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Old 03 June 2013, 11:53   #1
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outboard probs

hi guys....newbie probs...finally got out our on 2.5 m sib and 4hp yamaha 2 stroke engine the weekend.... first time out sibbing...had great fun until we ran out of petrol (rookie mistake, will learn from it).... when i topped up with petrol i couldnt get the engine to start again.... got home and tried it to flush out the salt water and it started for like 10 secs and stopped... tried it a few times and its kicking in for about 5-10 secs but keeps stopping.... anyone got any idea on this before i bring it to my local boat shop... did we damage the engine by running out or am i just doin something very stupid....
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Old 03 June 2013, 14:02   #2
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Is it a new or used 2 strokes engine ? Was 2 strokes oil added to fuel when refilling again ? Engine runs on a interior or exterior fuel tank ? If interior, fuel is fed by gravity, takes some 10 seconds to flow from tank to carb bowl. Will need to choque carb again for an easy re start.

If it's a used engine, probably contaminated fuel on tank has clogged the small fuel filter located inside fuel cock if happens to have one. Check having good fuel flow from tank to carb.

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Old 03 June 2013, 14:10   #3
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its a 2nd hand engine with an interior fuel tank.... ran perfectly for about hr and half until we ran out... when i refilled it wouldnt start again... just tried it again and it kicked in for about 20 secs then just slowly stopped....
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Old 03 June 2013, 14:13   #4
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I think what Loco is asking is did you put two stroke oil in the petrol?

When you ran dry, you may have sucked dirt into the carbs. Tell us what engine it is. Did you remember to open the vent on the tank cap the second time?
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Old 03 June 2013, 14:19   #5
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yea i used 2 stroke oil with a 50:1 mix... started the same way... open the airvent, turn on fuel, open choke, put throttle to start position and pull chord...its a 1995 4hp yamaha 2 stroke model 6E 0-10...
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Old 03 June 2013, 14:30   #6
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Usually pretty reliable motor. Have you tried it with no choke ? Pull the sparkplug out & have a look to see if it's wet.
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Old 03 June 2013, 14:30   #7
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Quote:
Originally Posted by kookiebrew View Post
yea i used 2 stroke oil with a 50:1 mix... started the same way... open the airvent, turn on fuel, open choke, put throttle to start position and pull chord...its a 1995 4hp yamaha 2 stroke model 6E 0-10...
Really shouldnt need choke if it had just been running, did you try with out ? They were also 100:1 at that age, using double that wont damage it but it will smoke a lot.

Fuel filter is easy and cheap to change, might be clogged up as suggested above.
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Old 03 June 2013, 14:31   #8
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Do you prime it? Our two strokes are a pain if they're not properly primed first — a few seconds running and they gradually dwindle to a halt (unless caught with a dab of choke).
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Old 03 June 2013, 14:48   #9
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tried it without the choke and wont start at all... not sure how to prime it... first engine and total novice... checked the spark plug and is dry...the guy i bought it off said he had just given it a full service (they prob all say that but he seemed genuine enough).... as i said it worked fine until i ran out of fuel...was hoping it was something small before i bring it to someone...
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Old 03 June 2013, 14:48   #10
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I think I would check the carb!!

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