Merc 150 XR2 Blackmax oil pump

[Boo]

Hello to all,<br /> I was looking at my motor and noticed a few drops of oil on the shift levers,I looked up at the oil pump and noticed one of the clear oil lines was busted at the clamp and then noticed the line coming from the oil tank was busted at the clamp also! So today I replaced both lines with clear plastic tubing and bled the line going from the tank to the pump but I'm not sure how to get it from the pump into the mixing line without running the motor. Any suggestions are appreciated. <br /> Boo

 

[LubeDude]

Re: Merc 150 XR2 Blackmax oil pump

Its not a big deal, it should blead itself when you start the engine. But keep an eye on it at first.

 

[Kiekhaeferscurse]

Re: Merc 150 XR2 Blackmax oil pump

Hi Boo, dont know if this helps but you might want to run that engine on a day tank with a 50:1 mix(just till your able to determine that oil is flowing & you have no more leaks) and you can also crack the bleeder on the pump.<br />Cheers<br />P.S. Forgot to mention you might have to bleed your internal tank (front of motor)

 

[rodbolt]

Re: Merc 150 XR2 Blackmax oil pump

hello<br /> after line replacement you need to run on a premix tank. fill the engine tank with oil, fill the remote tank 2/3 full and mark it with tape or magic marker. start the engine and dissconnect the oil link and rotate the pump arm to the wide open spot. crack the bleed screw and allow some oil/air to escape. then watch the tubing until the air is pushed out. this sometimes takes a bit. I usually try to run at least 6 gallons of premix after bleeding to insure its working by observing the remote tank marks made previously. running an entire tank of premix wont hurt.

 

[Scali]

Re: Merc 150 XR2 Blackmax oil pump

Pull it, bypass it, yank it { the pump I mean }<br />I'm doing mine this spring on my 1994 4 cyl Merc 40..<br />It's just not worth blowing the engine over a cracked plastic tube or stripped gear..<br />I cant wait till mine is gone for the peace of mind factor

 

[WillyBWright]

Re: Merc 150 XR2 Blackmax oil pump

Sad to see another boater succomb to the nonsense. <br /><br />10,000 water pumps fail for every failed oil pump. Might as well eliminate that as long as you're at it, Scali.

 

[CU2NITE]

Re: Merc 150 XR2 Blackmax oil pump

I don't know if I would say it's nonsence! These mid 80's oil pumps have a reputation of stripping the plastic gears, and by the time you catch it it's to late! I have two 150 mid 80's black maxs, both oil pumps went bad! I was able to save one, but the other is a salvage motor now. I'll never take the chance again with an older motor. They are great running motors but the oil pump gear isn't reliable!! Mine runs great with pre-mix, and no more worries. Just my two cents.<br />CU<br /><br />---------------------<br />RUNNING THE MOTOR WHILE LISTENING TO THE HORN WILL MAKE YOU MORN!!!

 

[Boo]

Re: Merc 150 XR2 Blackmax oil pump

Hello and thanks to all who've replied. I think i'll keep the motor the way it is. my next question is where's the bleeder located on the pump? thanks again for the info. This site is a great wealth of infomation and greatly appreciated by me.<br /> Boo

 

[rodbolt]

Re: Merc 150 XR2 Blackmax oil pump

the bleeder is exactly where the service manual says. if you dont have a manual say so. also usually those without a manual suffer fried motors due to missed work points. I am with willy. especially on nonV mercs that never have pump or gear failures. its to easy do do maint rather than waiting till it fails. <br /> I see more trashed motors due to customer neglect every year than all the failed pumps from all brands combined. most trashed motors also have inoperative alarm systems.<br /> goes back to maint. a trained tech will test the rotation alarm on that merc as well as the level alarm at least once per year. the v-6 merc has an alarm that if it works will tell the operator that the pump just quit rotating. some shadetrees bypass this alarm or the horn does not work and if/when the failure occurs it quietly trashes itself. an oil failure due to a broken vynil line is NOT an oil failure but a maint failure. whoevereris doing the maint missed a working point.<br />if you have a service manual let us know what brand. if you dont let us know that as well.

 

[Scali]

Re: Merc 150 XR2 Blackmax oil pump

In my case the oil warning module fried last year & the oil lines are due to be changed so instead of investing 100 bucks into the parts & an hour of my time I'm just going to bypass it , she was good for 11 years granted also I prefer the peace of mind of premixing..<br />After a few years bypassing oil injection systems is a good idea IMHO even better yet after the warranty has expired .<br />Those 150's stripped oil pump gears @ high RPM's I bet many people would agree this motor would be better off without it

 

[rodbolt]

Re: Merc 150 XR2 Blackmax oil pump

hello<br /> most gear failures I delt with were either motor temp to high or improper storage.<br /> probably 90% of all the drive shafts I have removed from failed gears show rust. and rust eats the gear rapidly. most of them are on boats that idle a lot before docking. after extended idle then shut down and storage there is just not enough oil on the shiney parts.<br /> but if your more comfortable premixing then remove the oil alarm and shift the tan temp lead to the alarm block on the stbd side of the engine. remove the pump drive shaft and either make a block off plate or just reinstall the pump. remove all oil tanks and pump linkages and remove the check valve by the fuel pump and block off the pressure tap on the lower front stbd side. premix at 50 to 1 and go play.

 

[Scali]

Re: Merc 150 XR2 Blackmax oil pump

Rodbolt,<br />Thanks for those percise instructions on the removal of oil pump. I wrote them down & as soon a winter breaks here on Long Island I'll be pre mixing & have peace of mind that this dang oil injection doest fail & fry my baby ! he he

 

[Boo]

Re: Merc 150 XR2 Blackmax oil pump

Hey rodbolt,<br /> I think my second entry kind of says that I don't have a manual. That's Kind of what this sight is all about, ain't it? Not only to shall personal experiences but know how and helpful hints. I've notice the decline in posts on this site on a daily basis over the last few months. I wonder if it's because of replies like yours.

 

[KCLOST]

Re: Merc 150 XR2 Blackmax oil pump

My opinion is just that, my opinion... But I don't like the oil pump on the black max's.... There is very little room for error when something fails... A gear goes and it could be a serious problem quickly, and being out many miles from a marina makes it even worse... The alarm module can also give out false signals, in regards to the oil pump operation as it uses the switchbox to deliver a signal to the alarm module for comparison purposes of the oil pump rotation. So you "may" have a perfectly good oil pump but the alarm tells you that it's not working properly. The benefits of running premix in most instances outways the benefits of keeping an older oil pump running (as long as you have no fouling issues, which I never have).<br /><br />The theory of keeping the motor running as it was designed is great, but when you are talking about a mid 80's motor with many parts (not just tubing) of the same age that's a different story. The cost of rebuilding those gears isn't worth it compared to premixing and never having to worry again.<br />Less parts=less problems..

 

[WillyBWright]

Re: Merc 150 XR2 Blackmax oil pump

We all get cranky once in awhile. Must've been Rodbolt's turn. You should've seen me blast some guy that's sending a work crew out to a remote location in Alaska with an old classic motor that's been sitting for 10 years. No concern for the safety of his crew whatsoever! He deserved it ... and more! As far as the dwindling post count, normal for this time of year. Hang in there. Good advice is in abundance here.

 

[wilde1j]

Re: Merc 150 XR2 Blackmax oil pump

Boo, you need to know people like Rodbolt, who are very knowledgeable, are not making big bucks answering your questions. If you are really expecting to do any serious work on your motor, get an OEM shop manual. This site is NOT a substitute for a shop manual. Just my opinion, of course.