Power Loss

[COACH_J]

HEY GUYS NEW TO THE FORM SO GO EASY ON ME..LOL I HAVE A 93 88 SPECIAL, YESTERDAY WHILE ON THE RIVER IT STARTED ACTING UP, FROM A STOPPED POSITION U COULD PLAIN OFF, BUT AFTER ABOUT 1/2 TO 3/4 MILE IT WOULD LOSE POWER, I COULD THROTTLE BACK TO NETURAL WAIT FOR A MINUTE OR 2 AND HIT IT AGAIN SAME THING 1/2 TO 3/4 MILE IT WOULD DIE AGAIN, SO I CAME HOME REBUILT MY CARBS NEW PLUGS, NEW GAS, BACK TO THE RIVER AND ITS STILL DOING THE SAME THING, IDELS PERFECT, ANY HELP WOULD BE GRATEFUL

THANKS

 

[jtexas]

Re: Power Loss

Is the tank vent open?

Try pumping the primer bulb when it looses power, if that makes it run right, then rebuild the fuel pump.

 

[COACH_J]

Re: Power Loss

THE TANK IS A BUILT IN VERSION 18GALLON, IT HAS OPEN VENT LINES RUNNING FROM THE TANK TO SPLASH WELL, AND I DID PUMP THE BULB WHILE UNDERWAY, AND IT MADE NO DIFFERENCE, NO ALARMS OR GOING OFF WATER PUMP IS NEW, JUST HAD EVERY THING SERVICED

THANKS

 

[COACH_J]

Re: Power Loss

Hey Guys, Went To The Local Repair Shop With This Issue And The Answer I Got Frm One Of Their Tech's Was It Sounded Like The Rectifire Was Going Out, He Stated It Has A Low And A High Side, And That The High Was Going Out, Now Then. Im No Boat Mach. By Far But That Sounded A Litttle Far Fetched To Me, From What I Have Read In All The Post I Could Come Across, The Power Pac My Be The Culprit..am I Heading Down The Right Road, I Sure Hate To Carry It To The Shop And Let Them Try And Run It Down....any Help Would Be Grateful

 

[jtexas]

Re: Power Loss

I never heard anybody use the terms "high side" and "low side" talkin bout a rectifier, but I guess he could be refering to the AC generated by the stator.

Rectifier goes bad, two things happen: 1> motor stops charging the battery and 2> the tachometer stops working (tach isn't harmed, it just isn't getting a signal). It's also possible that a blown rectifier can interfere with the ignition. One thing you can do is run it with the the yellow rectifier wires disconnected. If the problem persists, you'll have ruled out that theory.

Wouldn't of been the first thing I thought of, but then I'm not getting paid for that.

First, I'd do the compression and spark tests described here:
http://forums.iboats.com/showthread.php?t=313963 and here: http://forums.iboats.com/showthread.php?t=188767

Let us know what you get.

Check the fuel tank for water/debris. Was ethanol-blended gas introduced into your area recently? That stuff will clean the gunk out of a gas tank and deliver it to the engine.

 

[COACH_J]

Re: Power Loss

Ok Guys, Their Is No Signal, To The Tac, Sooo Checked The Harness Back To The Harness Box Looking For Bad Wires None To Be Found, Who Knows The Rectafirer May Be Bad,,,, But If I Understand Its Job, Its Only Their For A Tac Signal And To Chagre Battires, Am I Correct On This, How Could This Inter-fear With The Ignition System. Other Than Its Murpyys Law And It Belong To Me..hhmmm
Anyway, Gonna Replace With A New Tac Other One Looks Like Its About Shot Anyway....also I Wanna Install A Trim Gauge, Am I Opening A Can Of Works Here, Is Their A Link Or Diagrahm I Could View...thanks For Ur Time........

 

[cenrique]

Re: Power Loss

Ok Guys, Their Is No Signal, To The Tac, Sooo Checked The Harness Back To The Harness Box Looking For Bad Wires None To Be Found, Who Knows The Rectafirer May Be Bad,,,, But If I Understand Its Job, Its Only Their For A Tac Signal And To Chagre Battires, Am I Correct On This, How Could This Inter-fear With The Ignition System. Other Than Its Murpyys Law And It Belong To Me..hhmmm
Anyway, Gonna Replace With A New Tac Other One Looks Like Its About Shot Anyway....also I Wanna Install A Trim Gauge, Am I Opening A Can Of Works Here, Is Their A Link Or Diagrahm I Could View...thanks For Ur Time........

I am having the same problem with my 75 hp johson 1983, i am going to take it to the mech this week, i will let you know if he also thinks is the rectifire

 

[jonesg]

Re: Power Loss

I don't think its the rectifier, you can run them with one, it'll probably toast the stator but it'll run.

Sounds like its starving for fuel, try spraying some fuel from a spritz into the carbs when it bogs....or bumping the choke.(easier).

If so, I'd say rebuild carbs and test again, then look towrds fuel pump if it still bogs.