Motor running only at about half throttle...

WTL · 10-05-06, 08:48 PM

Hey guys, I took the tracker out today and the motor wouldn't get much past half throttle. It was fine prior to getting to about half throttle, but there was just a point in there where if you gave it any more it would start running incredibly rough and unacceptable. So I drove basically just above planing speed today, and even then it felt like there would be split seconds where the fuel almost cut off. So what does this mean? I have a few ideas of what it could be, but yall know a lot more. I'm thinking the fuel pump could be bad or there could be a clog somewhere in the line, but where in that case would the trouble spots be? BTW, prior today I had a similar problem, but it only happened when I was just shy of full throttle, thus acceptable...so something has apparently gotten worse.

BTW, I ran seafoam through the carb about 3 weeks ago and this has only been the 2nd time she has been out since then.

Christopherkeene9 · 10-05-06, 09:00 PM

How many carbs do you have and how long has it been since you changed your fuel line?

zooker · 10-05-06, 10:23 PM

did you change your spark plugs after the sea foam use?? if not THIS is your problem..

newer moters check your oil injection ports.. they may be clogged..
older moters power head/coil problems..

zooker

WTL · 10-05-06, 10:43 PM

Just bought it so I've never done anything to the motor, fuel lines, ect.

Zook, I checked the plugs right after I put seafoam in it and they looked ok, but have since run the motor a lot more. Can fouled plugs cause the problem I'm describing?

Christopherkeene9 · 10-05-06, 11:18 PM

we had old pieces of the cracked fuel line in our bottom carb when we had simialar problem.

lizardsrule · 10-07-06, 06:35 PM

Quote:

Originally Posted by WTL

Can fouled plugs cause the problem I'm describing?

Yes, at least it did on my boat

Lizards

1FASTLASER · 10-14-06, 05:45 AM

AHHH my ole friend zooker be wise yes he is. Very good point zook. REPLACE the plugs first. A gotta do after running seafoam for the first time. If the problem persists it is prolly the high speed jets clogged. A good ole cleaning out will cure it. While the carbs are being cleaned out examine the entire fuel line and fittings and the tank vent. Make sure all is up to par. What you are experiencing is a lean fuel at speeds. NOT GOOD especially with big engines. I feel confident that fesh plugs and a good carb cleaning and inspection of the fuel system will have ya smiling on plane again.

Wee Vee Bassin · 10-31-06, 09:01 PM

Check the primer ball. That is another common problem.

10-05-06, 08:48 PM	#1
WTL BassFishin.Com Premier Elite Join Date: Dec 2001 Location: Huntsville, Al Posts: 7,466	Motor running only at about half throttle... Hey guys, I took the tracker out today and the motor wouldn't get much past half throttle. It was fine prior to getting to about half throttle, but there was just a point in there where if you gave it any more it would start running incredibly rough and unacceptable. So I drove basically just above planing speed today, and even then it felt like there would be split seconds where the fuel almost cut off. So what does this mean? I have a few ideas of what it could be, but yall know a lot more. I'm thinking the fuel pump could be bad or there could be a clog somewhere in the line, but where in that case would the trouble spots be? BTW, prior today I had a similar problem, but it only happened when I was just shy of full throttle, thus acceptable...so something has apparently gotten worse. BTW, I ran seafoam through the carb about 3 weeks ago and this has only been the 2nd time she has been out since then. __________________ Selling live waterdogs for less since 2005. Last edited by WTL; 10-05-06 at 08:54 PM.

10-05-06, 10:23 PM	#3
zooker BassFishin.Com Premier Elite Join Date: Jan 2004 Location: denton nc Posts: 13,441	did you change your spark plugs after the sea foam use?? if not THIS is your problem.. newer moters check your oil injection ports.. they may be clogged.. older moters power head/coil problems.. zooker __________________ the godfather.. aml in remission since 7-20-09

10-05-06, 10:43 PM	#4
WTL BassFishin.Com Premier Elite Join Date: Dec 2001 Location: Huntsville, Al Posts: 7,466	Just bought it so I've never done anything to the motor, fuel lines, ect. Zook, I checked the plugs right after I put seafoam in it and they looked ok, but have since run the motor a lot more. Can fouled plugs cause the problem I'm describing? __________________ Selling live waterdogs for less since 2005.

10-14-06, 05:45 AM	#7
1FASTLASER BassFishin.Com Super Veteran Join Date: Aug 2005 Location: crossett,arkansas Posts: 2,777	AHHH my ole friend zooker be wise yes he is. Very good point zook. REPLACE the plugs first. A gotta do after running seafoam for the first time. If the problem persists it is prolly the high speed jets clogged. A good ole cleaning out will cure it. While the carbs are being cleaned out examine the entire fuel line and fittings and the tank vent. Make sure all is up to par. What you are experiencing is a lean fuel at speeds. NOT GOOD especially with big engines. I feel confident that fesh plugs and a good carb cleaning and inspection of the fuel system will have ya smiling on plane again. __________________ Laser's rule with Merc's doing the pushing..........KEEP THE WETSIDE DOWN AND THE DRY SIDE UP!!!!!!

10-05-06, 09:00 PM	#2
Christopherkeene9 BassFishin.Com Super Veteran Join Date: Nov 2005 Location: Oviedo, Fla Posts: 2,270	How many carbs do you have and how long has it been since you changed your fuel line?

10-05-06, 11:18 PM	#5
Christopherkeene9 BassFishin.Com Super Veteran Join Date: Nov 2005 Location: Oviedo, Fla Posts: 2,270	we had old pieces of the cracked fuel line in our bottom carb when we had simialar problem.

10-31-06, 09:01 PM	#8
Wee Vee Bassin BassFishin.Com Member Join Date: Oct 2006 Location: Wellsville, PA Posts: 27	Check the primer ball. That is another common problem.

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