Can rich mixture cause overheating?
Yes! Running rich will make one overheat. And lowering the temperature of the T-stat won’t make one run cooler. Once the T-stat opens you are gonna get what you get as far as temperature!
Can lean fuel mixture cause overheating?
The engine may be creating too much heat due to factors other than the cooling system. A proper air/fuel mixture will help your engine run cool and to its full potential. Most overheating issues related to air/fuel ratios are the result of a lean mixture, which causes the cylinders to run hotter.
Is the overheating alarm on my Yamaha outboard still working?
The wires were still pliable. Yes, as far as it seems to me, the overheat issue is resolved – no more alarm, tell tale is shooting water, engine doesn’t appear overheated and not shaking vigorously anymore.
What should I do if my Yamaha buzzer overheats?
Boat is normally in river water with little operation in salt water…always run boat in river after salt water. Several dealer mechanics have tried correcting. Mechanic says engine is not overheating because he can touch both heads with hands. Approximately 550 hours total on engine.
Is there a high temperature alarm on a Yamaha 115?
I have a 1994 Yamaha 115 that gives high temperature alarm when I run at high speeds (4200 rpm)– when alarm sounds, engine starts running rough (as per manual) until it drops under 2000. It acts normal at low speeds…go to high speed and it will give high temperature alarm. Slow down to under 2000 rpm, the alarm will stop after a few minutes.
Can a non-authorized dealer fix a Yamaha impeller?
One “Yamaha” authorized dealer put in a non-Yamaha impeller. Problem continued. After 2 trips to 2 different “Yamaha” repair shops an old guy in Arkansas put in a Yamaha impeller and cleaned out the tubes, water jackets, where ever the water flows around the heads through (I,m obviously not a boat mechanic) and the problem stoped.