No water from the tell tale?

[Johnshan1]

I have a Yamaha 150 not sure of the year- mid 90's?

I put it on the water hose tonight and started it up, no water from the tell tale so I assume a bad impeller, well I took it apart and it looked fine.

So heres my question- do the thermostats have to open up to allow the tell tale to shoot water? Or is there an obstruction upstream of the pump?

If there is an obstruction can I just use compressed air to clean the water passage?

Or perhaps my water hose ear muffs are not enough for a V6 150 hourse engine?

Please advise! Thank you!

 

[jerkin]

Re: No water from the tell tale?

My f115 doesn't work on the muffs either. I need to submerge it up to the cavitation plate before the water will come out. I actually burnt the water pump when I first got it trying to get it to work with the muffs. I don't bother with them anymore.

 

[bicoastal]

Re: No water from the tell tale?

Same problem with my '97 Yamaha 50hp two stroke. No water from the tell tale. I replaced the impeller yesterday, got a strong jet on the muffs and at idle on the water. 5 minutes out the flow slowed to a dribble then stopped.

The engine is still cool to the touch , and lots of warm water is coming out the lower unit with the exhaust.

Think this is just a floating obstruction in the sytem? Is there a good way to clear that out?

Thanks

 

[Johnshan1]

Re: No water from the tell tale?

Well I replaced the water pump, while doing so I had the lower unit off, stuck the end of my pressure washer into the water pickup tube, water ran out of the exhaust but nothing from the tell tale. I put the pressure washer nozzel to the tell tale and blasted it for a good 25 seconds or so, then blasted up the water pickup tube again and all is well- tell tale is strong.

I assume there is debris in the tell tale water line caushing issues for us all. When I fired it up on muffs I had a very strong tell tale! Life is good!!

 

[bicoastal]

Re: No water from the tell tale?

Congrats! The water blast worked for me last week. Unfortunately it only lasted until I was out on the water!

However I was blasting from the bottom up with the lower unit off. I'll try from the tell tale down. Wish me luck!

 

[Johnshan1]

Re: No water from the tell tale?

Good luck!

I even get water from the tell tale as I crank the engine to start it now!

 

[bicoastal]

Re: No water from the tell tale?

I took the heat exchanger apart; bug carcasses near the tell tale. I cleaned them out and everything works great.

Got the carbs tuned up by the local Yamaha dealer so I'm as good as new!....for now

 

[Ray Neudecker]

Re: No water from the tell tale?

Many times the problem can be with the tale tell having debris or dirtdobber nests in our area,. I always remove the hose from the block and make sure it is clear there first.