Blackmax 150 steering problem

57chevyeddie

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I was on the lake today running my 1986 Ranger with a 150 Mercury Blackmax. I had two problems. First my oil injector alarm would sound. It would stop when I slowed down and killed the engine, restart and it would stop for a while. I looked for smoke coming from the exhaust and it seemed ok so I would run some more. Could it be a false alarm because the module is faulty or something along those lines. Also for some reason my steering suddenly would not turn right. I could go straight or left, but not right. Fortunantly I was almost back to the launch ramp. I managed to get it loaded on the trailer and back home. Any suggestions? I hate to dissable the oil injector. I believe it can be corrected. Some have said "just dissable it and mix the oil and gas yourself" I believe in keeping the original engineering. It's a nuisance the way it is. I'm thinking something at the steering gear slipped under the dash allowing the cable to get out of synce. I didn't get a chance to investigate either of these problems.
 

SparkieBoat

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3,643
Re: Blackmax 150 steering problem

steering sounds like a bad steering wheel gear case. I would also recommend bypassing the oil injection system and premixing. I would say absolutely that you should premix until you fix whatever is making the alarm. these motors are notorious for this problem and most people just go to premix. there is an box that the alarm wires go to, I forgot what it is called, that could be your problem, if it is not the sensor in the oil reservoir. get it fixed or start premixing, but do NOT run it like it is. that is a great motor, would be a shame to trash it.
 

57chevyeddie

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Re: Blackmax 150 steering problem

If you can tell me what to do to bypass it I will do it. I love the way this engine performs. I can't stand the thought of ruining it over an issue like this. I could probably check the steering gear tomorrow. Maybe it can be corrected also. I'll let you know. Thanks for the reply.
 

jigmister

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Dec 25, 2007
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Re: Blackmax 150 steering problem

just went down this road. I would suggest you find out why the alarm is going off. On my black max it was due to a bad trigger and had nothing to do with oil problem.
The oil alarm looks at the spark to number 3 cylinder (could be another cylinder) and compares that to revalutions of the oil pump shaft.
if its not in sink the alarm sounds. In my case I had no spark to one cylinder causing the alarm.

the float in the oil resivour could be sinking, bad module to mention a few.
I beileve the alarm system to be very reliable.
Is the alarm constant? can you get it to sound at home on the muffs?
 

aussieflash

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Feb 5, 2011
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Re: Blackmax 150 steering problem

Do you have a merc manual?If so there is test procedures for oil alarm/sensor.Just to confirm its a beep beep beep(oil alarm) not a Beeeeeeeep (overheat alarm).My V6 did the same thing and proved to be a spark problem setting off sensor.
 

jigmister

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Re: Blackmax 150 steering problem

do you have a merc manual?if so there is test procedures for oil alarm/sensor.just to confirm its a beep beep beep(oil alarm) not a beeeeeeeep (overheat alarm).my v6 did the same thing and proved to be a spark problem setting off sensor.

x 2
 

aussieflash

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Re: Blackmax 150 steering problem

I also had to replace Trigger,unfortunately both switch box's as well.
 

sschefer

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Re: Blackmax 150 steering problem

The oil problem is probably just the sensor in the upper tank. It the upper tank isn't full then it could be the check valve on the block that is used to pressurize the lower tank and push the oil up to the upper tank. Are your familiar with the process for filling the upper tank?.

As for the steering. I think I would pull the steering rod off at the motor and see if the motor turns freely. If it does then it's definitely your steering if not then it's probably in the lower mount area. Even if all the bushing were shot in the upper end of the swivel pin it would still turn but if the lower end rusted out and you lost the snap ring you could see some binding. Truth be told I doubt it's at the motor.

If you're going to race that motor then pull the oil pump otherwise, leave it. They are highly reliable and rarely fail. The horror stories you hear are from the few that failed. You'll never hear about the many that have lasted forever. Besides, do you really want to mix gas!!! Noooooo.
 

SparkieBoat

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Re: Blackmax 150 steering problem

plenty of post in here on how to bypass fuel injection..some include how to remove the pump and cap it.
 

57chevyeddie

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Re: Blackmax 150 steering problem

The alarm was constant. When I slowed to a stop and killed the engine it would go off for a while. The boat has sat for a few years. Maybe it needs a water pump impellar. I have a stream from the pee hole. My temp guage did up above normal I noticed. I was not aware that the constant beep was temperture. I guess my oil injector is ok if I don't here the multiple beeps. The temperature make more sense. I have a manual, somewhere. I put it up so I would'nt loose it. I'll check for spark on all 6 cylinders. Thanks for the heads up.
 

jigmister

Petty Officer 1st Class
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Re: Blackmax 150 steering problem

spark loss will not trigger the temprature alarm. BEEEEEEEEEEEEEEEEEEEEEEEEEEEEEP constant.

bad module or grounded temp senser wire are possiblities. the way you describe the problem I bet its not a false alarm. the engine is getting hot.
 

57chevyeddie

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Re: Blackmax 150 steering problem

Does it sound like I need to replace the water pump impeller. The motor pivots freely with the steering arm disconnected. When the arm is connected I have a full turn of my wheel to the left. When the motor returns to center the steering locks up. I can't get the motor to go right at all. Would there be a link on this forum how to check the steering. I found my manual but it has very little about steering cables in it. Thanks for the reply.
 

57chevyeddie

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Re: Blackmax 150 steering problem

Ok. I'll need a guide to help me. My lack of experience is telling me to get help.
 

SparkieBoat

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Re: Blackmax 150 steering problem

if you are near savannah ga..I will be back in town next week and will be glad to help you.
 

57chevyeddie

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Re: Blackmax 150 steering problem

Thanks. I'm not close to Savannah but I wish I was. The cables are 12 feet long. I watched a video and I believe I can change it out myself. It looks as though it was originally a single cable. It's had another added. Should I go with the teleflex dual cable. A buddy changed his to a Seastar hydraulic system. I'm not sold on it. The teleflex system looks like two cables on one rack. My old system has two racks under the helm. The new teleflex looks like a good system. Whats your opinion. What all should I order to fix my impeller. For example do I need gaskets or any other replacement parts inside the lower unit. Just want to make one order and get everything I need. Would you replace the temperture sensor or the module that controls the oil injector and temperture warning horn. maybe all of the above. I'm stil a little new at this. I appreciate the assistance. I'll be back on the water soon!
 

j_martin

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Re: Blackmax 150 steering problem

Thanks. I'm not close to Savannah but I wish I was. The cables are 12 feet long. I watched a video and I believe I can change it out myself. It looks as though it was originally a single cable. It's had another added. Should I go with the teleflex dual cable. A buddy changed his to a Seastar hydraulic system. I'm not sold on it. The teleflex system looks like two cables on one rack. My old system has two racks under the helm. The new teleflex looks like a good system. Whats your opinion. What all should I order to fix my impeller. For example do I need gaskets or any other replacement parts inside the lower unit. Just want to make one order and get everything I need. Would you replace the temperture sensor or the module that controls the oil injector and temperture warning horn. maybe all of the above. I'm stil a little new at this. I appreciate the assistance. I'll be back on the water soon!

The oil alert system has an output that grounds the alarm circuit, sounding the alarm, in a pulsing beep if it's working right. Also the overtemp switch will ground that same wire, sounding a solid alarm. Other than the common alarm circuit, the two systems are completely independent of each other. Sounds like you are actually overheating and need to address that issue before you run it any more. I'm guessing you have an XR2 V6 on it. If so, the common point is the terminal strip above the switchboxes.

On steering, the dual rack teleflex is the minimum cable steering on that engine/boat combination. The reason is that two cables properly adjusted are needed to keep the motor stable enough at high speed to prevent chine walk. Hydraulic is also suitable for that application. The new teleflex dual cable is a NFB system and is very nice. The old independent rack dual system was actually slightly more adjustable, but the new one is tight enough in the rack to get the job done. Somebody will try to sell you a dual drum system (cheaper). Don't go for it. It's bad enough hitting the lake at 60 mph, but going through the port gunwale first really hurts. Steering is real important on a high performance boat.

The most likely problem in the old system is one cable is frayed. Usually it will be the rear cable as that one has the most bend in it at the stern. They are not made any more, but can sometimes be found used. They can also be relubricated, but that's a whole 'nother story. Do a search. If you've forced a lot of grease into the zerks on the motor, you might have hydraulically locked one of the cables. The cables do not require grease and in fact will fail if greased. (From teleflex support, after I hosed a new system in a year. BTW, that's when this bullheaded redneck figured out how to clean and relube them.)
 

57chevyeddie

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Re: Blackmax 150 steering problem

The teleflex dual pro cable will be here Thurs. along with the pump kit. I'll keep you in the loop.
 

57chevyeddie

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May 7, 2011
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Re: Blackmax 150 steering problem

I got the teleflex dual pro cable steering on this weekend and it feels great. I also put a pump kit in. I had a couple of gaskets, some large o rings, two small fiber washers, one 3/4 inch I.D. o ring, and a small 1/4 inch rubber seal left over. I found an old 5/8 I.D. o ring laying on the shop floor, below my transom. I looked close to be sure I put back everything as it came out. The parts must be extras. I couldn't tell where the 5/8 ring came from. I didn't understand how to line up my shifter and the prop rotation. When I got the lower unit on it wouldn't shift out of reverse. I think I had the lower unit in forward and the shifter in reverse. I need to figure out where this o ring came from and replace the speedometer tube so I stopped. The 3/4 inch o ring fits around the shaft. I don't see a groove for it. The Clymer shop manual mentioned tapeing the "o ring groove" so the seal in the pump housing didn't get scored when you slide the housing over the end of the shaft. I didn't see any o ring groove. It also said to tape the teeth on the shaft to protect the seals. My questions are. Where do the extra parts in the pump kit go? Are they for various applications? What's the best way to sync the shifter and lower unit rotation? Where did the 5/8 o ring come from? where does the 3/4 o ring go? This is a Seierra pump kit number 18-3319. Thanks for the advise on the steering kit it seems like a quality product.
 

57chevyeddie

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May 7, 2011
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Re: Blackmax 150 steering problem

I talked to a tech. at Teleflex and assured me the extra parts are there because this same pump fits different motors. I'm still not sure where the 5/8 0-ring came from. Is there a link to a parts breakdown of my motor? 1986 Mercury Blackmax 150hp. XR2 V6. I think I read a post that explains lining the shifter and lower unit up with both in neutral and move the lever forward slightly to get the final 1/2 inch or so. That's what I'll try. I got the tubing for the speedometer.
 
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