Resolved 1985 mariner 175 powerloss on top end

[Sprky]

Re: 1985 mariner 175 powerloss on top end

Re: 1985 mariner 175 powerloss on top end

Sorry Terry, I didn't get back till late last night. I will dig up a trigger and packs and send them to you to try.



Chris

 

[fisherman81654]

Re: 1985 mariner 175 powerloss on top end

Re: 1985 mariner 175 powerloss on top end

Keep testing the triggers.

Whack the throttle and watch trigger output. CAREFUL, do not hold the throttle open, just whack it to see the voltage rise with RPM, repeat on each trigger.

Did you try moving the timer/throttle during the cranking tests to see if any change with wire position?

The trigger is beginning to look suspicious, but without solid evidence I still don't recommend replacement until a few more tests continue to show low readings.

Tested the trigger, all of the trigger wires,while moving the advance,they all check out fine.
Outside box 1.7 1.6 1.8 dva inside switchbox 1.6 1.9 1.7 specs say 1 to 2 volts.

I did a test on the coil wires on the switchboxs: Outside switchbox coil wires were 148 149 149. Inside switchbox coil wires were 154 163 158 dva volts. Specs say 150 dva volts or more.
The outside switchbox was close to specs but not there. A bad switchbox?

 

[fisherman81654]

Re: 1985 mariner 175 powerloss on top end

Re: 1985 mariner 175 powerloss on top end

Hate to post this but I will,maybe it will save someone else some greif.
I did another dva check on the (new) stator. The blue wire was 213 dva volts,specs say 180 or more.The blue/white wire was 199 volts.Specs say 150 or more. The red wire was 24.1 volts.Specs say 25 volts or more:facepalm: The red/white wire was 25.1 and the ohmcheck failed on the red wire and the red/white wire.

BECAUSE I put the flywheel on with a seven millimeter socket stuck inside the flywheel and I put the nut on with air impact till the socket smashed one of the stator coils.
I new something was wrong when the starter would not crank the flywheel.
Its just not a good idea to get in a hurry. ANYWAY I took that That mess off and put my old stator back on.The coil readings after the install of the old stator were around 186 dva volts for all six coils.Specs say 150 volts or more.All of the old stator wires check out ok,but they are high.Specs say 150 for blue/white wire and 180 for blue wire or above.I had 251 volts for the blue/white wire and 265 for the blue wire.
I was told that was probaly too high. Thats why I had orignaly replaced the stator.
Took the boat out and run it to 5200 rpms.
I believe the bow just needs to come up a little for the motor to achieve the 5500 to 6000 rpms.
I plan to change the angle of my motor to do this,using a wedge.
When I trim the motor in I used to be able to lift the bow way too high,now it just gets level at full trim.
To me going at 5200,rmps, one should be able to bring the bow up.
I will try this tomorrow and post the results.
All the work I have done on the motor has helped some,well cept for the stator,trying to forget that nightmare.

 

[fisherman81654]

Re: 1985 mariner 175 powerloss on top end

Re: 1985 mariner 175 powerloss on top end

One of the carburators was somewhat pluged,maybe the fuel pump was a little weak and the rectifier was toasted replaced all reed block gaskets,so it was a combination of those things to make me lose speed,I still should have been able to raise the rpms to 6000,after fixing those problems.
Well today ater changing the angle on the motor(to give me more trim),I reached 5800rps and then it droped to 5300 rpms.I watched my trim indicator and it would not raise up to where I new it should go,in other words in the driveway I took note of where the guage was reading when I had the motor at full trim.
The first time I run the boat on the lake today,it let me trim all the way,observed the second time and it would not max out trim.
I have a new trim/tilt motor,MY guess is the pump is finally going out.
But I did catch a striper today!
Now I need to troubleshoot the trim/tilt system,not gonna get in too big off a hurry to do that,Fall striper season is here.Thanks to all to have HELPED!

 

[Texasmark]

Re: 1985 mariner 175 powerloss on top end

Re: 1985 mariner 175 powerloss on top end

I was going to direct you to your trim piston leaking but in re-reading your last comment in your last post, which I didn't get down to when I realized that your problem was trim leakage, not engine related and started this reply (which I have completely erased and wrote this), I see you have realized that.

Good luck

Mark

 

[fisherman81654]

Re: 1985 mariner 175 powerloss on top end

Re: 1985 mariner 175 powerloss on top end

I was going to direct you to your trim piston leaking but in re-reading your last comment in your last post, which I didn't get down to when I realized that your problem was trim leakage, not engine related and started this reply (which I have completely erased and wrote this), I see you have realized that.

Good luck

Mark

Thanks Mark

 

[fisherman81654]

Re: 1985 mariner 175 powerloss on top end

Re: 1985 mariner 175 powerloss on top end

I installed the Oring kit and one seal in the trim/tilt,took the boat out and got a steady 5500RPMS At full trim.I think I should be able to reach 6000 RPMS,but I am not going to worry about that right now.
Thanks for everyones help...