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