Yamaha 12V Air Pump - Answered Questions & Fixed issues

you have fouled spark plugs change them all fixed all the newq yamaha sare doing it it is the in thing to do

You must try to crank it by hand ,remove spark plugs so there will be little compression and then try to turn the motor it should turn without to much force this will indicate the motor has not seized when hooking up a jump start do not connect both leads directly to the battery ! the red + lead should connect to the red+ on both batteries but the neg lead - should not go to the battery post but to a ground usually directly to the metal engine cover or you can damage the battery !

indicates that a component in the ignition circuit is overheating internally and failing could be a coil or cdi unit or any sensors if fitted

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Sounds like you have a bad stator. It may be producing enough spark to start the motor, but under a load (as in the water) it simply can not supply the amount of spark needed. Sometimes when a stator is tested on a ohms meter it may test good, but still be defective do to the load it will come in contact with when put in the water.

I have one as well. Same problem and it got worse until I had to prime the carb to run. Fix is simple. 2 carb kits off eBay. Approx $30 ea new. Takes about 2.5 hours to do. I have never done before so I thought it was easy. What happens is the carbs have rubber diaphragms in them that act as a fuel pump. My old ones were really thin and worn. The new ones thicker and better. Put it back together and viola. It starts on it's own. I checked all forums about shut offs and external primers, pop pressure etc. Just rebuild your carbs. You'll be fine.

Which check valve are u referring to? On the metering plate under the main diaphragm or the fuel pump side? The metering plate valve is held in with a plate and single screw the other side is held in with rubber grommets.

As bad as this sounds its the only way. Grab yourself a 2x4 and a nice size prybar.Lay 2x4 across the back grab handle as to not damage it then put prybar directly under seat latch and pop it up.

Counter clockwise, it has normal right handed threads. The only part with left handed threads is the pump/impeller shaft.

I have a 1998 Exciter with the same problem and the engine was replaced last year. Any answers yet?
Tom

no the remote is the only way there such a pain you have to buy one thats how yamaha gets you sorry

You have a low idle adjustment and a high in your carbs I would just try spraying carb clean wile running if not the rebuild carbs

Your carburators need cleaned probably a plugged main or pilot jet! check your spark plugs first thats simple and cheap

When replacing battery in yamaha GP1200 when attach negative cable the unit seems as wants to turn over the engine while the unit is off and no key in place.. also notice in seconds that the battery terminal on negative side started smoking..actually melt the new battery terminal on negative side..yes, postive was connected to positive. Any ideas what why this would take place??

Is the bilge working properly or is their excess water in the hull could be causing a short

Yamaha 4 stokes wont fire back up if you try to restart within 1 second of shuting it off.

sounds like your interlock is activated, enter your code!

not really sure what a wave runner 2 is, theres a 3 or are you talking about the original style Yamaha? is it a 500 or 650?

I have a 2006 gp1300r an it will start up an idle fine, but when u go to take off it does nothing. What can I do to fix it?

hose rubbing in next compartment where battery is