 | Home > Off Topic > Mariner 9.9 fuel issue |
 
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| Siwynne Member Since: 04 Nov 2016 Location: West lancs Posts: 578  
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Rubber parts in carb damaged by increasing ethanol levels in petrol. My mate has to replace nearly every season on his ski boat.
Pump diaphragms mainly from talking to him. |
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23rd Aug 2019 9:55pm |
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| lohr500 Member Since: 14 Sep 2014 Location: Skipton Posts: 1316  
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I'm guessing its a 4 stroke based on the age.
Hopefully just the rubber carb parts as Siwynne says. Can you see where the fuel is leaking out? If fuel is just flooding into the engine then it should either get pushed out through the exhaust system, or a small amount could leak past the piston rings into the sump. If it is pouring out of the lower engine casing, then something doesn't sound right. The lower engine casing should be sealed apart from a crankcase breather that I would expect vents into the inlet manifold on a newer engine. If you check the oil level, is it over full and with a strong petrol smell? If so, once you solve the carb issues, definitely replace the oil. Or is it just pouring out of a breather on the carb and running down the outside of the engine, between the engine and the outer outboard casing? Hopefully the latter, in which case a carb overhaul with new seals and a check on the float should sort it 
I had a 5hp Mariner 4 stroke a few years ago that wouldn't run after a long winter layup. It was due to fuel in the carb that had degraded and blocked the jets. After that, I always disconnected the fuel line from the engine and ran the engine until it ran out of fuel. |
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24th Aug 2019 7:59am |
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| Huttopia Member Since: 23 Feb 2016 Location: West Midlands Posts: 1972
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It’s 4 stroke. I ran the engine dry before storage. Hopefully ‘just’ a carb job, but finding someone to do it on a bank holiday weekend in Salcombe could be a headache!
Thanks for the input both 👍 |
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24th Aug 2019 8:02am |
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| lohr500 Member Since: 14 Sep 2014 Location: Skipton Posts: 1316
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If you haven't done so already, it might be worth trying the trick of gently tapping the carb fuel bowl with a hammer. It could be the float that has got stuck down. Might get you up and running for the weekend.
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24th Aug 2019 8:08am |
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| Huttopia Member Since: 23 Feb 2016 Location: West Midlands Posts: 1972
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Thanks, good shout, had a tap on the bowl and still no joy. Happily Yeowards are looking at it later this morning or first thing Monday (yes they are working on Monday!). Hopefully it can be sorted with minimal fuss 🤞
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24th Aug 2019 9:06am |
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| Huttopia Member Since: 23 Feb 2016 Location: West Midlands Posts: 1972
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Just looked at the stripped carb and the needle had a little bit of corrosion on it which was stopping it moving. Hopefully it can be cleaned up and put back, ideally it wants a new needle but I can’t get hold of one today. Fingers crossed!
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24th Aug 2019 11:21am |
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| lohr500 Member Since: 14 Sep 2014 Location: Skipton Posts: 1316
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I'd give it a gentle clean with something like a non scouring pan scrub, so as not to score the needle. Then move it manually in the jet to make sure it is free and not sticking.
Hopefully it will spring back into life. |
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25th Aug 2019 7:58am |
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| Huttopia Member Since: 23 Feb 2016 Location: West Midlands Posts: 1972
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It did thanks, and it has started and run fine since. My 12 year old has mastered the cold and warm starts so he’s happy as you like. If I can just get him to wash it all down.....
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25th Aug 2019 11:32am |
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| lohr500 Member Since: 14 Sep 2014 Location: Skipton Posts: 1316
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Great news.
At the risk of preaching to the converted, do make sure he always wears the kill cord. |
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25th Aug 2019 12:56pm |
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| Huttopia Member Since: 23 Feb 2016 Location: West Midlands Posts: 1972
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Yep he does/ we all do 👍. He made a hash of bringing it in to a finger berth yesterday and then decided to spend half an hour practicing getting it right. Definitely got it now!
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25th Aug 2019 1:03pm |
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| lohr500 Member Since: 14 Sep 2014 Location: Skipton Posts: 1316
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Great to get youngsters into boating and away from their electronic games.
My 16 year old son did his level 2 powerboat training last weekend and passed with flying colours. But as with the driving test, it's time behind the wheel that builds real experience. Practicing manouvers in a tight space is a great way to learn boat handling, particularly if there are winds or tides moving the boat around. |
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25th Aug 2019 1:11pm |
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| Huttopia Member Since: 23 Feb 2016 Location: West Midlands Posts: 1972
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I’m thinking of making this a permanent fixture just in case 😂
 Click image to enlarge |
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31st Aug 2019 3:25pm |
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| lohr500 Member Since: 14 Sep 2014 Location: Skipton Posts: 1316
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Like it. I bet that won't be possible with the new Defender!!
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31st Aug 2019 3:31pm |
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| Huttopia Member Since: 23 Feb 2016 Location: West Midlands Posts: 1972
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Who knows! I’m just running it dry!
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31st Aug 2019 3:36pm |
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