Starter Switch Assy

[Harley Rider]

I think I have narrowed down my problem to this switch (6H3-14380-00-00). Boats started sluggish then stalled out 200yds off dock. Wouldn’t start back up. Seemed like it was starving for gas. I replaced every line from the tank to the motor with single walled good lines. New primer ball and filters as well. Still wouldn’t start. Shot of started fluid and it starts right up and stalls. So we have spark but no gas. Pulled apart the fuel pump and checked diaphragm. Alls good. Took the exit line off the pump and cranked it over. Shot gas right out. So at this point I knew the gas was making it to the carbs and I have spark. Removed the air cover from in front of the carbs and see a red switch. On the cover it states for emergency turn lever. I did and the engine fired right up.

So I am assuming the Starter Switch is my problem. Can it be anything else? Can this switch be fixed or needs to be replaced? Should I check anything else?

Thank you

Jay

[boscoe99]

What is the model of the motor?

First make sure the fuel enrichment over ride switch is set correctly.

[Aquasportfisher]

Please give us engine model #'s.
The emergency lever is the enrichment lever. Your motor has automatic choke. The enrichment lever simply adds extra fuel. Your problem is fuel related. More than likely clogged jets in one or more carbs. Get yourself a Yamaha service manual and work your way through rhe entire fuel system.

[Harley Rider]

Thanks guys

I don’t know the model. I bought the boat new in 2006 but see a sticker on the motor that states made in 2005. There’s no manual choke. Pushing the key in does nothing. I believe it’s automatic. The sticker on the outside rim that shows model number is not there. Where else would I find the model number?

The fuel enrichment switch is what I turned to get the engine to start. It stays running with that switch on open.

I have gone over the entire fuel system to the engine. From inside the tank to the engine is all new. I took a gas line directly to the engine from gas can to insure it wasn’t something from that area. Fuel pump is working fine. It’s after the fuel pump.

If it was the jets I would think it would still start or run after I hit it with starter fluid. It won’t. Drop of starter fluid fires it right up and dies just as quick even when giving it gas. Is there a way to test if the enricher is the issue?

[boscoe99]

So, to be clear, when the red lever is in the automatic position the motor does not start worth a darn when cold?

How about when the motor is warmed up? Does it start and run well then with the red lever in the automatic or off position?

And you have no idea as the model? You don't know if it is two stroke or a four stroke or even the horsepower rating? Strange.

The enrichment device is known as Primestart. You can remove the device and measure the length of a pin/needle that you will see. The pin is normally retracted when cold and if you apply 12 volts to the Primestart you will see that the pin extends. Or at least it should anyway.

[Harley Rider]

Sorry, I thought there was more than one model in 2 stroke. Mine a 90hp 2 stroke oil injected. I think it’s a F90TR. Not positive.

No won’t start at all in automatic position. If I hit it with started fluid it fires right up and dies. No idea if it works when warm. I can check that later when I get home.

Question: when I turn on the key should the automatic choke do anything? Should it open the buttery a little? Nothing happens I’m just wondering if it should.

[Harley Rider]

Also have a good site for Service Manuals?

[boscoe99]

The site that we are on is as good as any for genuine Yam service manuals.

Your engine does not have a choke. So, when you turn the key on, or push the key in, nothing happens.

The Primestart device is a fuel enrichment device. Like a choke it provides for extra fuel being supplied to the motor when the motor is cold. The pin within the device is retracted which allows extra fuel to pass through the carburetor.

Once the motor is started it supplies 12 volt electrical power to the Primestart. As the motor warms up so too does the Primestart device. As the Primestart warms up the pin within the device is extended. It extends to the point that it prevents extra fuel from going to through the carburetor to the motor.

It is a five minute job to take the Primestart device off the motor. Pull it off and see what you see.

Does your motor start and run OK once it is warmed up? You said you turned the red lever to the Open position and the motor starts fine when cold. Once the motor is warmed up, if you turn the red lever to the Close position how does the motor run?

[99yam40]

Sorry, I thought there was more than one model in 2 stroke. Mine a 90hp 2 stroke oil injected. I think it’s a F90TR. Not positive.

F90 is a 4 stroke not a 2
But I would say you need the carbs pulls apart and cleaned and adjusted after reinstalled.
If it will not run after starting with help then carb passages/jets are plugged

[Harley Rider]

I didn’t have any time last night to work on the boat. I did try to start the engine and see if it started once warmed up. Since I couldn’t get it started it seems that enricher was not the issue. Jets are next in line to check out.

How is it that the jets get clogged up enough to shut it down without any prior signs? If it was just one jet wouldn’t it start and then miss fire?
Since day one 7 yrs ago the boat always starts with a single turn of the key. I use this boat all winter long a couple times a week in freezing weather and she has never failed. Guess I’m lucky I have had zero issues thus far.

On that note my trailer has broken down twice in the last month. First snapping a leaf spring in RI and then just the other day I blew out a set of bearings. Lucky per I just trailered it back from Cape Cod a day before.

I'll get to work on it this weekend and post what I find. Thanks for your help guys.

[Harley Rider]

As for buying the service manual from this site, should I be clicking on the Boat.net link? Don’t see any links on Yamahaoutboardparts site. also can't find them on the boats.net site.

[Harley Rider]

PROBLEM SOLVED!!!!

Talks with 3 diff Yamaha certified mechanics wasn’t as helpful as you guys have been. So THANK YOU very much for all your advice.

I’ve rebuilt 5 or 6 carbs this year per gas sitting and turning to shellac. Lawn tractor, snow blower, rototiller and more. I knew there was no way I could have clogged jets in the boat per I use the gas up and replace it almost daily. After doing a little more research on the gas enricher I checked it out and found it was working properly. So pulling the carbs was next in line. Only had to get one carb off to find my problem. WATER!!!!!

The dam bowl was half filled with water. Water/gas filters are only made to catch drops of water. When your gas tank has a hole in it and a cup of water hits the filter at once it gets pushed and passes right by and fills up the carbs. My 7 yr old boat has a custom aluminum gas tank that is not coated in any way. So with sea water and sand making their way on top of the tank it pitted out multiple holes. Un freaken real this could happen to a 7 yr old tank. Cars are exposed to everything and the gas tanks last forever.

I blew out and then vacuumed out every drop from every line, filter, fuel pump, and so on. Dropped the line into a gas can and pumped the ball. Fire up on the first click.

Now I am going to take apart the CC and yank the tank. I can see from the access hole 3 quarter inch pitted holes on the top of the tank. I’m going to yank the tank out and see how bad it looks. If not bad I’ll sand blast and patch. Then coat the tank with a bed liner or something prior to sticking it back in.