200 Mariner EFI cold starting problem

ambitious

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Joined
Aug 28, 2004
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2
Should a 200 Mariner start just by turning key without using the warm up lever on your controls? I bought the engine used so i am not sure if the engine is working properly. The engine had a new powerhead installed before i bought it 2 years ago and i was wondering if maybe something was not set up properly when installed! It runs fine WOT but seems to run rough idling. Some people tell me that Mercury engines normally run rough during idle. I thought a EFI outboard would start like a EFI car! Everytime the engine is started cold the warm up lever or choke lever on the controls has to be all the way up or it won't start! Any input would be appreciated!
 
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