96 mariner 115 makeing popping noise

mitar97

Cadet
Joined
Jun 9, 2011
Messages
16
hi guys i have a 1996 mariner 115 2 stroke and when i rev the engine it makes a popping noise

thanks for your help guys:)
 

Jake_MN

Petty Officer 2nd Class
Joined
Jun 1, 2010
Messages
106
Re: 96 mariner 115 makeing popping noise

Define "popping". Something banging together in the engine? A sound from the exhaust, i.e some degree of backfire or ignition miss?
 

mitar97

Cadet
Joined
Jun 9, 2011
Messages
16
Re: 96 mariner 115 makeing popping noise

the popping noise comes from exhaust
 

Jake_MN

Petty Officer 2nd Class
Joined
Jun 1, 2010
Messages
106
Re: 96 mariner 115 makeing popping noise

ok, is the popping noise occurring when you back off the throttle quickly?
 

Jake_MN

Petty Officer 2nd Class
Joined
Jun 1, 2010
Messages
106
Re: 96 mariner 115 makeing popping noise

Most likely a lean condition. richen up the mixture and if the issue persists clean the carbs
 

mitar97

Cadet
Joined
Jun 9, 2011
Messages
16
Re: 96 mariner 115 makeing popping noise

i run the engine 100:1 and the carbs were rebuilt 2 weeks ago
 

1nebel0

Chief Petty Officer
Joined
Nov 28, 2005
Messages
512
Re: 96 mariner 115 makeing popping noise

If you are reving the motor at the carbs you are not advancing the trigger...If you are reving from the throttle arm then that isn't it...Is your base timing correct? You say you are running 100 to one..I would hope you are referring to the oil injection where at idle it is 100:1 and full throttle it becomes 50:1....your motor won't last long if you are premixing at that ratio....I am with Jake in regards to lean conditon... You need to make sure the idle mixture screws are adjusted correctly..at least 1 1/2 turn out for being turned all the way in gently. Only the bottom two carbs will be adjustable....just trying to grab straws here.....
 
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