removing oil injection in 89 mercury 200 blackmax

[letsbarbq]

Can I remove it. If so, what do I look out for and how do I do it. I have not looked at it yet. Runs fine now. Just want to do it as a precaution.

 

[KIWI MERCMAN]

Re: removing oil injection in 89 mercury 200 blackmax

Lets Bar -b- q<br />Yes you can,you can get a plastic plug that replaces the oil pump and drive shaft. Block up the oil inlet to the fuel system. Remove and plug the crankcase pressure valve that feeds your on board oil tank with pressure.You will need to disconnect the oil warning module or your beeper will be going all the time.It wont beep when you turn the key on anymore once you do this.<br />AND DONT FORGET TO ADD OIL TO YOUR TANK.<br /> <br />Might I ask if this is an 89 model and it's going fine, why touch it? It must be a goodie!<br /><br />Kiwi<br />Safe Boating

 

[SpinnerBait_Nut]

Re: removing oil injection in 89 mercury 200 blackmax

That's a good question KIWI MERCMAN asks.<br />If it is working fine now, why bother it?<br />This has been a great debate here on these forums.<br />To un-hook or not to un-hook.<br />I know that the engine is kinda old and you might be worrying about failure all of a sudden, but that is what the warning bells and whistles are for, to let you know you have a problem.<br />Now if the warning devises have quit, I would have them fixes first before I would do anything else, but if you want to do it just to be on the safe side, then follow above mentioned procedure.<br />I myself would leave it hooked up till it showed me some sign that it was not working properly. But that is just my opinion.<br />If you decide to un-hook, just make sure you get the right mixture for your gas in the tank.

 

[MartyTn]

Re: removing oil injection in 89 mercury 200 blackmax

I have an '89 100HP Merc that I've also debated about unhooking. I was pointed to Rick at www.rickracers.com, and Rick provided me with a blockoff kit the contains the few parts needed. I don't know if your system is like mine, but mine has the flemsy clear oil lines that run from oil tank to oil pump and oil pump to fuel pump. The line from the oil pump to fuel pump cracked on mine, and I didn't notice it because the oil was dripping out of the cowl and into the water. I did notice it when I got back to the dock. I was lucky that the line just cracked so some oil was still getting thru, and my temp guage never indicated hotter-than-normal, so the engine was okay - this time. I'm still debating on whether to bypass or just replace the flex clear lines every couple of years. The warning stuff never made any noise in this case, even though all the warning systems were checked and were said to be okay.

 

[letsbarbq]

Re: removing oil injection in 89 mercury 200 blackmax

kiwi & spinner,<br /><br />thanks for the reply. Yes its a black max 200 and there is nothing wrong with the motor. great motor and want to keep it that way. <br /><br />I remember last July when I was ready to launch my boat and then saw the USCG towing a 23 proline WA with a newer Ocean runner johnson 200. oil inject. quit working, he didnt know, blew up motor, no warranty, 30 miles offshore, 6 hours to get home, no fish. He was pissed. His wife and daughter was too.<br /><br />Had to assist the poor lad and had to just feel his pain. Can't blame me for not wanting that to happen to me.<br /><br />I did not know that the intermitten beeps were the alarm for the oil inj sys. I hear it when you first turn the key. First time Mercury owner. I appreciate the info. honestly did not know. anything else to look for?<br /><br />martytn -- Its upto you. But I know I can fish more easier and run more relaxed on the water if I have one less thing to worry about. That is the oil inj sys working or not.

 

[kenthrussell]

Re: removing oil injection in 89 mercury 200 blackmax

Hi well good idea to unhook . last year blew up a 200 black max 1989 .....no oil! very expensive in rebuilding popped a hole right through the block when she seized and a rod came poking through...............music was playing and didn't hear any alarms. i also disabled it and no more worries. mixed 40-1 is a little much and it worked fine was told that it provided a better seal between cylinders with the extra little oil, the seals between cylinders is actually a steel ring that sits in a groove on the crankshaft and block.........any more questions about this engine i have the factory service manual, not clymer the actual factory manual

 

[MartyTn]

Re: removing oil injection in 89 mercury 200 blackmax

Hi all - I will most probably bypass the injection this spring/summer. Last season I just replaced the bad plastic line and inspected the line from tank to oil pump since I was only going to use it a couple more times before winter. One thing I did do immediately though was to add some oil to the internal fuel tank. I spoke with several folks who have done this to protect their outboards and it is a common practice with one group I spoke with. So when the injection is working the ratio is a little higher at about 40:1 at WOT, but if the injection quits there is still some oil so the temp guage can be a warning before blow-up. The extra oil helps at slow speeds also. I always wondered why the temps were so much higher at slow/idle speed until I read in the service manual that the ratio of fuel to oil at idle was 80:1 and then varied with RPM up to the max of 50:1 at WOT. That fact helped me make the decision to join the crowd and add a little oil. It sure makes me feel better to see the engine not heat up during those long slow/idle runs at marinas, etc. Best of luck to all.

 

[KIWI MERCMAN]

Re: removing oil injection in 89 mercury 200 blackmax

MartyTn<br />Dont be fooled by your temp gauge, it shows you the water temp of your heads, not comp temp. The reason your 200 runs hotter at idle is because of your themostats, not your oil pump. Your water temp gauge sender is in your water jacket on the starboard cly head,if you run out of water it might tell you in enough time ,then again it might not. But dont count on it to tell you that you have a oil problem.<br /><br />Kiwi

 

[letsbarbq]

Re: removing oil injection in 89 mercury 200 blackmax

Martytn,<br />So that is why the temp goes up when I am at low idle. I just became accustomed to the temp needle moving past the middle when I slow idle through a no wake zone. Now that you have mention it. It all clicks to me now. <br /><br />Kentrussel,<br />sorry to hear that about your motor. I do not want to join you so I am going to unhook the sys. very soon. As for the manual, I am due for one. Is there anything on what the cause of a tilt trim leak may be? I tilt the motor up and then over time it will be in the down position. Does it sound like I got a leak in the seals somewhere in the rams? if so, where is it. Is there a kit I can buy to change out the seals? I appreciate any help.

 

[clanton]

Re: removing oil injection in 89 mercury 200 blackmax

LBBQ, The leak down on the Merc tilt/trim is most likely caused by the pilot check valve seal. The Merc manual should show a break down of the pump with valve. The valve or seal not serviced by Merc. replace the seal with a small o-ring, or search this site for 125 Force tilt/trim which has part number for seal that will work.

 

[letsbarbq]

Re: removing oil injection in 89 mercury 200 blackmax

will do that, thank you clanton.