Disconnecting oil pump

[ebubeck]

My father has a 1995 40HP Merc with oil injection. He would rather just mix the oil manually. What does he need to do in order to disconnect the oil pump?

 

[Preda]

Re: Disconnecting oil pump

I bought a kit from mercury to do just that with my 150hp they probably have one for your engine too. The kit replaces the gear that drives the oil pump with a plastic piece. <br /><br />Disconnect all related to the oil pump including the link to the carburettor, oil module, oil sensor and plastic tank. In my case there was a vacuum line to take the oil from the boat 2 gallon oil tank to the engine tank. In some engines you may have to jump some electrical connection but I don’t remember having to do that.

 

[orca]

Re: Disconnecting oil pump

G,Day. Yes it can be done, but my question is why? Motors have been oil injected for years , there would be more motors that have failed due to the oil being incorrectly mixed manually than motors that have had oil pump problems, this is especially so with the gear type pump as used on Mercury, Mariner, Yamaha, suzuki and Tohatsu. Thousands of these motors are running all over the world with no problems. As well as mixing the oil the modern two stroke pump varies the ratio depending on motor speed, this not only helps smooth running but keeps some unnecessary pollutants out of the enviroment. There used to be a lubrication system for cars that was called total loss, this was replaced with the oil pump that has been used on all auto engines since the 1920's, you dont see to many people pulling the oil pump out of their motors.

 

[ebubeck]

Re: Disconnecting oil pump

Thanks for the advice, I'll pass it on.

 

[Kenny Bush]

Re: Disconnecting oil pump

Whaley is right. Why????? Us "Oldtimers" saw so many motors stick due to no oil, thay we seem to believe it is no good. But as the years have gone by, the Oil injection system have become perfect. The Mercs of the 90's and on are excellent systems. Premixing is only a waste of oil, pollution, and money. He has alarms on that motor that will go off when it is low on oil, and when the oil pump driveshaft is NOT spinning. These sensor systems are great and proven over the last decade. Please reconsider or reenforce the quality of todays oil injection systems.....

 

[Preda]

Re: Disconnecting oil pump

In my case first the sensor module went bad which I replaced. Then the gear motion sensor also went bad (I replaced that too)and finally the drive gear which is in the crankshaft broke. This meant that I have to disassemble the engine to get to the crankshaft and replace the drive gear. It was too much trouble so I decided to go the premix way. <br /><br />It seems to me that the drive gear breaking instead of the driven gear is poor design. I probably should have disassemble the engine anyway because there may be small broken pieces from the gear inside the engine but as I mentioned it was taking too much of my time and boating wasn't fun anymore. <br /><br />I agree that you shouldn't disconnect the oil injection if it is working fine, just don't ignore the alarms.

 

[Kenny Bush]

Re: Disconnecting oil pump

Man Preda.... You must have bad Kharma.... I have never seen all that happen to the motors of new... What year is your 150?

 

[Preda]

Re: Disconnecting oil pump

My engine came brand new in 1995 with my boat. I can't complain since I finally had to get rid of the oil injection in 2002. Last june the stator gave up but before that this engine knew his way back even though it had a few other problems. We are talking about 9 years of going out fishing at least once a month.<br /><br />I've though about buying a new engine but I am not so sure I'll be able to work on these new DFI or 4strokes engines. They have sensors for everything. The last brochure I received from mercury says that the new optmax computer monitors 40 different sensors as if that was a good thing. Can you imagine having bad kharma with one of those.

 

[Kenny Bush]

Re: Disconnecting oil pump

I here you. I am just now "Dinkering" with the EFI's. I have to run hard sometimes, and the carbs and EFI's are the best/safest to have. They just use a little more fuel/oil. If you put around at the lowest possible speeds, the Opti's are OK, but if laying into them a lot, they tend to go bad when something gets out of spec. Soon everything will be DFI. I guess we better learn quick. Technology will pass us up.