Yamaha Outboard Motor Fresh Water Flush Procedure

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Author Topic:   Yamaha Outboard Motor Fresh Water Flush Procedure

BQUICK posted 06-02-2006 09:22 AM ET (US)
I bought a Florida boat that was lift kept and flushed after every use. I am bringing it to the brackish water of the Upper Chesapeake Bay and leaving the boat moored in water.
Options:
1. Flush only after season, that is, let it [corrode]. They are old motors, anyway;
2. Flush with earmuff attachment after each use. This is not too practical or effective in the water;
3. Hook up something similar to later models with a flushing port, even maybe thru the water pressure gauge ports.
The Yamaha engines are 1989 200-HP V6.
Sal DiMercurio posted 06-02-2006 09:46 AM ET (US)
Remember, Yamaha's must flush with the dual earmuff attachment that feed water from both sides, not just one side as most muffs do.
Sal
montauk madness posted 06-02-2006 11:21 AM ET (US)
Wow. Sal, is that true? I also have a 1989 Yamaha 200 and I've always flushed it with a single earmuff attachment. The earmuff attachement came with the boat when I bought it and I guess I wrongly assumed it was OK.
Jeff
PeteB88 posted 06-02-2006 12:59 PM ET (US)
I have 1392 Yamaha 40-HP and hadn't heard [about the recommendation to use a dual earmuff adapter] before. I use a single earmuff adapter. As well, I remove the screens from both sides of the lower unit before I attach the muffs. Please advise more
Thanks.
Sal DiMercurio posted 06-02-2006 01:34 PM ET (US)
Unless they changed it in the last five years, that is the [recommendation].
You need to buy the dual earmuffs at the Yamaha dealer or West Marine carries them.
Sal
BQUICK posted 06-02-2006 01:49 PM ET (US)
So what do you think of option #3? The same 2.6 block is still used now but has a flushing port. Where does it feed in?
Sal DiMercurio posted 06-02-2006 04:57 PM ET (US)
Bquick, what do you mean by feed in? If it has a flushing port that is where you screw the end of the hose on. It feeds through the water circulating system of the engine.
Sal
jimh posted 06-03-2006 08:45 AM ET (US)
[Changed TOPIC; was "89 Yamas flushing" which seemed like an article about an airport bathroom in South America.]
I am sure he's asking where in the cooling system the flushing adapter hose is connected in the engine.
BQUICK posted 06-05-2006 10:35 AM ET (US)
No Sal...these earlier motors don't have a flushing port. I would like to drill and tap and add one. It uses the same old 2.6 block so I was thinking if someone has a later motor they could see were it taps in.

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Author	Topic: Yamaha Outboard Motor Fresh Water Flush Procedure
BQUICK	posted 06-02-2006 09:22 AM ET (US) I bought a Florida boat that was lift kept and flushed after every use. I am bringing it to the brackish water of the Upper Chesapeake Bay and leaving the boat moored in water. Options: 1. Flush only after season, that is, let it [corrode]. They are old motors, anyway; 2. Flush with earmuff attachment after each use. This is not too practical or effective in the water; 3. Hook up something similar to later models with a flushing port, even maybe thru the water pressure gauge ports. The Yamaha engines are 1989 200-HP V6.
Sal DiMercurio	posted 06-02-2006 09:46 AM ET (US) Remember, Yamaha's must flush with the dual earmuff attachment that feed water from both sides, not just one side as most muffs do. Sal
montauk madness	posted 06-02-2006 11:21 AM ET (US) Wow. Sal, is that true? I also have a 1989 Yamaha 200 and I've always flushed it with a single earmuff attachment. The earmuff attachement came with the boat when I bought it and I guess I wrongly assumed it was OK. Jeff
PeteB88	posted 06-02-2006 12:59 PM ET (US) I have 1392 Yamaha 40-HP and hadn't heard [about the recommendation to use a dual earmuff adapter] before. I use a single earmuff adapter. As well, I remove the screens from both sides of the lower unit before I attach the muffs. Please advise more Thanks.
Sal DiMercurio	posted 06-02-2006 01:34 PM ET (US) Unless they changed it in the last five years, that is the [recommendation]. You need to buy the dual earmuffs at the Yamaha dealer or West Marine carries them. Sal
BQUICK	posted 06-02-2006 01:49 PM ET (US) So what do you think of option #3? The same 2.6 block is still used now but has a flushing port. Where does it feed in?
Sal DiMercurio	posted 06-02-2006 04:57 PM ET (US) Bquick, what do you mean by feed in? If it has a flushing port that is where you screw the end of the hose on. It feeds through the water circulating system of the engine. Sal
jimh	posted 06-03-2006 08:45 AM ET (US) [Changed TOPIC; was "89 Yamas flushing" which seemed like an article about an airport bathroom in South America.] I am sure he's asking where in the cooling system the flushing adapter hose is connected in the engine.
BQUICK	posted 06-05-2006 10:35 AM ET (US) No Sal...these earlier motors don't have a flushing port. I would like to drill and tap and add one. It uses the same old 2.6 block so I was thinking if someone has a later motor they could see were it taps in.