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  1. Re: 1998 Mercury 115 2+2 misfiring above 2000 RPM

    I am not there but its possible that's the issue. Before buying one take a timing light to all cylinders and see if spark is breaking down when missing. Also test high speed side of stator with meter...
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    9
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    117

    Re: help to identify my mercury

    Change the 9 to a G and it becomes a 25hp...stop running it till you can verify cooling.
  3. Re: 2001 Optimax 225 vibration at 2.5k rpm

    Sounds like its loosing a bank of cylinders.....
  4. Re: 1998 Mercury 115 2+2 misfiring above 2000 RPM

    I have see the bias bad in pack cause this....
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    4
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    71

    Re: 1985 Johnson 70hp 2 stroke no start

    Will spark jump a 1/2 air gap??? Is it bright with a "snap' to it?
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    12
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    190

    Re: 1998 115 ficht no spark

    As Baddog stated without software there are very few tests. Could be RPM,voltage,CPS or EMM problem
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    4
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    126

    Re: Strange powerhead replacement question

    You can break it in in a hour...just like factory does. Back it in water with a homemade test prop, run 5mins at idle,5 mins in gear at idle ,then raise 500 RPM and run for 5 min and advance in 500...
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    18
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    185

    Re: Carb Jets 79 70 johnson

    Parts show you have a #35 as stock.... a 32 is #320016, 31 is #318823 and 30 is # 317473.....
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    18
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    177

    Re: 1990 40hp Mariner weak lower cylinders

    You used neon or open gap spark tester???? The neon will lie to you...
  10. Thread: PRV

    by faztbullet
    Replies
    9
    Views
    163

    Re: PRV

    Flywheel and EMM usually syncs within 3/4 of turn then fuel and spark happens, that's why these motors usually started within 3 revolutions of flywheel. The CPS is looking at all those raised lines...
  11. Re: '73 Mercury 1500 I6 shutting off after aprox 15 mins

    Make sure you clean the inside of that cap GOOD and replace carbon pin
  12. Thread: PRV

    by faztbullet
    Replies
    9
    Views
    163

    Re: PRV

    Its not the coils as all 3 wouldn't fail..test with software. Either the flywheel CPS is not syncing, battery or starter weak(check rpm with software) start assit capacitor weak/bad or EMM has...
  13. Thread: PRV

    by faztbullet
    Replies
    9
    Views
    163

    Re: PRV

    You need the software to test as there is testto operate coils and injectors. Getting any lights when key on????
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    81

    Re: the right pitch prop

    Biggest diameter around 11-12 pitch if hardtop,14-15 if softtop...read below
    https://www.boatingmag.com/boats/pontoon-boat-props-no-mickey-mouse-affair/
  15. Re: '73 Mercury 1500 I6 shutting off after aprox 15 mins

    Rebuild the trigger as those coils rarely fail unless damaged and cracked
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    4
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    109

    Re: High ring pistons and broken rigns

    High ringer...


    https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcQAylDKv94imx7k-nC02mmwFRuYi0PehUjZ_WfJI2a7avCxOnZlHg
  17. Re: 1974 Johnson 115 Misses on cylinder 3 above 4000 when warm

    Watch this and you have idea of what needs to be done...
    https://www.youtube.com/watch?v=w0Dxgw6RwlU
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    12
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    190

    Re: 1998 115 ficht no spark

    Unplug the connectors ,reconnect the kill switch. When you turn switch on do you hear fuel pump run in vapor tank? If not your notting getting power to EMM
  19. Re: Still having problems with my v-175 Mercury 2 stroke

    The stabilizer is that module above carbs...disconnect and chunk it. The tone changing when hitting wave is float levels off. Get a diaphragm kit for a 1986 150hp,clean carbs an check float level...
  20. Re: 1974 Johnson 115 Misses on cylinder 3 above 4000 when warm

    Just because it throws a arc doesnt mean ts in time.
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