Flushing the motors

Vaguada · #1 03-31-2009, 06:23 PM

Hi! How long did an outboard motor should be flush? Its 5 or 6 minutes enough?
Thanks to the masters...

Blue197320 · #2 03-31-2009, 06:33 PM

that should be fine. i ususally run mine for about that time. i just let the stream get warm then shut it off

gofastsandman · #3 03-31-2009, 08:04 PM

You don`t want to flush a motor at more than half of the spigot volume on the muffs. The reason for this is that you can hydro lock the water passages with too much volume and not get cooling up to the top pistons on some motors. Motors have blown on the muffs because of this!
GFS

castalot · #4 03-31-2009, 08:20 PM

thats a new one.......interesting though
i've heard of not reving the engine idle to 1000 rpm only

what kind of motors are you refering to?

gofastsandman · #5 03-31-2009, 08:40 PM

96 ocean pro 150

thehermit · #6 03-31-2009, 08:59 PM

Until last year I never had issues on muffs. Run (Mercs/JohnRudes) until the thermostat opens and consider the flush complete. That said my new to me Yami 130 2 stroke (first yami for me) will not run on muffs. It runs, a few min pass, and the overheat alarm goes off. After replacing 100% of all cooling related parts the solution was....you need to run it in a barrel

. For some reason on muffs the bypass wont open allowing water to heads. The one upside to this is my neighbors and I learned how much more quite running in a barrel is

. This year I make a dedicated flush tank.

castalot · #7 03-31-2009, 09:06 PM

good to know my motors are 95's but i usually use a barrel as well
thanks
matt

Blue197320 · #8 04-01-2009, 12:38 AM

what did you make a flush tank out of?? i kinda want one too.

thehermit · #9 04-01-2009, 07:56 AM

Havent made it yet. When I do it will have a drain @ the bottom.

fishing_fanatic · #10 04-01-2009, 08:40 AM

I have the EXACT same problem with my 95 130 Yamaha! Runs fine in water but on muffs the alarm goes off after a few minutes. I put a bungie around the muffs to tighten them up and better seal around the intake but basically I dont run it long and dont rev it.

Had a mechanic say this is typical with Yamahas, too much water leaks out where as it doesnt in water or a barrel.

Quote:

Until last year I never had issues on muffs. Run (Mercs/JohnRudes) until the thermostat opens and consider the flush complete. That said my new to me Yami 130 2 stroke (first yami for me) will not run on muffs. It runs, a few min pass, and the overheat alarm goes off. After replacing 100% of all cooling related parts the solution was....you need to run it in a barrel

. For some reason on muffs the bypass wont open allowing water to heads. The one upside to this is my neighbors and I learned how much more quite running in a barrel is

. This year I make a dedicated flush tank.