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Conference vicki::boats

Title:	Powerboats
Notice:	Introductions 2 /Classifieds 3 / '97 Ski Season 1267
Moderator:	KWLITY::SUTER

Created:	Thu May 12 1988
Last Modified:	Wed Jun 04 1997
Last Successful Update:	Fri Jun 06 1997
Number of topics:	1275
Total number of notes:	18109

1108.0. "Merc 115hp floods out" by MSBCS::HURLEY () Thu Sep 02 1993 16:08

    I'm putting this question in for a friend who has A mercury 115
    outboard motor. He just got back from vaca up in Maine with his
    boat and had some problems with the motor. Its a 1986 and he said
    the first day the motor ran great, no problems at all. From the 2nd
    day on the motor when first started up ran great with no power 
    problems. ONce the motor had been running for about 1/2 hour that when
    the problems began. Whenever he tried for quick pickup the motor would
    bog down and flood out. He said that if he increased the gas just a
    little at a time the motor would perfrom fine and pick up speed, but
    once he gives it a good quick nudge the motor bogs down and floods out.
    
    	Any thoughts??
    
    Rick, U still doing motors on the side?

T.R	Title	User	Personal Name	Date	Lines
1108.1		SOLVIT::CHACE	My favorite season is getting nearer!	`Fri Sep 03 1993 10:29`	7
	It could be a million things, but I'd check the plugs first. When the plugs are carboned up, they have a weaker spark. Under load (Accelerating is worst) a sparkplug is much more likely not to fire than at any other time. Kenny
1108.2	Also plug wires	SALEM::NORCROSS_W		`Fri Sep 03 1993 10:50`	5
	Another noter recently had a similar problem. Turned out one of the spark plug wires was arcing . They replaced the wires and plugs (if I remember correctly) and the problem went away. Would be most noticeable during acceleration. Wayne
1108.3		MSBCS::HURLEY		`Fri Sep 03 1993 11:29`	3
	I should have mentioned the plugs were changed the first time it happened. Same problem after. I'll suggest the wires to him and maybe its a simple fix?
1108.4		SOLVIT::CHACE	My favorite season is getting nearer!	`Fri Sep 03 1993 12:17`	5
	It could be the wires. It could also be one or more coils. I do vote for spark-related, though. Kenny
1108.5		SALEM::PAPPALARDO		`Fri Sep 03 1993 15:04`	8
	A little trick we used to use on auotmotive wires was to spray them with Windex and start the vehicle up. If the area is dark enough and the wires are bad you'll see them "arc" out right away. Guy
1108.6	Kids, don't try this at home!	SALEM::NORCROSS_W		`Tue Sep 07 1993 08:52`	5
	I personally like to grab each wire while standing in the water to see which one gives me the biggest jolt! Just kidding! Just kidding! Just kidding! Just kidding! Just kidding!
1108.7	Likely not the wires ...	11SRUS::FYFE	United We Stand America - 800 283-6871	`Mon Sep 13 1993 11:33`	8
	If the wires were the cause it would run poorly right from the start and not wait 1/2 hour to start failing. Sounds to me like a fuel flow problem, likely caused by excessive vacuum in the fuel tank built up over time. Doug.