Question about Yamaha EF2400iS Portable Generator
Smart throttle does not respond correctly.Idles perfect when I start it. As i put it under small load it idles down instead of up, when I use like a hair dryer it comes to life and over revs until i choke it out or shut it off. I have cleaned the carb the speed limiter motor on top of the carb still no luck. I put a new carb assembly on thinken this would fix it and no luck . If I unplug the smart throttle and manually operate the carb by hand the Generator itself works and runs fine. I have checked wires for short and loose conections. The first problems with this gen started with surging then over time got worse .
Take it to a dealer, there is a solid state module inside that controls the charging and idle, also a wiring diagrams are available with owners manual, go to Yamaha web site also..
Posted on Apr 15, 2017
this prob happens allways in carburated engines that the car or motorcycle is running lean or rich . because the air - fuel mixture ratio is not right . so you should open the carburator and remove the air filter you will find two screws in the lower front section of your caeburator. you can adjust them by a screw driver until your car is smooth
Posted on May 31, 2009
The carbs need to be re-tuned for the exhaust. It doesn't seem like like it needs to be rejetted just idle mixtures adjusted. this would be something that a mechanic should do because there are four carbs and they need to be syncronized with each other
Posted on Jun 24, 2009
If 2 stroke check crank seals, check plug cap for proper resistance,check for good fuel flow to carb.Spark should jump at least a 1/4" gap,NOT JUST the .030 or plug gap.
Posted on Sep 08, 2009
hi buddy set the needle clip to its normal condition and also on the carb is the mixture screw you need to turn this all the way in and out 1 turns and try this you will always get a bog if you rev fully too quick i had this problem with my kx85 and it was just this hope this helped mate i will send the pic in a mo
Posted on Sep 17, 2009
Testimonial: "Appreciate the help. I've been all over w/ the air mixture screw. Still smokey and bogging down."
It sounds like your bike has been sitting in storage for an extended period of time (a year or more) - and the carburetors are plugged up. If this is the case, they will need to be completely disassembled and cleaned out.
If it hasn't been sitting (and the carbs aren't plugged up) then check that all of the normal tune-up items have been performed, especially valve adjustment, oil and filters, spark plugs, etc. If this fails to produce positive results, perform a compression check on the engine. Each cylinder must be able to produce at least 140 psi of compression in order to run and idle properly.
Posted on Nov 07, 2009
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