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Mariner 150 Intermittent Problem
Hello. I’ve got a Mariner 150 efi, 95, and have had
an intermittent problem. Sometimes on take off it bogs down and has barely
enough power to plain out. Suddenly it will kick in and go as if a switch
is being cut on and off again. A little history on what I have found and
replaced.....
Found a burned out regulator, replaced both "40amp".
Replaced both switch boxes.
Checked fuel flow from tank to fuel rail, and pressure, and voltage to
pump according to manual. All checked ok to specs.
Preformed resistance test on trigger assy. Found something a little funny
there. All test spec out ok but I can pull on the harness at the flywheel
just slightly, and watch the readings on meter fluctuate sometimes fall
below specs. Not sure if that is ok.
Now this thing runs fine in the tub, but not on the lake!
I’ve also tried using a spark tester an tried a timing light while its
idling and pulled on the trigger harness and cyls keeps a spark.
I’ve checked every possible connection from battery to engine for bad
connections and corrosion nothing there.
I think I’ve narrowed it down to ether the stator, trigger, or spark
advance module. But I’m not really confident in that its one off those
things. Any advice would be GREATLY APP!
Thanks in advance, Keith
Keith,
Sounds like the prop is hooking up too hard and causing the motor to bog.
Add some vent holes and it will probably cure the problem. If you can, run
it on a test wheel (prop) and see if you can verify if the RPM and
acceleration is proper. I would try these things or if you have no access
to these, just try a different and smaller prop and see if the problem
goes away on take-off.
Randy
Please submit
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members. Randy can not be held responsible for any advice
given. Though his information and expertise is second to none, he
has no control over what you do with your boat. It is up to you to
boat safely and act responsibly, and his advice is only to be used as a
guidance for your high performance boat/motor of which you are the one
responsible for the risks involved.
Thanks,
Mark C.
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