2004 15 merc 2 stroke and 2000 yamaha 9.9 problems..need help!

Discussion in 'Outboard Maintenance' started by Flyline, Sep 13, 2010.

  1. Sep 13, 2010 #1
    Flyline

    Flyline Won "Do More With Less" Award!

    1,715
    1
    891
    first of all I took my merc 15hp 2 stroke and ran it all day long no plm at all. always cranks right up and runs so smooth. few hours later i tried to crank it up and it doesnt start after 100 pulls. checked the spark plugs, neutral switch has been by passed, kill switch is attached, full gas with open vent. still wont start at all no firing. whats the problem?

    then went home to pick up another motor a 2000 yamaha 9.9 2 stroke tiller and went back to the lake. cranks right up and idles great. the motor ran wide open no plm at all for 45 minutes. fished for few hours and then crank the motor up, starts right up and runs wide open throttle for 30 minutes all of sudden, the motor began to bog down and quit. wont START at all! checked everything and wont start.

    what is the problem with these 2 motors? :mad:
     
    Flyline, Sep 13, 2010
    Flyline, Sep 13, 2010
  3. Sep 13, 2010 #2
    Brett

    Brett > PRO STAFF <

    7,316
    29
    1,903
    If you used the same fuel tank,
    I'd be looking there for trouble.
    Water in the fuel, dirt, clogged pickup...
     
    Brett, Sep 13, 2010
    Brett, Sep 13, 2010

  5. Sep 13, 2010 #3
    Flyline

    Flyline Won &quot;Do More With Less&quot; Award!

    1,715
    1
    891
    I use 2 different tanks with fresh fuel. Ethanol free fuel tanks and hoses....still can't figure it out.

    The merc might have a stator went out but how to verify this?

    Yamaha motor.....still have no idea why it went down and quit after 30 mintues wide open. Won't start at all.
     
    Flyline, Sep 13, 2010
    Flyline, Sep 13, 2010
  6. Sep 13, 2010 #4
    Brett

    Brett > PRO STAFF <

    7,316
    29
    1,903
    To check the stator you'll need a volt/ohm meter.
    Measure the resistance and compare to the specs in the manual.
     
    Brett, Sep 13, 2010
    Brett, Sep 13, 2010
  7. Sep 13, 2010 #5
    Swamp

    Swamp I Love microskiff.com!

    723
    0
    391
    If you squirt a little gas into the carb do you get any signs of life? If I understand correctly you used two different gas tanks with two different fuel hose assemblies?

    Swamp
     
    Swamp, Sep 13, 2010
    Swamp, Sep 13, 2010
Loading...
Similar Threads Forum Date
Adding factory power trim to a 2004 Mercury 25HP 2-stroke? Outboard Maintenance Apr 27, 2017
SOLD/EXPIRED Mercury 2004 2-stroke 25 Sold/Expired Classifieds Mar 7, 2016
SOLD/EXPIRED FS: 2004 Mercury 25 Sold/Expired Classifieds Jan 11, 2016
Mercury 9.9 sacrificial anode 2004 General Discussion Aug 6, 2014
2004 merc 25hp value General Discussion Dec 9, 2013