Tohatsu emergency cooling method.

[dtj]

Tahatsu 2.5, 2010 outboard.

If, while several miles out from a docking area, an impeller or other cooling failure were to occur, would it be possible to manually pump water thru water flow indicator tube while minimal throttling back to docks...............any reason to not do this in an emergency situation?..................Don

 

[TOHATSU GURU]

Re: Tohatsu emergency cooling method.

Seriously?

 

[dtj]

Re: Tohatsu emergency cooling method.

Seriously?

yes.

 

[pvanv]

Re: Tohatsu emergency cooling method.

The impeller typically does not fail all-at-once, in blown-fuse fashion. It also pumps a relatively large volume of water. I seriously doubt that you would have the auxiliary apparatus needed to provide that cooling water. Add to that the fact that you don't have access to anything more than the tiny check port (telltale), and the concept is not workable. Just check/replace the wp kit at the appropriate interval, and you should be fine, unless some unforeseen catastrophic problem were to happen.

 

[Sea Rider]

Re: Tohatsu emergency cooling method.

Better take a marine radio, cellphone with you and pray someone is near you

Happy Boating

 

[WN2712NJ]

Re: Tohatsu emergency cooling method.

Um, you do carry oars with you, right? Anything that can be moved by a 2.5HP can be rowed/paddled. Heck, with 2.5hp you might go faster with oars ;-).

There are a lot of other reasons you might get stranded that are more likely than a sudden and total failure of the impeller. The #1 thing that I've had happen is things rattling loose. The Nissan/Tohatsu/Mercury (all really the same) factory doesn't seem to know about Loctite. And my motors are all two cylinders, which run more smoothly than that one-banger will.

I've had screw/bolts in the tiller arm/throttle assembly/gear shift back out and fall out in less than 50 hours of operation. In one case it left us about a mile from the dock. Fortunately it was a nice day for rowing.

I've since disassembled all the small bolts/screws in the tiller arm and various linkages and put them back in with Loctite blue.

Running out of gas is apparently also a common cause of rowing practice. I keep a extra 1 gallon can of gas in the boat to avoid that one. For a 2.5HP, an extra quart or liter would probably do, but I don't know if they sell gas cans that small.

-dm

 

[dtj]

Re: Tohatsu emergency cooling method.

Um, you do carry oars with you, right? Anything that can be moved by a 2.5HP can be rowed/paddled. Heck, with 2.5hp you might go faster with oars ;-).

There are a lot of other reasons you might get stranded that are more likely than a sudden and total failure of the impeller. The #1 thing that I've had happen is things rattling loose. The Nissan/Tohatsu/Mercury (all really the same) factory doesn't seem to know about Loctite. And my motors are all two cylinders, which run more smoothly than that one-banger will.

I've had screw/bolts in the tiller arm/throttle assembly/gear shift back out and fall out in less than 50 hours of operation. In one case it left us about a mile from the dock. Fortunately it was a nice day for rowing.

I've since disassembled all the small bolts/screws in the tiller arm and various linkages and put them back in with Loctite blue.

Running out of gas is apparently also a common cause of rowing practice. I keep a extra 1 gallon can of gas in the boat to avoid that one. For a 2.5HP, an extra quart or liter would probably do, but I don't know if they sell gas cans that small.

-dm

Actually, I was kind of surprised at the many different thread lock and sealant applications that Tahatsu specifys in its service manual. Now, whether the factory actually applies all these different compounds during assembly of their own operations is another matter. The motor that I recently refurbed did indeed have various different compounds....................Don

 

[Sea Rider]

Re: Tohatsu emergency cooling method.

Um, you do carry oars with you, right? Anything that can be moved by a 2.5HP can be rowed/paddled. Heck, with 2.5hp you might go faster with oars ;-)

Oars are just for short distance travell, at the pier, beach, where you do not want to start your engine, keep in mind that sib will be completely bottom flat on water, with oars will have a tremendous drag to free, and if with wind, strong currents or heavily loaded, mission impossible. A 2.5 HP will move much better any sib than even rowing with 4 oars.

Happy Boating

 

[WN2712NJ]

Re: Tohatsu emergency cooling method.

Actually, I was kind of surprised at the many different thread lock and sealant applications that Tahatsu specifys in its service manual. Now, whether the factory actually applies all these different compounds during assembly of their own operations is another matter. The motor that I recently refurbed did indeed have various different compounds....................Don

I suspect that on the powerhead they do use Loctite or equivalent. The problems I've have had been with the exterior linkages in the tiller arm, gear shift, etc. One motor is a 2005 Merc 9.9 "Bigfoot", the other 2008 Tohatsu 20HP. I'm not sure if the same factory is responsible for assembly of all the external parts, or just the powerhead is built in a common factory. There aren't even that many visible differences between the powerheads on the Bigfoot and the 20, I think one is just a detuned and slightly smaller displacement version of the other.

I also had a significant oil leak issue with the Tohatsu after only about 25 hours, but the factory replaced the powerhead under warranty, and the source of the leak was never identified by the person doing the service. I'm hoping the next 20 years of service for these motors will be more trouble free than the first couple have been!

-dm