'99 merc 15hp, won't start aft running for 5 min???

jack henk

Recruit
Joined
Aug 21, 2014
Messages
1
new owner HELP!!! 15hp '99 Merc (4stroke), aft running on idle 2 times at home, on lake it dies and will not start again??? used very little by previous owner... 1st 3 things to check??? Help Jack! :confused:
 

MH Hawker

Vice Admiral
Joined
Jul 13, 2011
Messages
5,516
Check for spark and fuel, Do the plugs spark and are they wet with fuel.
 

Star

Chief Petty Officer
Joined
Sep 21, 2010
Messages
481
If you open the throttle a up to the start position, and carefully squirt starter fluid into the intake and it fires then all systems are good. Fuel is your issue1 That model has a picky carb and it must be CLEAN!!! They also had problems with the gas tank fuel line liner disintegration and plugging the filter. I would disassemble the complete fuel line to the fuel pump, push something through the hoses to remove any particles. Replace the line from the tank to the motor. Get a new filter. I am 90% sure this is your problem. On principal I would disassemble the carb and soak it in Berrymans chemical cleaner from walmart. Engines that aren't used much get varnish deposits that don't disappear with a simple flush. I would soak it for at least 3 hours and follow the directions.
 
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