The prop could have been the problem. It seemed to choke/overheat when running at higher speeds. It came back from the boat yard last spring with several broken parts inside - not sure who's fault it was.
The prop could have been the problem. It seemed to choke/overheat when running at higher speeds. It came back from the boat yard last spring with several broken parts inside - not sure who's fault it was.
Craig:
We purchased a 6hp 4-stroke Tohatsu last year and LOVE it! It has been a great outboard. Moved our little Ariel from Cape Canaveral to Wilmington up the ICW without a hitch. Fits very nicely in the well. The long shaft doesn't cav even on a major heel.
BTW I have a used Suzuki 6hp 4-stroke for sale. PM for details but it's a great little motor too! New water pump and carby and fresh paint.. 2003 model I think?
Andrew
Somewhere on this site is a picture??
The boat yard owner just told me that the parts on my moter weren't broken but that the bracket holding them on melted due to the overheating problem. Just exactly what caused the overheating, I don't know.
Failure to regularly fresh water flush an ob can lead to salt build up in the ob's water pump and its water cooling channels. Been there, done that. Almost ended up on the beach! The old Johnson, however, stopped running before it started melting anything.Originally Posted by JBM
I just took a look at a Merc 6 (Of course same as the Nissan & Tomatsu) and noticed that the zinc is a TINY little square on the side of the lower unit. It look about 1" square.
Has anyone had a problem with them eroding really fast? It seems like it is about 1/4 the size of the one on the Yahama... seems like it would go really fast?
What have you seen?
On edit; Did find some discussion on OB motor zinc's here. Nothing addressing the little zinc on these motors though....
Last edited by c_amos; 06-05-2008 at 06:18 AM. Reason: To add link to prior zinc discussion.
Well, I just pulled the trigger on getting the little Tohatsu 6hp from onlineoutboards.com.
The price was right at $1265 with free shipping. They are out of stock on both of their lower pitched props.
I notice they have both a standard 6" pitch prop (~$65) and they also carry a new 5.99" 'High thrust' prop (~$100). The high thrust prop has large flat blades like the Yamaha high thrust prop does.
So now I have 2 questions for the users of the Merc / Nissan / Tohatsu 6hp.... I am still wondering about the zink, and would like to hear from anyone who may know if the new 'high thrust' prop is worth the extra $135?
Thanks,
Last edited by c_amos; 07-01-2008 at 07:47 PM.
Craig
Hubba-hubba. Is that the extra-long shaft? With the charging system? And the verticle pull??
Long, long ago Mike made a well grounded point that the prop pitch we wanted for our boats, running a small HP 4-stroke was a 7" pitch. Something about allowing the engine to run in the proper RPM range without getting a lot of slip.
Sorry I can't add anything useful to the zinc question. Would composition of the metal the zinc is attached to make a difference in the rate of oxidation/disolution?
As soon as the O'day sells online gets a hunk of money from me too!
Yup, the first one eroded very quick a (about 2 months) and then the bolt broke off trying to change it, then I drilled through the plate with a bigger one that was sacrificial enough, so I ended up ruining the lower end. Tohatsu 6hp long shaft #1.
Above was in reference to the the question some time ago about the zinc. In a more general review of the Tohatsu/Nissan/Merc 6 HP I will say that they seem to have really small jets and I am having trouble keeping the motor running more than 4 weeks. I started the season with new gas after having had the engine serviced for trouble last season. I treated with Stabil Marine and within 4 weeks the carb was clogged with white mush. I cleaned it a few times and used Sea Foam. It started running again but 4 weeks later it was so clogged that I took it to a marina along with the line and the tank. They pronounced my gas fine, cleaned the carb and now 4 weeks later the carb bowl has white mush in it again and the motor wan't run. The marina talked me out of using aviation 100 low lead saying it would clog the rings but if I get that thing going I'm switching to ave gas and if that fails I'll sell that and move on. Which which other motors fit because I've had enough of this one? I didn't have much time to use it so basically this ruined the season. I've had guests waiting on board the last few times which we aborted when the motor wouldn't run. Basically we can't make a motor on its third season run more than occasionally. I'm going to take the carb off the old tohatsu with the ruined lower unit and try to make it to the marina to pull out for the season. AAAGH!
Last edited by Orca; 09-24-2017 at 02:40 PM.
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