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Old 27 December 2015, 17:49   #1
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75hp 2 stroke No spark (HELP!)

Hi all,

Engine is a Mariner 75hp 3cyl 2-stroke (Clamshell).
After fixing the problem of the flywheel not spinning and rebuilding th estarter motor I have found that I have no spark in either of the 3 cylinders, any suggestions as of what to do here? I have made sure the leads are good and that the contacts are clean before it got too dark to see.

Any advice would be of great help
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Old 27 December 2015, 18:26   #2
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Have you checked the kill circuit is not shorting?
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Old 28 December 2015, 03:25   #3
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make sure all the earths are clean and tight, then its out with the volt meter staring at the stator check voltages, some one on here will have the figures good luck.
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Old 29 December 2015, 06:20   #4
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Thanks, will check the KC circuit in a minute, also which part is the stator?
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Old 29 December 2015, 09:51   #5
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Quote:
Originally Posted by jack.watts View Post
Thanks, will check the KC circuit in a minute, also which part is the stator?
Have a look on the net for a switch box test, which you can do with a multimeter. Have you made sure the switch box is correctly coupled. I have a Merc 60 3 cyl , which is probably not dissimilar and I have the oem Merc manual. I could have a look for the test specs in my manual. Dave j
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Old 29 December 2015, 10:55   #6
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do you have a positive feed from the ign barrel/key to the coils?
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Old 29 December 2015, 16:43   #7
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Old 10 January 2016, 01:15   #8
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No Spark (All Cylinders). Trigger (under flywheel), Switch Box, Switch Box wiring if removed since last running. If single coil for all three, it's a possibility too. Good Luck.
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Old 10 January 2016, 12:11   #9
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is it a red stator or a black one under the flywheel?
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Old 10 January 2016, 18:22   #10
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I'm not sure, I think it's black but will have to check
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