79' Mariner 70hp bogging down at full throttle

westexasrepublic

Chief Petty Officer
Joined
Jun 17, 2009
Messages
524
1) the most important, is my engine runs good when it wants to.
The problem occurs when I leave the no wake zone. I go to full throttle to get up on plane and it will throttle all the way down but wont get on plane since it feels like its only half throttle.

2)my tac dosnt work so I dont know any RPMs during the first problem. Though I confirmed the wires to the tac are receiving power.









ANY SUGGESTIONS FOR TROUBLE SHOOTING THIS PROBLEM WOULD HELP. ALSO ANY IDEAS WHAT IT MIGHT BE?

MORE INFO TO HELP diagnose. 14' FIBERGLASS STAR BASS BOAT TRI-HULL. WITH A 3 CYL. OUTBOARD USING A NEW 6 GAL AUX TANK WITH NEW FUEL LINE AND FITTINGS. 50:1 GAS. PROP SIZE 10.5X 11 PITCH X 4BLADE (COMPOSITE)
COULDNT SAY EXACT BUT BOAT DOSNT WEIGHT MUCH AT ALL. I ALSO MOVE MY TRIM PIN ACCORDING TO BOAT LOAD CONDITIONS TO GET ON PLANE FASTER I USUALLY RUN IT ALL THE WAY DOWN.
 

westexasrepublic

Chief Petty Officer
Joined
Jun 17, 2009
Messages
524
Re: 79' Mariner 70hp HELP

Re: 79' Mariner 70hp HELP

I was told that this little module was replaced on my dads Mariner 150hp which had a similar problem and now it runs better? what is it and how would it help?
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This is what im pointing at where I also may have found a problem...
6f468d8e4477__1246987695000.jpeg

ZOOMED IN
9ca6b51355d5__1246987622000.jpeg

Im getting water coming out from under cylinders 2 and 3, why would that be? and whats the fix?
 

j_martin

Admiral
Joined
Sep 22, 2006
Messages
7,474
Re: Nevermind This Forum Sucks

Re: Nevermind This Forum Sucks

You aren't really expecting any help with a title like that, are you?
 
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