Mercury Outboard starting issue HELP !

Joseignacio

Seaman
Joined
Jul 30, 2009
Messages
57
I have a Carburated 1998 Mercury Off Shore 150 HP. My issue is when I start the motor, the RPMs keep going down until it shuts off. I have to keep pressing the choke in order to keep it running. After about 15 minutes of chocking the motor finally stabilizes. Sometimes longer than 15 min. It this normal ?
 
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