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ive got a suzuki dt 50 outboard wich is very stubborn to start theres spark at plugs try to fire but will not start running any suggestions about starting from cold just in case im doing it wrong do you use choke no throttle or throttle no choke any hints would be grateful. p.s forgot to say its electric start
 

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Carb two strokes can be finicky to say the least but I'd try warm up lever fully open or nearly fully open and choke for starting but releasing the choke almost immediately. A bit of experimenting will soon establish the best throttle setting for starting. But also check that everything is ok with the engine - just because you're getting a spark doesn't mean that everything is in order.
 
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Our last boat had a dt55 on the blunt end....a 3 cylinder,3carb 2 stroke so I am guessing very similar to yours?
To start it,we would open the vent on the tank,pump the primer bulb until hard,lift the starting throttle control fully up,push the key fully into the barrel to engage the choke(you can hear the solonoid "clunk" the choke on) then turn the key.
As soon as she fired we would release the choke and just throttle back a bit till she was warmed up enough to run at tickover.
As Clinker said,carbed 2 strokes have a mind of thier own and everyone will have a preferred method of starting thiers.
 
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