doing away with the oil inj, system

steplift20 · #1 11-23-2013, 09:22 AM

first ---- its a 1988 150 black max mercury out board
i want t o do away with the oil inj, system. the reason is i replaced a check valve in her that was supposed to solve the problem the engine was getting to much oil and would not start, when i did get her running it would smoke alot[i mean ALOT] so i think im going to just add the oil to the gas but what and how do i eliminate the system
1st take the two tanks out
2-then what? i have alarm systems and im sure there must be hoses some where but i would love if i can get a step by step on how to do it
any help would be appreciated cause then i dont have to worry about valves and hoses and leaks
i still have alot to do to my baby but i will get it done
thanks

randlemanboater · #2 11-23-2013, 12:17 PM

The one Merc 150 I owned didn't have oil injection so I have no experience but I did a Google search and found a few things to look over.

https://www.google.com/#q=how+to+dis...rcury+outboard

I'm sure Spare or Therm will chime in soon. as well.

phatdaddy · #3 11-23-2013, 01:50 PM

like rmb said. the big dogs will be along soon. they used to make a kit with a plate that plugged the hole when you pulled the pump. cap the line going to the fuel line, cap the pulse line going from the block to the remote tank and i think just unplug the wire to the pump & the cap on the onboard tank. doing this from memory, so might have missed a thing or two.
i have a 94 mariner that i am still using the oil injection. it smokes like willie nelson's bus for about 2-3 minutes, then clears up.

steplift20 · #4 11-23-2013, 04:48 PM

randleman great articles thanks now i have some where to look for advice but any one else that actually did it would be great advice, is it hard to do?

spareparts · #5 11-23-2013, 05:08 PM

easy way: loop the oil line around from the inlet side to the outlet side of the oil pump, disconnect the wires from the oil tank, oil pump sender and the oil alarm module, ditch the module.

next best way, remove the pump, pull the adapter out, pull the gear out, put the oil pump back on, ditch the sender and module.

Best way, order the oil pump block off kit from Mercury, follow their directions, ditch the electrical stuff.

The mercury kit fills the void left from the removal of the oil gear and adapter, ensuring equal crank case volume for better power and cylinder balance, It will also prevent the drive gear bushing from falling out(never seen it happen)

steplift20 · #6 11-24-2013, 11:31 AM

thanks again you guys are the best i will be doing that so i dont have to find out why my motor gets full of oil when i let her sit, i replaced the pulse valve [check valve ] and was told that was the problem only to have it ha[[en again the only other choice i have is to disconnect the system

phatdaddy · #7 11-24-2013, 01:22 PM

even with premix, you will still have a lot of smoke on a cold start up, just the nature of the beast. and more smoke while idling because your mixed at 50:1. trade off is you will have peace of mind engine is lubed properly.

spareparts · #8 11-24-2013, 03:01 PM

my 60 would do that, turned out to be a bad seal on the oil pump itself, it would leak oil into the bottom cylinder(oil pump mounted lower on a 60), when i went to crank it, it sounded like the starter was bad or the battery was low, once it fired up, it would kill mosquitoes for miles around. Let it sit for a few days, pull the plugs, see if oil spews out of one hole(#2?), it would probably leak down thru the sealing rings as well, so don't be surprised if it comes out of all the cylinders. I ended up replacing the oil pump with another one, it fixed the problem

Destroyer · #9 11-25-2013, 03:06 AM

I am lazy and really didn't want to bother with the hassle of premix. I like the ease of just pumping reg gas into my tank and then having the engine do it's own mixing. But, like everyone else with an older Merc, I was afraid of that plastic gear that drives the oil pump breaking and me suddenly being miles offshore with a busted engine. My solution was to purchase and install an electronic oil injection system from Marine Solutions, Inc.

http://www.marinesolutionswi.com

The actual installation took me just over an hour. The unit comes with instructions and everything necessary to do the changeover, even including a new set of spark plugs. (NGK BUZ8H) The system works like a dream and I could not be happier. No more worrying about no oil in the engine, and no more wondering if I put the right amount of oil into the gas tank. You might want to consider this also instead of disabling your oil injection system. Just my .02 cents

garbubba · #10 11-25-2013, 11:21 PM

When I first was looking at my 1987 V20 with 94 Mercury 200, a friend told me about the nylon gears and to be careful. I bought the boat. about a year later the gear went out (in the harbor!) I listen to alarms & so had the chance to do what my friend advised at first, Neuter the beast!! Yes, it smokes at start up & idle, I drag a trawl & have some issues, due to lugging at a slow speed, but a short fast run & all's well. Otherwise the sucker is a beast! Never expected the engine to last 5 years, here I am 15 years later, & it starts on every turn of the key.