Mercury 150 Black Max flywheel/stator removal
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- Опубліковано 11 лип 2018
- This is a video of how to get to your stator on a Mercury Black Max 150 outboard. At 8:04 I say rectifier but I meant Stator. I am NOT a mechanic so this video is ONLY to show how I got to my stator and what was required to do so. Do not take my information here as bible. I hope this helps someone who is searching for answers as I was. GOOD LUCK!
Mine just did this. Found this video and we have pretty much the same engine. It would stall out at 2100 RPMs but would sometimes surge forward and jump to 4k-5k RPMs for a few seconds. It died right at the dock. Omg the cost of these parts! Thanks for putting the video up.
You are correct in saying there is little to no info on these older 150's. Thanks it did help
Thank you so much for that. You are the only one online who showed me how to do this. Awesome Job!!!
Your very welcome Bobby, glad it helped!
Hey Sean. Thanks for sharing. I also have a 1981 Mercury 150 Black Max. I recently purchased the boat and motor and just as yours several of my wires were dry rotted.
As I watched your video while you were removing your flywheel you indicated you couldn't remove the nut by hand even with considerable effort. An impact wrench certainly helped. Just FYI for others you can use a wide chisel or similar piece of metal and insert it between one of the top timimg cover mounting bolts/base to hold your flywheel while removing the nut. I personally used a 1.5" wide wood chisel turned horizontal between the left timing cover mounting bracket and the flywheel gear teeth to hold mine while removing the nut with a 1/2" long handled ratchet. It works pretty well if you dont have an impact wrench.
Another note: If youre only removing the stator you can mark your flywheel tona reference point and remove the 8 smaller bolts around the flywheel nut and then remove your stator.
Just thought I would share this information as to possibly help someone else attempting the job. Once again thanks for sharing your experience!
Thanks Ronnie for your added info! I'm sure it will help someone who runs these motors and encounters these problems. This is one of the reasons I love UA-cam
this was very helpful! I am troubleshooting a 1988 50 hp Mercury and learning as i go! thanks for posting!
Your very welcome! I hope it helps you. That's the way I've learned about my motor was learn as I go. Outboards are actually quite easy to work on and maintain once you learn the basics. Good luck and happy boating!!
good job, I have same problem. Running my 150 Merc at full throttle before she shut down. Good video
Thanks! Yeah my issue was for sure the stator. Full throttle and no power=bad stator. I have a couple follow up videos after my repair. Mine runs better now than when I got it so it tells me it was an existing issue. Good luck with your repair, it wasnt so terrible!
Big help! You did a fantastic job!
Thanks!
FYI Only: The switch box:es had defective as well.
Has been the key to all failure in the past - many service people forget to check them and when we change the 2 switch box :es - the engine start great now every time - this is also the cause to have STATOR failure - so my TIP is - if have START problem on the 150 HP Black Max - check the switch box:es both of them and this save you a lot of headick (replace them true long use) and less start problem for the future for sure... I also START my 150 Black Max every week to be sure is work and run true and water pump works OK as well... Good Luck out there guy's...
Thanks for sharing these videos, I'm putting a new CDI engineering trigger on my Mariner 150 for the same reason.... It seems they all suffer with decomposing wiring harnesses.
Yeah it seems that way but oh baby! Does it ever run like a scalded dog when it's new again. Good luck!
It helped, thanks a bunch. I destroyed pullers trying it in a different manner.
great job ! Im having similar problem on a 2004 90 hp mercury ,dying on full speed and rough idle I had all gas lines and carburators checked Thanks for the tips!
Yeah mine was the same but after changing the stator my boat ran perfect. I replaced the triggers only because the wires were frayed and I was already right there on the repair. I have 2 follow up videos connected with this repair so you can see mine running. Good luck with yours!
Thanks I thought I would need to pull the fly wheel to use engine lift. Watched your vid and found the fly wheel puller is treaded on outside and can be used along with the engine lift ring to lift engine to replace the steering cables. So, different project but your vid helped to see how to lift engine. Thanks.
Lol help is help! I'm glad it worked out for you.
Appreciate the videos... been working thru my '83 Merc 150 XR2. Ran great until the middle of the day, then bogged hard... could still coax it to full throttle here and there, but hole shot was gone and just rough. Getting consistent but what looks like weak spark to all my plugs. Thinking the stator or rectifier is definitely the culprit. Thanks again...
Thats exactly what mine was doing. New stator solved it. Thing ran like a bat out of hell afterwards. Good luck!
Did you ever get the end cap off?
Cheers mate, best way to learn is just a can do attitude, I learned off your job.
You sound like you are/were or know a Seabee. "Can Do"
yeah this was great. thank you for the help. I have the same engine only mine is a 1985. I need to do all the same things to mine. This was very helpful, thank you
Great Job Captn!
The flywheel doesn’t need to be pulled when only replacing the stator. If you take the bolts off that are around the fly wheel nut it will expose the bolts that hold the stator on. Just have to place the new stator in the same position that the old one come from and won’t have to retime it.
Mercury says Never remove any of the bolts from the flywheel!! Danger of flywheel coming apart . It turns 5500 to 5800 rpms. Only remove the nut. And use a flywheel puller as seen. I also don't use impact it can harm the threads . Mercury service since 1983.
I just remove my flywheel using this technique and it worked great! I did not make any marks on my flywheel when i took it off. As long as the stator goes back in the correct position the fly wheel should be fine to go back on anyway?
Looks good man.
Thanks, I appreciate that.
Thank you so much you helped me a lot
Awesome! Your very welcome. Hopefully its not 44°f while your fixing yours like it was when I did mine. Take care
i also rebuilt my fuel pump and that made a huge difference as the diaphragm was old and very loose so the vacuum pressure didn't move the diaphragm when the engine was running. It ran at idle fine but no power under load.
Good job 👍
Great Job; thanks!
Thanks for sharing brother
Appreciate the video. Having the same low power issue. Did you have any alarms going off?
I’m about to do the stator and trigger on my 84 150 will I need to set the timing after?
You don't waste my time at least / THX for sharing / have a Black Max 1989 150 HP / and to see you we all learn something usefully ...
Thanks for that!
what were the symptoms that led you to the stator being an issue?
Great wxplanation
Big help
Good job
Hey @SeanWilson do you have a link for the flywheel remover on Amazon along with the rectifier and stator. I have the same engine model and also need to replace the stator and rectifier
Hi. The stator link is JETUNIT Genuine outboard 9 amp Stator assy Maganet Coil for Mercury 6 cyl 174-5456 398-5454A2 398-5454A6 www.amazon.com/dp/B071CGFG95/ref=cm_sw_r_cp_apa_i_qEzFCbKS9KRKN
The rectifier link is Mercury Outboard Rectifier Replace # 62351A1 62351A2 816770T 8M0058226 www.amazon.com/dp/B071GLYMN2/ref=cm_sw_r_cp_apa_i_3EzFCbDZCAJ7D
The flywheel puller link is Zinger Mercury Mariner Force Yamaha 1 1/2" -16 Flywheel Puller Removal Tool 91-849154T1 www.amazon.com/dp/B075R414NZ/ref=cm_sw_r_cp_apa_i_JLzFCb83888T0
It appears the prices have increased a little bit but still a lot cheaper than a dealers prices. Make sure to look at your trigger wires also. I'd hate for you to replace everything and your trigger is bad. Probably not but worth a look. Hope it fixes your problem, it did mine and man my motor is a beast! Good luck!!
Thanks Sean this is all greatly appreciated. And thanks for your video, there isnt enough videos on these awsome engines out there.
@@11SPOONZ your very welcome Aidan. Your correct, not many videos of these engines but theres not many of these motors out there any more. Not many people realize what powerhouses these motors are. Watch my video of the test drive after the repairs. Man...this motor is awesome! Again, good luck with your motor and happy boating.
Did these parts you changed fix your bogging problem? I have a mariner 150 that wont rev higher than 1200 rpm under a load but will turn 6000rpm in neutral.
Yes it did. If you watch my last video linked to this repair, it shows my boat running like it should again. It runs like new now.
Do you remember the size of the fly wheel puller bolt size? Thanks in advanced. We are having problems with bogging as well runs good with no load. With a load runs excellent till it gets warm and starts to rev high and low constantly.
Heres a link to the puller I ordered on Amazon. It's gone up in price but waaaaaay cheaper still than a dealer cost.
www.amazon.com/dp/B075R414NZ/ref=cm_sw_r_cp_apa_i_JLzFCb83888T0
I cant say for sure on your motor since I dont know much to begin with but on my motor, after I did my repairs, I did whats called a "link and sinc". My motor is carburated though. Just fyi. Good luck on your repairs.
when you remove flywheel to get to a stator and after put flywheel back ,, do you need to set the timer back>? my stator is bad...
I believe some motors do need the timing adjusted but on mine I didnt have to adjust the timing. I put the flywheel back on exactly how it came off. My flywheel has a timing slot on it with marks so I didnt need to mess with it. I did however do whats called a "link and sinc" for my carbs. If yours is fuel injected then I dont believe you would need to worry about that. Good luck!
One more thing I should point out that was pointed out to me by the dealership. If you replace your stator, it is recomended to replace your rectifier also. Its only 2 bolts holding it on and worth the peace of mind to change. I bought everything off of Amazon and saved a ton of money.
Do you by chance have a part # on that stator ?
When you put the flywheel back on do you have to have in a certain position or do you just set it back on and tighten the bolt ?
I made a mark on mine so it would go back on the same as it came off but....mine had a notch anyways so it didn't matter. Mark yours just to be safe, my opinion. Good luck!
@@seanwilson3945 unfortunately i took mine off replaced the stator and trigger and put the flywheel back on not thinking about it and when i tried to start it it backfired like a car does when you have the distributor 180 out so now im trying to figure out how to put it back on correctly
Hey, do you mind providing a link to the puller on amazon? I have the exact same setup on mine and just to make sure I get the right one. Thanks for the video :)
Here ya go. Other links are found in the comments. Good luck!
www.amazon.com/Zinger-Mercury-Mariner-Flywheel-91-849154T1/dp/B075R414NZ
I'm doing pretty much the same wiring work on my black max 175 atm. Do you have a video of doing the stater/rectifier? I don't have my fly wheel off yet, but am unsure about how the wires hook up.
I didnt video it while I changed the stator, just basically HOW to get to it to replace it. The wires though, I took a picture with my phone and then did ONE WIRE AT A TIME. Mine were all color matching for the stator so it was really easy. The rectifier was just 2 wires and I think 2 nuts...I cant quite remember without watxhing my video again to see it. The hard part is getting the stator out because of the flywheel though. You get past that and everything else is cake. Let me know if I can answer anything else. I'll do what I can for ya. Good luck!
@@seanwilson3945 cheers mate, that's already helped heaps. I was having similar performance problems with mine a few years ago and haven't used it since. I just acquired a second hand 150, so in the process or replacing all the wires, before anything else. There's a wire that runs into the top of the head between, the first and second cylinder, but seems to be housed in celastic. Do you know what does and how to replace it? Cheers
@@sammygmuzak7998 if its the same wire I'm thinking of, its for your overheat alarm. Mine is pretty jacked up too and I didnt reolace it because I couldnt figure out how. I'm not running hot though and I have a temp gauge so I dont worry about it. I'm sure thats what wire your talking about.
@@seanwilson3945 yep, thought it might have been temp related, ok won't worry about that. You said you'd done a lot of reading up on these engines, have you got a link for those resources? Thanks
@@sammygmuzak7998 Sammy I couldnt possibly give you all te links and info I looked at because....I litterally looked at almost everything related to and not related to my Merc engine. I basically just pieced information together to get me where I needed to be at. I also spoke to a dealer locally to me as well as a guy at Mercury and they were willing to walk me through some things. Go to Mercurymarine.com for a parts view though if you need it like I did.
Mercurymarine.com then click on
Parts & Accessories then click on
Mercury catalog then click on
launch catalog then click on
outboard then click on (mine is a 2 stroke carb)
I then clicked on V150 and that gave me an exploded view of my engine and parts. It was a REAL help in my process. the guys at mercurymarine.com were a real nice bunch of guys so give them a call if you can. hope this helps you a little. Let me know what else I can do to help and I'll give it a shot.
We have 150 Black Max 1989 / great engine but suddenly NOT start / this is was happen hope it helps somebody out there: Dear Khun Roman,
My mechanic checked and found the stator had defective first so it’s made switch box had defective as well.
We have to check your history, just replace On January 2018 so we are cover warranty.
I have a quotation for repair the engine and install switch on-off as attached.
- For safety and overload fuse pop out if overload to save engine ...
Good video, did it sove your problem?
Yes it did. The motor actually ran better than I ever knew it could. I guess it was giving me warning for quite a while, I just didn't know it.
Was your battery not charging as well as the rough idle
I honestly don't know if it was or wasn't charging. Replacing the stator and rectifier as I did would have corrected that though.
I have a 1985 skeeter with a xr2 black max 150. Starts good with ear muffs and revs up and idles fine, soon as its in water it’s hard to start but will eventually start. Will idle and troll fine but once you go to open it up it either bogs right down and dies or it runs really rough and will eventually die unless you lay off on the throttle. Any tips? Do you think it’s the stator ? Almost every article I’ve read they have mention the stator
It sounds just like the stator. Mine idled fine too but under load it bogged. Look on Amazon for your stator but also change your rectifier also. Good luck!
Sean Wilson thank you so much I’ll let you know on my progress
Also when I pulled it out of my barn last week for the first time in probably 5 years I pulled engine covers off and noticed a huge mouse nest do you think they could have damaged something as well? Also I’ve read they can go into your exhaust and build nest and sometimes that causes it to start hard once in water
Also when you put the flywheel back on how did you tighten nut? Just get it tight with impact or did you use a torque wrench ?
@@troybriannatyler4962 I would juat check all the wires running from your triggers and switch boxes. Mice love to eat the coating but this wire coating also gets dry and brittle. Replace any wires that are like that. As far a smice nests in exhaust...I couldnt tell ya on that. I can only tell ya what I've dealt with and thats not one of them. Have you replaced your impeller? You should and when you drop your lower end you should be able to see up your exhaust. I really doubt you have mice nests in there though. You may also need your carbs cleaned/rebuilt and on my engine I had to do whats called a "link &sinc"
So...if I were you with a motor that sat for that long, I would do the carbs, stator, rectifier, impeller, thermostats and new plugs. Sounds like a lot but to have some peace of mind on the water is a great thing and these old Black Max motors are worth the time. Good luck!
Finally got around to buying a new stator and trigger and rectifier for my 150. Is the wiring on the new jet unit stator match right up to the original one? Do you just match the colored wires
Uh....I don't really know about a jet unit. I bought a CDI unit and they all matched up BUT....take a picture of your wires BEFORE you disconnect them OR do what I did and just do 1 wire at a time to be sure. If they dont match up in color, you can easily determine which wire is for which position. Hopefully they gave you a schematic with a color code but if not, good old Google can answer your question.
There is NO SHAME in taking it slow and taking pictures to look at so you get it right. Make sure when you put your flywheel back on, it goes on in the same position it came off, otherwise your timing will be off. Make marks, 1 on the flywheel and 1 on the engine to line it up after repair. This is really a easy job once you get through it one time. Good luck!
Sean Wilson unfortunately no diagram on the color code. There’s 2 yellow 2 blue 2 red and 1 black so hopefully they match up to my original one
@@troybriannatyler4962 I googled it and they SHOULD match up. I hope Google is correct about this lol.
Sean Wilson I hope so lol same with the trigger wiring
Sean Wilson hey Sean just a quick update , I started tearing into my 150 last night. Flywheel came right off with puller. Got stater off, trigger off and rectifier off got all the new ones on and wired. Half of the old stator wires just crumbled and fell apart and wire exposed through the insulation. All the colors matched up. Now just gotta dig the boat of of barn and try starting it and hopefully it works I appreciate all your help definitely wouldn’t have done this if I didn’t come across your video
What website did you buy this stuff from
All parts came from Amazon.
What’s the part number on that stator
These are the parts numbers that were compatable with my motor. Hope it helps. Good luck.
JETUNIT Genuine outboard 9 amp Stator assy Maganet Coil for Mercury 6 cyl 174-5456 398-5454A2 398-5454A6
A pair of vice grips will hold that fly wheel too, just secure it for a counter clockwise turn an wallah. Now how the hell I get this wheel off. Hmmm
I would NEVER try vice grips. I'd be too afraid of breaking my flywheel and then thats just another $300 bucks and a fee days wait to replace it. Maybe it's worked for you and I'm not gonna knock it, but it is something I'll never try lol. Especially now that I know my impact works so easy
I have question maybe you can help me out or anyone reading this..
I have 1979 in line 6 Mariner when I attempt to start the motor starter engage to flywheel moves clockwise (normal) rotation I believe, but has soon it fires up it Switch’s rotation to counter clockwise what would cause this?