Breather all foamy?

[SJet]

I have noticed a grey, foamy, watery kinda stuff on my breather plates?
Does anyone know what could cause this?

By the way my ski runs fine. I have v-vorce delta 2 reeds.

Thanks

 

[Matt_E]

Time to pull that intake manifold and inspect those reeds.

 

[SJet]

Okay, will do.

These reeds were new this year?

So, the grey,foamy watery sorta stuff ain't normal eh?

 

[Matt_E]

Not normal, no.

 

[SJet]

Hummm

Likely lazy reeds. When I take em out and look at them up to a light, if they are open just a hair, is that the problem?

I know they are not broken, cause the boat runs very strong!!

 

[Matt_E]

They should all be closed, and have some tension on them.

 

[SJet]

I'll check them out tomorrow. How long do v vorce reeds usually last?

 

[feartheride]

Thats just water mixed with gas.When you get water in your breather it mixes with gas

 

[SJet]

Yeah, that makes sense. I know there is water in this grey, foamy stuff. So is this okay?

I do get a fair amount of water in the hull. I don't have a scupper yet.(comming soon)

Like I said before, the ski runs fine.

 

[Matt_E]

The only time I have seen that in the arrestor is when the reeds are damaged.

 

[SJet]

How did the ski run?

 

[T-bone]

if you have a broken reed you will notice a performance loss.

 

[SJet]

Yeah, but if the reeds are just not closing all the way, you might not notice any performance loss, right?

 

[T-bone]

the reeds may not be closed at rest but they are closing during operation.

 

[douglee25]

They should all be closed, and have some tension on them.

I disagree. In fact, there is usually a little clearance. Most repair manuals will actually call out a spec where you can measure the distance with a feeler gauge. If there isn't a huge gap between the reed and the cage and chunks of the reeds aren't missing, chances are they are still good.

Doug


Edit: Concerning the oily substance, as the gas is atomized in the carb throat, some of this gas/oil mixture 'squirts' up and lands on the breather plates. Now as you ride, dump the ski, take on some water, etc, the two mix and there's what you're probably experiencing.

 

[sjetrider]

Yeah, but if the reeds are just not closing all the way, you might not notice any performance loss, right?

If reads are worn or chipped you will notice bottom end and issues, but not mid to top usually.

 

[Matt_E]

I disagree. In fact, there is usually a little clearance. Most repair manuals will actually call out a spec where you can measure the distance with a feeler gauge.

:bad3: I've never seen that - not in print, and not in reeds. I'll check the Yamaha Manual tonight.

I pretty much guarantee that at least in the case of VForce reeds, they should be closed and have tension on them.

Edit: Concerning the oily substance, as the gas is atomized in the carb throat, some of this gas/oil mixture 'squirts' up and lands on the breather plates. Now as you ride, dump the ski, take on some water, etc, the two mix and there's what you're probably experiencing.

In a properly working intake system, gas/oil mix shouldn't be "squirting up". It gets sucked into the motor. I don't know about anyone else's carbs, but my carb throats and the insides of my flame arrestors are dry.

Unless I got busted reeds, then I get said water/oil/gas mix.

 

[douglee25]

Boysen recommends replacing if the reed sits greater than 0.010" (10 thousandths) away from the reed block.

Doug

Edit: Just found it. Scroll down to "How do you know when it is time to replace the reeds"

http://www.boyesen.com/article/articleview/4/1/5/

 

[Matt_E]

Thanks.

Also, check to see if the reeds are sealing against the reed block surface. If the reeds sit more than 10 thousandths of an inch off the surface of the reed block, it is time to replace your reeds.

In other words, make sure they seal. I think most folks would have a hard time telling 10 thou of an inch.
If you can see a gap, it's time to replace.

 

[douglee25]

Thanks.



In other words, make sure they seal. I think most folks would have a hard time telling 10 thou of an inch.
If you can see a gap, it's time to replace.

I'm telling you without a doubt that any time I've ever replaced reeds, they have never sat completely flush. Never. Not on my dirt bike, not on my jet ski. Maybe something was warped?? I don't know, but I remember looking into it years ago and found a spec for a gap. Everytime the gap was within spec, so I've run 'em. Different strokes for different folks? :biggrin:

Doug