I have a 1978 Black Max Mercury 175HP and it wont get above 2500 rpms. The engine runs great in netural and reverse, but when we try to take off the motor starts to kick. The engine also kept wanting to stall out In idle. If anyone knows how to fix this problem or has delt with this situation please respond.
Steve, I am having the same problem with my 1985 175 Mercury. The mechanics at the lake removed all the carbs, cleaned and replace. Thought it was a fuel problem. Motor still will not do over 2000 rpm. The said they called Mercury and Mercury told them most likely is the high stator. I am waiting to get it back in the shop and see if that helps. Good luck.
I agree bad Stator happende on my 1988 max same way. You should change the rectifier and inspect the rev limiter they tend to burn up when this happens. All three were bad on mine. All easy to replace.
You need the mercury threaded puller they are all over the internet this is the hardest part mine was a pain it is just a cylinder that screws into the top of your flywheel in the center. the stator itself is connected to the rectifier and the control box easy to see just match the colors. Then screw the wheel back on and your done. Some people cheat and take the flyweel bolts off I suppose this is not good cause it changes your top dead center alignment when you time your motor.
Well before I spend money at the marina with the whole stator thing, we were talking to some people about what was going on and they told us to try some seafoam. Has anyone ever tried this? I poured it into the gas tank and tested the engine out in the drive way it sounded a lot better, I noticed it's not smoking anymore as well. The engine also was able to get up over 4000 rpms. Were going to take it to the lake Saturday morning to see if it helped if it don't then I'll take the next step. I do want to thank everybody on iboats for their help on this, it means a lot.
If your stator is bad it could be intermitten like mine was runs good then it strands you out in the water I would change it the windings on it get bad over time and your motor is 32 years old. Just a thought.
We just got back from the lake the other day and we cruised arond in it for a little bit and all we could do was 45 mph and, and all of a sudden it just took off we were then doing about 74. I'm thinking that sea foam helped out. It ran great the rest of the day at the lake. Shankforce you could be right the high stator could be intermitting right now.
We took it out the other day and it was doing the same thing not wanting to go above 2,000 rpms. Took it to the marina and they said it was the switchbox. They repaired that and were taking it back to the lake tomorrow. Shankforce you were right it was intermitting.