2018 SVHO COOLANT UPGRADE FLOW/CHECK valve

[jolson]

I’m in the process of a 18’ SVHO stage 2 upgrade.
I had done the coolant hoses in the hull and moved on to the Valve retainers (not sure why we pay for that… actually I am).
I found this flow valve laying in the rear of my ski.
I remember seeing it on install, but now it doesn’t ring a bell.
I assume it’s on one of the 4way valve/X valve ports..

I looked through the service manual and it doesn’t go into that detail.

any pointers?

[K447]

[… the Valve shims ( not sure why we pay for that… actually I am). …

Are you talking about the shims in the valvetrain for the engine?

What are we paying for?

[jolson]

I am. Actually I used wrong nomenclature . The Valve retainers.
top of spring.

shit I need to edit that. I was at bar…

The titanium retainers were the same spec as the OEM. But titanium. I had read that they were thicker to reducer floating valves in a couple places…. But not.
After ordering the tool, 279$, for a 83mph stage 2. It hardly seemed worth it.

Thanks for catching that.

[FAMT]

this red silicon part what you are showing here is not an yamaha part, never saw that anywhere and i build several skis and engines
2nd you need the TI retainers when you want to spin more then 8700 rpm. the point here is the weight on the retainers.

[jolson]

Well damn. It’s also not in the kit instructions.
I have a email off to Riva regarding this.

I understand the retainer purpose. Just was thinking that for a stage 2 these were chasing minuscule amount of RPM. And now I have this cool tool to hang on my wall.
BUT much mor intelligent people designed it sooo, I’ll run with it.

I appreciate the response.

[FAMT]

the riva valve train tools is way overpriced as everything else from them. you cn buy an an similar tool on amazon its a lot cheaper like 30 bucks.
again you red silicon part is not an yamaha part and not an riva racing part.

[jolson]

Unfortunately as I shopped for the tool, the Amazon one never came up, like they typically do. It sure is Perty though.

Righton. I’ve had this ski, 2018, since 20’ with 6hrs. Stock pristine. Can’t figure out why it was in the hull.

I guess I’ll hang it on the wall next to the tool.

👍

[NAL-E]

That is Yamaha part it is either from electric bilge pump hose or the venturi suction hose. It is there to stop backflow of the water in to the hull. Though I think it is unlikely even without that.

[jolson]

That is Yamaha part it is either from electric bilge pump hose or the venturi suction hose. It is there to stop backflow of the water in to the hull. Though I think it is unlikely even without that.

I don’t believe I touched any part of the bilge pump lines.
can you give me a description/location for the Venturi suction hose.
This was laying in the rear by the four way junction .
as stated, I was doing the cooling upgrade.

thank you

[jolson]

That is Yamaha part it is either from electric bilge pump hose or the venturi suction hose. It is there to stop backflow of the water in to the hull. Though I think it is unlikely even without that.

Yep you nailed it.
Mark from Riva got back to me. I had disconnect the line from the 90degree fitting going to the bilge pump. It sits right in there.

Thanks again.

[FAMT]

as i said its not part from the colling system the ski doesnt have an electrc bilge pump either
maybe you are talking from the syphon system on the ski

i never saw this part anywhere

[jolson]

as i said its not part from the colling system the ski doesnt have an electrc bilge pump either
maybe you are talking from the syphon system on the ski

i never saw this part anywhere

I admit I am a novice and have learned a shit ton from this install. How ever sometimes I am just wrong. But not here.

[jolson]

I do appreciate the knowledge the internet provides. Hell I couldn’t get through allot of jobs or…. On my HD without my brothers on the forum.
thank you for all replies, it definitely made me dig harder to get the correct outcome.