Tohatsu 3.5HP L/U sound Question

[DamianJP]

Hey guys

I noticed on my Tohatsu 3.5HP,in neutral when the prop spins it makes no noise.
But when I put it into gear it makes a strange noise when I turn it by hand.

I don't think its noticable when I tested it in a test barrel, but then again I had the exhaust in my ear too. Heres a video.





Thanks,
DamianJP

PS: Yes I was calling it a Nissan before I found out it was a Tohatsu, I guess it really doesn't matter to much though.

 

[TOHATSU GURU]

Re: Tohatsu 3.5HP L/U sound Question

So, what's your question?

 

[DamianJP]

Re: Tohatsu 3.5HP L/U sound Question

Is it supposed to make that sound only when in gear?

It kind of sounds like the rubber impeller but wouldn't it make that sound in both neutral/ingear?



EDIT: I'm am sorry for wasting time/space on the board. I think it is the rubber impeller and the reason im hearing it only in gear is because when in neutral, the L/U shaft isn't hooked up to move the drive shaft. I bet if I put it in neutral and moved the flywheel by hand,I would hear that noise too. I 'feel' dumb right now :redface:



Thanks,
DamianJP

 

[TOHATSU GURU]

Re: Tohatsu 3.5HP L/U sound Question

That's an atypical squeak. Normally you wouldn't hear anything that loud. But, your probably correct that it is the impeller. I think I would put a new water pump kit into it.

 

[DamianJP]

Re: Tohatsu 3.5HP L/U sound Question

Hey Guru

Thanks for getting back to me quick. A water pump job is easier than digging in the L/U (well for me atleast). Also I see this kit on internetoutboards.com...

http://www.internetoutboards.com/partdetail.asp?id=113

I see no housing. Is it common to replace the housing too when you do everything else?


Thanks again,
DamianJP

 

[TOHATSU GURU]

Re: Tohatsu 3.5HP L/U sound Question

On Jap engines you don't normally replace the housing. The housing has an insert liner and the kit comes with a replacement insert.