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Old 07 July 2014, 02:59   #21
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Thanks guys, appreciate the replies, offline all yesterday but will read through all the points and come back, did try without choke and then with but if it was flooded it would have cleared in starting with throttle anyway as is normal to clear a flooded engine. I re-started it this way and ran about 10 times fine but just totally refused to run/start on idle regardless. Also went through all usual checks for loose wires/plug leads etc at the time but will check all over again.
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Old 07 July 2014, 06:05   #22
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Sorry to hear of this latest outboard trouble Max. My Mariner 15 wasn't usually run dry and I never used stabiliser and it would also start fine... even on fuel more than 6 months old.

What would be very telling would be to pop it in the tank then try and start as you normally would say with about 10 pulls. Then pull the plugs and see if they are wet with fuel or dry. Not sure that's been mentioned because I've skim read this, sorry if it has.
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Old 07 July 2014, 08:12   #23
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Sorry meant to say "it would always start fine".

Worth adding that my outboard experience of the past has covered mid 80s Mariner 2.5, 4, 8, 20 & 25hp... mid 80s Suzuki 3.5 & 8, 2001 Mariner 15 and of course 2006 Tohatsu 9.8. I'm excluding Seagulls as they are something of an oddity.

Most of these have been owned during the past 8yrs so many already 20-25yrs old.

None of them were normally run dry, fuel was from a variety of brands and stabiliser never used. Yet they would all start within a few pulls, often first pull even after 6mths+ plus over the winter of garage storage.

I know that doesn't help much but it's what I regard as the norm for a 10-30yr old 2-stroke.
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Old 07 July 2014, 11:50   #24
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OK, had another session this afternoon - no change.

Checked all electrics - I really cannot stress how mint and well maintained this engine appears, seriously looks like it was assembled yesterday, electrics connector/bullets/terminals are completely like new, clean and tight.

Plugs less than 10 hrs old, clean and gapped perfectly.

Spark on each on is good and strong.

Kill switch works perfectly as intended.

Looks like I'll have the take the carb off..

I wish one of you outboard guru's lived locally!

I ****ing *hate* the things....

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Old 07 July 2014, 12:55   #25
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Did you pop the plugs out in its no start condition?
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Old 07 July 2014, 13:02   #26
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Still think the idle jet is not happy in the carb.....Giving you a screwed mixture at idle.

That's be my first look if it were mine.... But i could be wrong.. I often am really
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Old 07 July 2014, 13:32   #27
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(David, yes - plugs A1).

OK, carb off - and this little blue fellow that the primer lever acts on was all gummed up and stuck partially down, when I pushed it down it stayed...
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Old 07 July 2014, 13:35   #28
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A common fault on those merc engines I've found.. Woop the four screws out (care not to lose the little spring in there) free it up put it back together and try again. Easy to do without taking carb apart...
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Old 07 July 2014, 13:36   #29
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Max,

Check to see if you have a gummed up carb butterfly axis too, closes when pulling choke out, will not open fully when choke's back in. Clean with carb spray and lube with thin oil.

Happy Boating
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Old 07 July 2014, 14:04   #30
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>>>(David, yes - plugs A1).

Ah well yes.... but wet or dry.. big difference in what you're looking to find.
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