Nissan/Tohatsu M3.5A (3 hp) removing Prop problem - SailNet Community
 2Likes
  • 1 Post By danvon
  • 1 Post By contrarian
 
LinkBack Thread Tools
post #1 of 10 Old 01-09-2020 Thread Starter
Junior Member
 
Join Date: Jul 2014
Location: Texas
Posts: 22
Thanks: 2
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Nissan/Tohatsu M3.5A (3 hp) removing Prop problem

I have two friends. Each have motors that look similar. They seem to both be Tohatsu M3.5A outboards. One is branded Mercury and is pretty new, about 2005. The other is a Nissan older perhaps 1998.

They both had leaking gas tanks which I replaced. They both started and ran, but would not drive the boat. They both have plastic props.

I worked on the Mercury first. I pulled the cotter pin holding the prop, and I spun the prop right off. The shear pin was sheared and buried in the plastic internally. I replaced the shear pin, put the prop right back on. The motor started, ran and drove the 14 foot boat along at a good clip.


On the Nissan, I can't seem to get the prop off. I pulled the cotter pin, but when I spin the prop it doesn't seem to unscrew, but just spins on the shaft. Any ideas on how I can get it off with out cutting it off?

Thanks for your help. Regards Captain Tom
tbodine88 is offline  
Sponsored Links
Advertisement
 
post #2 of 10 Old 01-09-2020
Senior Member
 
contrarian's Avatar
 
Join Date: Sep 2011
Location: Florida Panhandle
Posts: 468
Thanks: 11
Thanked 34 Times in 32 Posts
Rep Power: 9
 
Re: Nissan/Tohatsu M3.5A (3 hp) removing Prop problem

Prop Puller.
contrarian is online now  
post #3 of 10 Old 01-09-2020
Senior Member
 
Join Date: Aug 2010
Location: The Bahamas
Posts: 4,136
Thanks: 3
Thanked 153 Times in 151 Posts
Rep Power: 10
 
Re: Nissan/Tohatsu M3.5A (3 hp) removing Prop problem

Put the motor in gear to learn if it is really spinning
As posted above, may need a puller
RegisteredUser is online now  
 
post #4 of 10 Old 01-09-2020
Senior Member
 
Join Date: Dec 2012
Location: Seattle, WA
Posts: 326
Thanks: 19
Thanked 16 Times in 16 Posts
Rep Power: 8
 
Re: Nissan/Tohatsu M3.5A (3 hp) removing Prop problem

If your motor is like mine, the prop would not screw on the shaft but would just press on over the shear pin. I wonder if your shear pin is broken on this one too and just enough is left sticking out to hold the prop? Have you tried prying between the prop and the impeller housing on the motor (big flat bar or screwdriver?)
eherlihy likes this.
danvon is online now  
post #5 of 10 Old 01-10-2020 Thread Starter
Junior Member
 
Join Date: Jul 2014
Location: Texas
Posts: 22
Thanks: 2
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Angry Re: Nissan/Tohatsu M3.5A (3 hp) removing Prop problem

Quote:
Originally Posted by contrarian View Post
Prop Puller.
Where and how do I apply it? The end is enclosed and not a separate screw out section as found on larger Propellers.

There is a picture here:

http://tommythegeek.com/~tbodine/toh...110_051642.jpg


Note that pulling straight off by hand has been ineffective so far
tbodine88 is offline  
post #6 of 10 Old 01-10-2020
Senior Member
 
Join Date: Feb 2010
Location: Narragansett Bay
Posts: 21,035
Thanks: 82
Thanked 591 Times in 567 Posts
Rep Power: 12
   
Re: Nissan/Tohatsu M3.5A (3 hp) removing Prop problem

How do you know it's spinning on the shaft and not with the shaft? Perhaps the shaft needs to be locked. You could put it in gear, but something more mechanical would be better than straining against the drive gears, unless it lets go easily.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Jeanneau 54DS

In the harsh marine environment, something is always in need of repair. Margaritas fix everything.
Minnewaska is offline  
post #7 of 10 Old 01-10-2020
Senior Member
 
contrarian's Avatar
 
Join Date: Sep 2011
Location: Florida Panhandle
Posts: 468
Thanks: 11
Thanked 34 Times in 32 Posts
Rep Power: 9
 
Re: Nissan/Tohatsu M3.5A (3 hp) removing Prop problem

You'll have to call Spanky on that one. I had a friend that needed to pull a steering wheel on his R.V., he had been working on it a couple of hours when I got there and we decided that he needed to take a break. While we were having a cold beer to re-group, Spanky (a mechanic ) pulled up. My friend told him what he was trying to do and Spanky stepped into the RV to take a look. Before we could finish the last swig of that cold beer, Spanky came back out of the RV with wheel in hand and big grin on his face.
Sometimes it's best to just call Spanky.
eherlihy likes this.
contrarian is online now  
post #8 of 10 Old 01-12-2020 Thread Starter
Junior Member
 
Join Date: Jul 2014
Location: Texas
Posts: 22
Thanks: 2
Thanked 0 Times in 0 Posts
Rep Power: 0
 
Smile Re: Nissan/Tohatsu M3.5A (3 hp) removing Prop problem

Spanky wasn't available.

I used a Mark 1 Hammer. Worked great:
http://tommythegeek.com/~tbodine/toh...112_065739.jpg

Think I'll replace the prop as well since I think the plastic gouged out by the bent shear pin was what kept the prop on.

Happy sailing ya'll
tbodine88 is offline  
post #9 of 10 Old 01-12-2020
Senior Member
 
contrarian's Avatar
 
Join Date: Sep 2011
Location: Florida Panhandle
Posts: 468
Thanks: 11
Thanked 34 Times in 32 Posts
Rep Power: 9
 
Re: Nissan/Tohatsu M3.5A (3 hp) removing Prop problem

Looks like you handled it the same way that Spanky would have. Sometimes it's hard for mere mortals to think like a mechanic. It is for me anyway. The two things that I have hated doing most of my life are mechanic work and plumbing. Owning a sailboat has made me re-evaluate the way that I look at both of these tasks. Now i'm able to tolerate them..... Sorta
Good on you fer gittin er dun. You would make Spanky proud. I can just picture that Ship Eating Grin on his face now!
contrarian is online now  
post #10 of 10 Old 01-12-2020
Learning the HARD way...
 
eherlihy's Avatar
 
Join Date: Jan 2007
Location: Boston / Ft Myers Area
Posts: 6,973
Thanks: 398
Thanked 302 Times in 297 Posts
Rep Power: 14
 
Re: Nissan/Tohatsu M3.5A (3 hp) removing Prop problem

The manual for that motor is available online somewhere. PM me with your email address and I can send it to you.

The solution is frequently to use a BFH.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

USCG Licensed OUPV Captain, US/Sailing BKB and ASA 101/103/104/105/106/114/118 Instructor - Also ABYC certified in Marine Electrical Systems,


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
eherlihy is online now  
Reply

Quick Reply
Message:
Options

By choosing to post the reply above you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome