Yamaha 2000 50hp 2-stroke weak/no tell tale

[renegade15]

I have a c50tlry, two weeks ago had a great strong tell tale stream, last weekend had a weak one, that faded to barely a trickle when idling.
I dropped the lower unit and the impeller is in great shape, only a month old to begin with. The housing and cup look fine too. I put it back together and still weak tell tale. I checked the thermostat and it is not pretty, but it does open and close. I kept it out and put the t-stat cover back on and started it to no avail. I checked the tell tale hose and it is all clear, just a trickle comes from the barb on the bottom of the exhaust cover where the tell tale water comes from.
I'm relatively mechanically inclined so I don't mind pulling parts to check, just need to know what to look at now!
SO...???
What next?

 

[99yam40]

Re: Yamaha 2000 50hp 2-stroke weak/no tell tale

blow some compressed air up the tell tail while idling to see if that moves somethings around and get your flow back

 

[Hoosmatroos]

Re: Yamaha 2000 50hp 2-stroke weak/no tell tale

Or try to put a small rod in the hole. Lots of time some debris is blocking the exit