Although they have been out a while, a 9.9 EFI model does not readily compute.
How low in HP will they go?
The amount of gasoline injected at idle must be in the nanograms.
I have seen vibration reducing pads that go between the motor's clamp bracket and the transom.
Switching to a propeller with less pitch can help to slow down the minimum idle trolling speed. As can tilting the motor up somewhat to vector the thrust to a less efficient position.
Piston engines...
With the relay power wires disconnected from the relay connect those wires directly to the battery.
Does the trim pump motor now work or not?
Blue to positive and green to ground the motor will trim up. Green to positive and blue to negative the motor will trim down.
Might be a brief spark...
Yamaha T60 EFI models use a engine control unit (ECU) assembly. No CDI assy.
Stator is not in the loop with respect to ignition. The pulser coil tells the ECU when to terminate the ground to the ignition coil to cause it to discharge electrical power into the spark plug.
Is the ECU receiving...
Not sure I am following you.
If turning the screw outward provides more fuel while turning the screw inward provides less fuel, that equates to it being a fuel/air mixture screw. It varies the fuel/air mixture. But yes, the adjustment is made to achieve best idle characteristics. Fuel/air idle...
No different than anything else that a motor maker specifies.
Ok to use non OEM products "IF" they meet specifications.
"IF" the Relion battery continues to meet Mercury's specifications then it "should" be OK.
Negative.
Mercury Marine approves the use of any lithium battery that meets the specifications set for in the service bulletin. A battery by Relion happens to meet the specification.
Mercury Marine has issued a service bulletin that approves a number of their models for use with lithium starting/dual purpose batteries where the alternator of the motor does all of the charging.
I suppose that on the basis that Mercury says it is OK, many Yamaha, Suzuki, Honda and Evinrude...
