Yamaha 150 flushing

[neilda]

I spent some while today trying to flush my Yamaha 150A - harder than it initially seems!

Having hooked up the hose pipe directly to the engine (as per the manual) and turned on the water.... nothing! The quite reasonable water pressure from the hose was not enough to force through the system.

I then tried muffs. Same deal. Nothing. I turned the engine off pretty pronto assuming something was wrong.

However, in the water the tell-tale comes through just fine.

Does this engine require very high water pressure to be able to flush it out?

[C2 RIBS]

Originally Posted by neilda

I spent some while today trying to flush my Yamaha 150A - harder than it initially seems!

Having hooked up the hose pipe directly to the engine (as per the manual) and turned on the water.... nothing! The quite reasonable water pressure from the hose was not enough to force through the system.

I then tried muffs. Same deal. Nothing. I turned the engine off pretty pronto assuming something was wrong.

However, in the water the tell-tale comes through just fine.

Does this engine require very high water pressure to be able to flush it out?

Neil to ask what may seem the obvious, when you connect your hose with a connector to the engine are you putting the hose onto the flexible hose or as I did once onto the hose holder on the engine (hope that makes sense)

using this connector-- http://www.housemakers.co.uk/epages/...ParentID=14116 with the screw part into the hose on the engine the flush should work. It may not push fresh water all through to top of engine by the tell-tale unless high pressure. I would always use this method, never let me down on 150 or 250 Yam.

Water will work its way through the water system if you leave it on for 15 mins and dont turn engine on/over. Someone else will have a few more ideas but this should do it

I have added a pic of engine showing the flushing lead which is the rubber tube with connector just below and infront of the engine release on 250, but same place for 150, When you unscrew this you are left with the tube and hose connector for the above item to attach hose. This may make sense!!
The water may still not rise all the way to tell tale but will flush through

[Chris]

When I flush my engine I use muffs as I dont like the idea of the waterpump running empty, it normally takes about 15-20 seconds for the water to come through the tell tale.

[neilda]

Ian,

Where's the red face smiley thing?

Yes, your post made total sense - I'm doing it wrong. Yes, I attached to the body of the engine. Ooops!

Many thanks.

Chris, the Yamaha system (when, ahem, used, erm, cough, correctly) flushes the system without the need to have the engine on.

Thanks Ian, I feel like a prat - but glad I asked and glad you knew!

[BrAinZ]

So are you using the muffs to flush the engine now Neil?

Do you have to do that yourself or the nice people in the storage place?

[neilda]

There's no need to use the muffs on the Yamaha - once someone has helpfully pointed out which bit to attach the hose to, the rest is easy! The boat yard will do it if I ask...

[C2 RIBS]

Originally Posted by neilda

There's no need to use the muffs on the Yamaha - once someone has helpfully pointed out which bit to attach the hose to, the rest is easy! The boat yard will do it if I ask...

"IF YOU ASK?" This is a standard at Southampton dry stack

[neilda]

Originally Posted by C2 RIBS

"IF YOU ASK?" This is a standard at Southampton dry stack

Is it?

KB don't offer it as a regular service, it needs to be requested.....

[BrAinZ]

You say that you don't need to use the muffs... but I thought that if you ONLY flush using the attachment half way up the engine, then it doesn't flush the whole engine/gearbox completely.

I was told it's always best to fully flush things through by using the muffs.

[neilda]

I can't recall what the handbooks says, from memory flushing is only shown with the hose attachment at the top of the engine.