How long should delay be in seeing water from tell take?

[Nnelzon23]

Newbie here. Been searching the forum and couldn't find what I was looking for. I have a "new to me" 2003 Yamaha f115tlrb and it has quite a delay in seeing water. I have had the boat out 5 times and all 5 times delays have been about the same, 3-4 minutes at idle. The first time out a "dockside mechanic" told me that it is only a delay in the thermostat warming to where it is letting water through. I just wanted to verify that this is the case? My old 2 stroke runs water the second it turns over.

Thanks in advance for any advice.

[TownsendsFJR1300]

No, it should peeing like your 2 stroke, immediately...

I believe the Pressure control valve controls water pressure at the lower
RPM's and will likely be your issue.

Part #18 with spring, plunger:

http://www.boats.net/parts/search/Ya...201/parts.html

[Nnelzon23]

No, it should peeing like your 2 stroke, immediately...

I believe the Pressure control valve controls water pressure at the lower
RPM's and will likely be your issue.

Part #18 with spring, plunger:

2003 F115TLRB Yamaha Outboard CYLINDER CRANKCASE 1 Diagram and Parts

Thanks for the quick reply. Part is cheap enough. How much work is the install?

[TownsendsFJR1300]

Looking at the parts fisch, 3 bolts and a gasket.

[99yam40]

just hope the bolts all come out without breaking

[Nnelzon23]

Was reading a little more on the issue that I am having and had a couple follow up questions. I understand that you can't diagnose for sure over the forum, but wanted to see if you fealt the same about after further info.

In my search about the pressure control valve I have seen a lot of people comment that they have no tell tale at idle or that they overheat at idle. I have neither of these problems after initial start up. Once the engine is warm it runs water fine at idle the rest of the day, even after killing and restarting engine. It also has not overheated at all. Do you still believe the pcv is the most likely culprit? You all know a million times more than me so not questioning your advice, just want to be sure you have all the facts before I go tearing things apart.

[TownsendsFJR1300]

That's the most likely item to cause your issue.

Can you get a stream, (when cold), if you rev it up beyond idle (say 1200 RPMs)?

You can remove and inspect it and simply re-assemble with a new gasket
and your out a gasket.

Ref to your research, yes that's pretty much been posted here as well.

Yours may be just borderline failure, IE enough water to keep the engine from over heating. Salt build up perhaps hampering it as well?

I'd soak the bolts good with say PB Blaster or a good penetrant, depending on how much corrosion you have.. If the bolt(s) doesn't break loose (as expected), don't force/ break it off. Gentle tapping, heat should help.

[99yam40]

TT normally starts right away on the Yamahas I have seen,
but get stronger once the block fills completely.

I would be looking at installing a water pump kit and inspect the housing for signs of melting also

[Nnelzon23]

Thanks for all the advice guys. I suppose I will pull it apart and see what I can figure out. Hopefully corrosion and deposits are at a minimum. It's a freshwater only motor w less 100hrs. Will update if I figure it out. Thanks again.

[rodbolt17]

it is rather normal for a 4 stroke to take a bit to discharge water from the tell tale.

tell tale water is way prior to pressure control of t stat.

but it does take a bit to fill the water passages.

[TownsendsFJR1300]

it is rather normal for a 4 stroke to take a bit to discharge water from the tell tale.

tell tale water is way prior to pressure control of t stat.

but it does take a bit to fill the water passages.

Did you see 3-4 minutes, only when cold??


Something mentioned before by Yam99.
Being the engine is new to you, might be a good idea to R&R the water pump anyway.
You do not actually know its condition. Folks have fibbed before selling stuff..

[boscoe99]

My F200 would take about a minute and a half to pee if the boat was in the water. If on the flush muffs a while longer. If it pee'd at all on the flush muffs.

If the water pump is being submerged so that it is lubricated by water, and if the over temperature alarm is not sounding, then I don't think you will have a problem.

Some Yam two strokes will pee immediately. Like an old man, some four strokes can take quite a while.

[99yam40]

Good to know about the 4 strokes.
I figured Towns would have know this since he runs a F150

[TownsendsFJR1300]

Good to know about the 4 strokes.
I figured Towns would have know this since he runs a F150

Towns wouldn't know as mine doesn't take maybe 3 sec's to pump (all the time), and the video to prove it, cold start on muffs:

1st Link, Flushing F150 Video by SRT-60 | Photobucket


And the difference in the Op's engine between cold and hot, does NOT apply. After its warm, it pee's immediately. If his took a long time ALL THE TIME, I'd buy it, but it doesn't.. A difference of 4 minutes, BS..

[99yam40]

I guess like he said just some 4 strokes

does not make sense to me either why cold it has this problem.
making sure the pump is in good condition is still something I would do