is, but I'll try to answer what I understand.
Re: 2 stroke oil problems mercury 150 [links]
Water pump impellers are the most commonly replaced item on sterndrive and outboard engines. Impellers should be inspected for replacement once per year or every 100 hours of operation. Save thousands by maintaining your cooling system by checking and replacing your impeller regularly. OEM impeller repair kits from Mercury/Quicksilver ensure you're getting the best for your engine and saves you time and money. Refer to your service and/or owners manual for more information.
We have categorized the kits into sterndrive/inboard or outboard to make your impeller repair kit search easier. [links]
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Drive shaft splines lubrication
Water pump impeller replacement 1 , 2 [links]
Fuel system service/inspection 1
Valve clearance inspection/ adjustment [links]
2.5 EFI engines may have as many as 7 fuel filters, remove the cone shaped filter inline below the electric pump. here
Verify oil consumption during break-in by marking the oil tank level. more
After 1 hour running, allow engine to cool and recheck torque. Retorque to factory specs if necessary.
If oil injection is used, replace 2 PSI oil valve and check oil pump bushing and seal.
Clean and refill oil tanks with TCW-3 oil.