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1974 merc. running rough. 402 model

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08-27-2009, 03:06 AM

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Join Date: Aug 2009

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1974 merc. running rough. 402 model

runs good at idle, then as you increase speed the eng. start to sputter? can you help me.? each cylinder has 125 lbs. of compression.
thanks from ED

Last edited by charles54; 08-27-2009 at 03:08 AM. Reason: more detail

charles54 is offline

08-27-2009, 06:20 AM	#2
A1 Outboard Senior Member Join Date: Feb 2007 Location: Pgh,Pa/Orlando/Atlanta Posts: 2,499	The problem could be the fuel pump. Fuel pump on these engines should have a kit installed when the carb is cleaned. The filter screen should also be cleaned. __________________ *Home Of the Finest Rebuilt outboards* 4STROKE/2STROKE REPOWERS/ REMANUFACTURED/USED Deland Fl/West Sunbury Pa /Atlanta /Portsmouth,Va/Ft Lauderdale call toll free 1 877 9832537

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