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I'm actually confused about the whole flushing thing. I've got twin 200 HPDI's on my boat which is arriving next Monday and I'm not sure how to flush them. It will be in a slip so I assume I have to use some sort of flush kit from Yamaha, but I'm not sure. The perrenial question that never seems to be solved here is whether it is better to flush with the muffs and running or use the fitting without running. Does anyone know what Yamaha suggests?
The Yamaha comes with the hose adapter already on the engine. Use that it will be fine. The only thing I am not sure of is if the thermostat opens or gets properly flushed where as when the engine is running the thermostat will open. In fact that may be the reason why everything looked great in the engine except the thermostats.
hmmm...so in order to get the most complete flush of all internal components the muff & engine running would be the way to go. the thermostat not opening when flushing while not running makes sense to me.thanks for the info guys.
JayB,
Twin 200 HPDI's on that boat is going to be sweet!! Good luck with her, your going to love those motors, trust me!!
As for flushing, relax, it's easy, it's a no-brainer... Just dock your boat, shut off, lift the motors out of the water as ussual. Get the water hose from the dock. On the port side of each motor is a small 1 foot long plastic hose with a normal garden hose female connector on one end which is screwed into a fake male connector on the cowling (plastic motor cover). Unscrew the connector from the cowling, and screw onto the end of your garden hose. Turn on the water and drink a beer or start cleaning your fish... That's it, you just let it runb for a few minutes and unplug and connect it to the second motor, drink another beer or clean some more fish (hopefully [img]/infopop/emoticons/icon_wink.gif[/img] ). DONE!! Takes five minutes, hassle free, and trust me, you'll love two things about it while doing it:
1. Just staring at your brand new shinney Yami's admiring them while drinkin a cold one! [img]/infopop/emoticons/icon_biggrin.gif[/img]
2. Watching the look on other peoples faces passing by saying: "WOW, those things [Yami's]have a fresh water flush connection!" [img]/infopop/emoticons/icon_biggrin.gif[/img]
As for the thermostat issue, I think 9 times out of ten, the stat is open, because I just came back from a long trip, the motors were hot, and I idled into the canal (read, the motors needed as much cooling water as possible..). So I bet the fresh water is getting almost everywhere. AND, think about this, my old motor, other than winterizing, I never once flushed after use for 12 years. So, is it missing a spot in the motor? Who cares!! [img]/infopop/emoticons/icon_wink.gif[/img]
Go to Sears Hardware (or similar) and find the gardening area. They sell a little garden hose inline on/off valve for $2. It has a male connecot on one side and a female on the other side, and is about 3" long with a on/off valve in the middle. Put it on the end of your dock hose, before your nozzle. So, when you grab your hose off the dock, you can turn on the water (at the dock valve). Now you can spray your boat off.... and when you want to flush, just turn the little on/off valve to off, unscrew your spray nozzle (since there is now no water pressure), and screw it onto your motors flush connector. Turn the on/off valve back on. Drink a beer... (you know the drill.. [img]/infopop/emoticons/icon_biggrin.gif[/img] )
This saves you from jumping off the boat, turning off the water, getting back on, screwing hose onto motor, getting back off, turning on water.........
No need to flush with muffs, the already supplied flushing attachment gets every part. The thermostat gets flushed, there is both a bypass and very limited flow through the thermostat even when closed. Only use the muffs when you want to run the engine and do some work or diagnostics. You will get thorough flushing with the suppliedattachement, and there is no need to run the engine.
plus your replacing your thermostats every 12 months anyhow. i have never flushed with muffs and the inside of my 97 looks like new.
like bird said have a beer.
