Re: 1976 Evinrude 115 seems to be flooding
Most of the water used during normal operation of the motor should leave through the exhaust at the propeller.
The excess oil which is not burned will pass out with the exhaust and will continue to drain from the engine when the motor is not running.
Cold starts require enriched fuel/air mix which is accomplished on your motor with the chokes. The chokes have to be 100% fully absolutely closed and stay closed for a cold start. Anytime you clean the carburetors, you have to reset the choke linkage after replacing the carburetors. So, take the cover off and watch while someone cranks the engine and holds the choke switch so that you can be sure that the chokes are closed. After they are synchronized, move the choke solenoid in small increments until it closes the plates properly.
You still need 300 RPM for your ignition to function well, so be sure that your battery is fully charged and that the cables are in good condition.
As the pistons rise and fall, they create a rhythmic vacuum behind the reeds, which open and close, thus pulling fuel and air mix through the carburetors. Crossflow carburetors deliver a precise mixture of air and gasoline using fixed orifices, sometimes referred to as jets.
When the carburetor throttle plates are closed at idle, the vacuum places greater suction on the carburetor throat behind the throttle plates, pulling fuel through the idle orifices and into the throats of the carburetors through tiny openings in the floor of the throats.
Whenever the carburetors are moved, as when cleaning, or for whatever reason, it is required that they be replaced airtight to prevent upsetting the delicate mixture of air and gasoline, so new gaskets should always be used. Additionally, the carburetors must be synchronized so that they open and close at precisely the same precise time. The throttle plates should be fully closed at idle and perfectly horizontal at WOT (Wide Open Throttle). The importance of these steps can never be overstated because it is impossible for the engine to run smoothly without them, especially at idle speed.
The synchronization of the carburetors requires two steps: first the individual carburetors have to be synchronized with each other; then the carburetor linkage has to be adjusted so that the roller of the cam follower aligns precisely with the embossed mark on the throttle cam while almost touching the cam. Any attempts to adjust these settings other than directly on the carburetors? linkage will usually only make things worse. The throttle cable should be disconnected while making these adjustments.
Once the carburetors are perfectly synchronized and the roller set to the embossed mark on the cam, the throttle cable should be adjusted so that it slips on without causing any movement of the linkage at the engine. To allow for tension, move the throttle arm on the remote control fully forward and back to neutral before adjusting the cable.
