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Post by bosssounds on Apr 12, 2008 18:15:12 GMT
Hi all iv been refitting a boat i purchased and now its time to start on the engine its a 2 stroke outboard mariner 25hp its been laid up for about a year (worked fine until lay up)and im having trouble starting it iv got new plugs but still no good has any one got any any tips for getting it started?
Thanks.
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Post by michael1923 on Apr 12, 2008 18:44:13 GMT
Where abouts are you from.
Start with basics. 1st make sure you have a spark then make sure you have fuel, check the plugs are getting wet.
If you have both of these it's a bit more complicated but i bet one of them is missing.
Mike
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Post by bosssounds on Apr 12, 2008 18:48:51 GMT
im from sandown ,thanks for that il have a look.
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Post by michael1923 on Apr 12, 2008 19:07:00 GMT
No probs, i would check for a spark though. I know you've changed the plugs but could be something else.
i also had a but of muck blocking a fuel line once.
there are enough members on the island, one might help
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Post by BrianR on Apr 12, 2008 20:02:30 GMT
If you've got a spark.
Was fuel left in the carb, when it was layed up?
If yes remove and clean the float chamber.
Are you using fuel that's been in the tank for a year?
If yes get fresh fuel.
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Post by peterpan3494 on Apr 13, 2008 6:38:42 GMT
If you've got a spark. Was fuel left in the carb, when it was layed up? If yes remove and clean the float chamber. Are you using fuel that's been in the tank for a year? If yes get fresh fuel. have heard that the fuel can go off if left long enough not sure if thats true or not |
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af-k
New Member
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Post by af-k on Apr 13, 2008 8:12:19 GMT
Fuel definately loses its ability to burn...........make no mistake.
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bazza
New Member
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Post by bazza on Apr 13, 2008 8:17:39 GMT
i had the same trouble with my old 2 stroke motorbikes, what that used to be was the jets in the carb, they used to get gunged up if they wern't run for some time, i use to strip the carbs clean the jets out with carb cleaner and then blow them though with compressed air paying particular attention to the pilot jet.
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blank
Second mate
Posts: 148
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Post by blank on Apr 13, 2008 9:02:34 GMT
fuel starts to "go off" after 6 weeks or so.
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Post by Lord Lucan on Apr 13, 2008 9:35:30 GMT
Fuel and plugs are the 2 most likely culprits. We used to suffer with this on the motorbikes. I know fuel goes off after a little while but am not sure exactly how long. I've just bought a new lawnmower and it recommends not buying more fuel than that which you are going to use within 30 days so that gives you and indication. I've also learnt not to mix new fuel with stale. It's like adding fresh milk to milk thats turned...result...the whole lot's no good. If you do strip the carbs and clean the bowls/floats/jets etc, take care around the little paddle/vane that the float presses against. This thing sets the height that the fuel resides at in the main jet and if you bend it you'll affect the running.
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Post by bosssounds on Apr 14, 2008 17:54:50 GMT
Thanks for all your help il have a go at the weekend with sum new fuel as the stuff iv gots about 3 months old so that could probaly be the culprit.
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Post by monkeynuts on Apr 14, 2008 19:47:43 GMT
as said above , clean out carbs(esp the jets) and check for a spark. id also give it a good dose of WD40 over the electrics. if that fails you might have to go bit deeper.
cheers john
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Post by Dave.S on Apr 14, 2008 23:37:32 GMT
Just a thought It is not unusual for jets to get coated in lacquer and deposits over time, this reduces the amount of fuel it can pass through the jet. I recently had this problem on an old seagull engine that would only run if I had the choke on AND hold my hand over the air intake. A quick strip down of the carb, clean out the jet with a small piece of fuse wire and rebuild. Started up as normal second pull and ran a treat. Hope it helps Dave  |
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