1997 yamaha s200 txrv (saltwater series II)

[mobilereef]

Several questions are in need of answers, and I am hoping that someone can take a minute to help out.

1) What is the proper way to flush this motor
2) Motor started surging at about 3400 rpm after 25 minutes use.
3) When at 4400 rpm, overheat alarm came on. I slowed...waited until alarm stopped, and continues at 3400 rpm with no alarm.
4) Where can I get a service manual for this motor for free or cheap.

Thanks for the help, I am new to outboards so any advise is greatly appreciated.

 

[Five Spice]

Re: 1997 yamaha s200 txrv (saltwater series II)

http://forums.iboats.com/showthread.php?t=467943

look at this thread. There are many more out there with the same problem you are having with the cutting power after alarm at 4000 rpm. Look at the "similar threads" section at the end of the replies. Some of the "fixes" can be pretty intimidating, butthere are guys on the forums who are pretty experienced, knowledgable and have patience with all the rest of us.

I have a 2000 ox66 and it has a hose connector on the passenger side of the motor that can be unscrewed from the motoer and attached to a water hose and Yamaha says you flush it this way without running the motor. Just make sure water is coming out of the "**** hole" in a strong steady stream. I also put the muffs on every other outing or so and run the motor to flush as well...just makes me feel better.

Welcome to iBoats.

 

[Captn Dave]

Re: 1997 yamaha s200 txrv (saltwater series II)

Where's Rodbolt when you need him?
You have a carbed motor. It's not fuel injected.
Flush with muffs. Put the muffs on, turn the tap full open, start and run engine and make sure you have a tell-tale stream.

The overheat could be a pump and/or thermostat problem. When was the last time the impeller was changed?

Not sure about the surging. Might be the lift pumps. The diaphrams are known to go bad. Loosen the bolts holding the pumps to the block. Pump the primer blub and check for gas leaking by the diaphrams. If the diaphrams have never been changed, replace them.

Might also be the carbs. Drain the carb bowls, catch the gas and look for debris. If there is any crap in there, they're in need of a rebuild. You can get away with just changing the float bowl gaskets for the rebuild.

When is the last time you changed the fuel filter/water separator?

Do you have updated fuel hoses from your tank to the filter? The ethonal will deteriate the hoses.

Get the Yamaha manual.

 

[mobilereef]

Re: 1997 yamaha s200 txrv (saltwater series II)

thanks guys for taking the time to get back to me on these issues.

First, I noticed what looks like a lawnmower fuel filter, and not fuel/water seperator. I changed that out with a Racore (the white and blue one with the clear bowl on bottom). Next removed lower unit and noticed impeller was crap. replaced that, noticed seals were basically trashed (springs broken, and brittle) there was very little water in the gear oil, replaced that. Felt and sounded like the upper bearing where the drive shaft sits was pretty gritty, did not have the funds to change that yet. New plugs, fuel filter changed (assemble was fine). I will run the boat as soon as I get back in town to check it out.

When I put the muffs on, and blast the water, is water supposed to squirt out the sides of the muffs?

I will post with outcome soon...and again, thanks

Chris

 

[Captn Dave]

Re: 1997 yamaha s200 txrv (saltwater series II)

Yes, water will squirt out the sides of the muff. These engines need plenty of water on the muffs, that's why don't hesitate to turn the tap all the way open.
If it still surges don't push it. Slow down and find the problem.