See full version: How to Adjust the Carburetor on a 1986 40HP Yamaha Outboard Motor
Allow a minimum "slack" of 1/16 inch and a maximum slack of 1/8 inch in the cable to keep the cable from binding. Test this by rocking the throttle cam from side to side, and measure the amount of throttle cam travel at the rod link ball with a machinist's ruler. Tighten the cable jam nuts and, with the the cam follower resting on the throttle cam -- it's the only thing that will -- tighten the cam follower screw that you previously loosened. here
At the beginning of boating season, listen to your motor for the subtle coughs and sudden hesitations that say something isn't well with the carburetor, the hub of the fuel system where fuel and air meet and mix then flow to the motor's combustion chambers, where, with the spark the ignition system provides, they power the motor. When the carburetor of your 1986 40-horsepower Yamaha outboard is properly adjusted, that power is smooth. Make the adjustments with the motor running and in gear: it's the perfect excuse to go boating. more
Check all of the motor's electrical connections, including the battery, to make sure they're clean and tight. With the engine off and the gear shift in "Neutral," loosen the cam follower screw at the top of the throttle cam with a screwdriver. Back off the idle speed screw until the throttle plate, in the throat of the carburetor, closes.
Launch the boat and move to a study dock. Tie the boat off securely and shut the motor down. Remove the top cover from the motor. more
Loosen the throttle cable jam nuts -- there are two -- located right below the throttle cam assembly, using a small adjustable wrench. With the throttle control at the idle position, move the cam follower roller against the throttle cam. Adjust the throttle cable sleeves in the mounting bracket so you center the roller on raised mark that's located on the throttle cam.
I have a 2006, 4-stroke, Yamaha, 40-hp outboard, model F40TLR
It has three carbs and needs balancing. badly.
I've never done this before, and could use some pointers.
I was thinking of purchasing Morgan's CarbTune Pro.
Any help/advice/diagrams/etc would be greatly appreciated
The linkage rod connecting the three carbs together is not adjustable. The screws that adjust the carb's butterfly have not been tampered with, and all seem to open/close at the exact same time. (The adjustment screws are also marked from the factory in their original position) [links]
LIT-18616-01-73 Service Repair Manual Application: 1997 97' Yamaha Marine Outboard 75HP (75HP) 2-Stroke. Item Model Names: E75V, E-75-V, E75-V, E-75V 75AM, 75AEM, 75AE, 75AET, 85AEM, 85AE, 85AET, E75B, E60J, E75MH. Covers USA, Canada and wold wide models. more
LIT-18616-02-76 Service Repair Manual Application: 2004-2006 Yamaha Marine Outboard F200C, LF200C, F225C, LF225C 200HP (200-HP) & 225HP (225-HP) V6 4-Stroke Engines.
LIT-18616-02-73 Service Repair Manual Application: 2004-2005-2006 Yamaha Marine Outboard 150 HP (150HP) 150C & V150C 2-Stroke Engines. Model Name: 150FETO, 150GETO.
LIT-18616-02-61 Service Repair Manual Application: 2004-2006 Yamaha Marine Outboard 25HP (25-HP) 4-Stroke Engines F25C, T25C (F-25C F25-C T25-C T-25C) F25MH, F25EH, F25ER, F25TR, T25TR. [links]
Re: Yamaha 40 HP carb settings more
Re: Yamaha 40 HP carb settings
2002 yamaha 4 stroke, 3 cyl, 3 carbs, cleaned carbs engine starts and runs well at idle, will not go over 2000 rpm, stalls at about 2000. everything looks ok inside carbs, plugs are new. Looking for suggestions. Tried boring out low speed jets little bit and that seemed to help starting and low speed, then tried boring out main jets and that was a mistake. waiting for new, stock jets. Fuel has some ethanol mix, owner has added something supposed to compensate for the ethanol.
Re: Yamaha 40 HP carb settings [links]
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