For what its worth I only use the hose attachment on my 40 efi yammi. Never had a problem. I'm not sure why some people think yammaha would make a flush system that doesn't work. They probably tested it at the design stage once or twice I'd have thought.
The top flush port is for on water use,,,,,,,example on a houseboat etc where the engine can't be practically flushed,
The top flush port is to be used with the engine OFF.......thus meaning a cold engine and a closed thermostat.
I always use muff's......on the Yamaha 60hp in particular if you used muffs and ran the engine for say 5 mins and it got up to running temp then you shut it down and went on to remove the side flush port the water trapped in there would still be salt........then i would use the flush port for 30secs or so to rid it with the theremostat hopefully open.
Using the top flush port alone does NOT flush the lower end unit/waterpump and gallerys etc........I have taken this up with Yamaha mechanics as i was doing all the maintenece on 4x 60hp Yamahas.......they all agreed that muffs and port flushing were the only way to be sure.
A flush tank is another good way but you will still need to flush the small amount of saltwater trapped at the top flush point........A flush tank/bucket in my situation was not practical as the engines i was servicing were mounted on the roof of a mothership,
Confidence.......the feeling you get before you fully understand the situation.
Please provide documentation for this 'fact', Dan.The top flush port is for on water use,,,,,,,example on a houseboat etc where the engine can't be practically flushed,
Ring and ask your Yamaha dealer "mate'....Originally Posted by spelchek
Confidence.......the feeling you get before you fully understand the situation.
Funnily enough, I have checked with my mechanic. He's adamant that the flush port is the way to go. And after 350hrs my engine (according to him) is in great nick. No need to get all shirty fella - if you can't provide any yami documentation, tech bulletins or other proof of your claims that the top flush port is designed for "on water use" then all you're doing is reporting heresay. You should at least be honest enough to admit it.
Damn, I just use the hose port with the motor running, how much damage have I done in the last 7 years.
Hi, I have the 30 Yam, 4 stroke 09 model, and I was given a flushing bag, (with the hose fitting on it), that I use to flush my motor for between 5-10 minutes, and that works quite well. The only problem is you have to make sure you don't put a hole in the bag.(done once), but we patched it up well, and it's been working a treat for the past two years.
Cheers
Whoo up there buddy........i'm not getting "all shirty'......Having been talking to Yamaha here about self servcing as in our case was the motors may have been hundreds of miles from a Yamaha dealer and wanting to look after the engines and roll them over every 2 years the dealer and mechanics here told us use to muffs and port flush.
Sorry no documentation all word of mouth and considering the dealer was trading the engines back in every 24 months we just did what they told us.
If you don't agree......don't do it......simple.
Ps..... This what i am lead to believe.....seeing as they were Yamaha mechanic's i saw no need to really question them..........on the other hand they could be wrong and my information would also be wrong......Maybe a PM to Spaniard King will determine......he will possibly read this thread and reply.
Dan
Last edited by Dan5; 23-07-2012 at 02:12 PM. Reason: Add info
Confidence.......the feeling you get before you fully understand the situation.
It does on my 50hp yammie.
Anyway, six of one, half dozen of another. Every person I speak to says something different. Ask one mechanic he says muffs, as the next he says port.
I was told the same by reps from yamaha Australia at the rosehill boat show this year
Muffs for a full flush with engine on, hose port if you cannot run the engine for some reason
Can someone please explain to me how water gets to the waterpump when flushing via the top port?
So we have a waterpump with rubber impeler spinning away and pumping air ( if it is in good condition) all the way up the tube to the base of the block. It sucks in air from the usual spot. So the waterpump is dry !!!!????
Now the flush port and the thermostat. Which side of the thermostat does it enter? Just checking if by any chance the thermostats are bybass ones so the hose pressure actually opens them?
I don't have a yammi to see how they are set up but please get the yammi mechanics to explain how when using the flush port with the moor running the impeller isn't spinning dry?
I think some mechanics need to be careful with their advice and go the extra step and say that if port flushing then they should not have motor running depending on size and brand?
I'm not sure if they're the same kind of set up but when I bought my new Yamaha F300 the dealer I bought it off and my local service agent both told me there was no need to use flush muffs and that using the hose attachment on the top was sufficient.They both told me that's what that attachment is designed for.....the need not to use muffs.For all the doubters the two places in question were Broardwater Boating Center and Wynnum Marine.
Oh......yeah as a side note they told me to never run the motor using the hose attachment.
Apologies then Dan - i took your reply ('mate') to be a bit snarky, quite wrongly as it turns out. My belief (that flushing port use is fine) is also based on information from my yammi dealer and two of his mechanics (who I chatted to seperately on 3 different occasions about it). I would have thought that [with no mention in the manual of using muffs] that if it was considered better (by yamaha) to flush with muffs then a service bulletin would have been issued to dealers/mechanics.
I was told that if use port then the water enters from behind thermostat and opens it. I have 50 hpn4 st yammie. I have no ideas. I again only confirmed this with the boys at stones corner marine.
For what it is worth, I got the sameadvice for our Suzuki. Muffs rinse the whole system including waterpump, flush ports will rinse the block only. Do not run engine with flush port to avoid impeller damage. The suzuki has two flush ports, I understand that one is for the block,the other for the leg. http://media.suzuki.com/marine/uploads/df175-150.pdf
I like to give ours about ten minutes with the muffs on, and ensure that hot water is coming out of it. Have had a look inside when the service was done, and even with a religious flushing regime there is still an amount of salt buildup. Have been using salt-x since the last service to see if it makes a difference. One thing that I have noticed is that the sacrifical anodes cop a hiding, and it is reasonable to say that services should not be left beyond the 100 hour mark.
I can only assume that yamaha are of equivalent quality. Your best reference is the owners manual with regard to flushing instructions. If you dont have one, look for one online.
Posting Permissions
Reply With Quote