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Old 31 August 2013, 06:51   #21
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Mine had a bit of corrosion and dirt on the coil and the coil may have been making contact with the magnets so check that and while its off spray some corrosion guard in there for good measure
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Old 31 August 2013, 07:53   #22
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OK, starter off but not sure how to lock engine and remove flywheel.

Having said that though I can clearly see from underneath and rotate to see all the magnets and coil - they really are brand new and you could eat dinner off the inner engine - all the parts are mint throughout...
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Old 31 August 2013, 08:17   #23
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Is this the first time you've used this engine at prolonged low speeds ?

I had exactly the same issue many years ago with an 18hp Evinrude. Cruise / WOT it ran great. Slow river use and it would continually cut out !

Continually had to remove plugs and clean them. It was purely down to oil / petrol ratio with the plugs fouling after prolonged slow running.

Next time it happens it would be worth removing plugs immediately to see how bad, if any, the fouling is.
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Old 31 August 2013, 09:23   #24
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Hmmm I would take it to a mechanic gets to the point where you have done all you can and wasted hours on it. Find someone decent and I'm sure they will sort it in a couple of hours and you get to enjoy the end of the season
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Old 31 August 2013, 09:46   #25
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Thanks Mart, TBH not sure what a reed valve is or looks like?? Can you help a bit more?

."
It's usually just at the back of where the carb bolts to the engine block ,
It's basically a one way valve for the fuel/air mix to go through after its been through the carb ,

Just a hole that's got a number of really thin spring metal flaps that open & close
It's supposed to stop fuel / air mix blowing back back into the carb
Sometimes one or 2 can stick shut , get gummed up or even get bent in the open position or even break off ,

usually quite easy to take apart & clean as long as your not rough with them .
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Old 31 August 2013, 12:28   #26
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Originally Posted by landlord View Post
Is this the first time you've used this engine at prolonged low speeds ?

I had exactly the same issue many years ago with an 18hp Evinrude. Cruise / WOT it ran great. Slow river use and it would continually cut out !

Continually had to remove plugs and clean them. It was purely down to oil / petrol ratio with the plugs fouling after prolonged slow running.

Next time it happens it would be worth removing plugs immediately to see how bad, if any, the fouling is.
No, done trolling before and plugs got slightly oiled but I changed them anyway - we had a blast after and it was fine at WOT etc - just low speed erratic idling.

Mart - pretty sure I don't have a valve like that on here.
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Old 31 August 2013, 13:37   #27
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try sraying seafoam through it or mercury power tune, just do what it say's on the can it may just be a bit of carbon build up
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Old 01 September 2013, 15:03   #28
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If engine is working ok at medium to full wot rpm. If it's just a slow speed erratic idle issue, assuming carb's slow circuit passage is in inmaculate clean condiion, just need to adjust fuel/air and idle screw properly to factory specs.

Happy Boating
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Old 01 September 2013, 15:15   #29
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Tried it again today Loco, it's misfiring like mad and not at all happy at any speed now. I'm really going to have to call in a pro on this one.
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Old 03 September 2013, 14:09   #30
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I feel your pain man
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