Honda BF75A Hot water

[teamplonker]

Hi All
I was flushing my Honda BF75A this morning running on muffs and noticed water coming out from the flush tube, but the water was hot
All other circulating water from telltale and prop was cold.

Is this normal ?

I only occasionally use the flush tube as i usually flush on muffs and have never noticed any water coming from here before.

Thanks
Lee

[teamplonker]

Hi All
I was flushing my Honda BF75A this morning running on muffs and noticed water coming out from the flush tube, but the water was hot
All other circulating water from telltale and prop was cold.

Is this normal ?

I only occasionally use the flush tube as i usually flush on muffs and have never noticed any water coming from here before.

Thanks
Lee

[Nos4r2]

I suspect the flush tube bypasses the thermostat and goes straight into the block.

[teamplonker]

Originally Posted by Nos4r2

I suspect the flush tube bypasses the thermostat and goes straight into the block.

Should there not be a non return valve

[R18628]

Our BF90 doesn't pass any water from the flush port. It goes to a check valve so should seal closed under normal operation and only open when mains pressure water connected to the port.

[teamplonker]

I have traced the tube back up to the check / non return valve and took it apart.
It was all scaled up so I descaled and cleaned it, I put it back together but it still has water flowing from the outlet port.

I just noticed that the water coming from the tell tale and the prop are a little warm / tepid. Is this normal ?

Can I just seal up the check /non return valve with silicone ?
Or is there likely something else wrong ?

[Nos4r2]

That looks like a poppet valve. Check the free length of the spring-it might just need a new one.

[teamplonker]

Originally Posted by Nos4r2

That looks like a poppet valve. Check the free length of the spring-it might just need a new one.

In simple car mechanic terms does free length mean how springy it is and if so would stretching it work possibly.

[JamesF]

I just noticed that the water coming from the tell tale and the prop are a little warm / tepid. Is this normal ?

I can't speak for the BF75, but our 2008 BF50 has quite a hot telltale — I'm assuming that Honda's preference is to tap into the plumbing after it's been around the block. (As opposed to our Mercury 2-strokes, which hardly even take the chill off — presumably the connection is pretty much the next thing after the pump on those).

[paddlers]

My understanding of the poppet valve function is to allow excess water pressure with the engine running UNDER LOAD (revving) to bypass the thermostat system and exit via the telltale !
The springs are probably available as part of a kit from a dealer. Having stripped it I'd just get the kit and forget about it !!
If I'm wrong blame the box of Pinot Grigio my wife and I are inspecting on Scotlands beautiful west coast........

[teamplonker]

I am hoping there are no another problems like maybe to much pressure or thermostat playing up.

[teamplonker]

Could'nt Wait.
I just took it apart again gave it another clean up and tested it by pouring hot water into it while putting pressure on the spring and no water came out the other side.
Cant start it up though to see if it leaks while running as my neighbours may get a bit annoyed.

[teamplonker]

Just started it up and nothing come out. Yipee