SailNet Community - Reply to Topic

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance > Engines > Outboard > Nissan / Tohatsu 6h 4 stroke
 Not a Member? 


Thread: Nissan / Tohatsu 6h 4 stroke Reply to Thread
Title:
  

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

Message:
Trackback:
Send Trackbacks to (Separate multiple URLs with spaces) :
Post Icons
You may choose an icon for your message from the following list:
 

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:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Click here to view the posting rules you are bound to when clicking the
'Submit Reply' button below


Additional Options
Miscellaneous Options

Click here to view the posting rules you are bound to when clicking the
'Submit Reply' button below


Topic Review (Newest First)
01-31-2014 07:53 PM
dabnis
Re: Nissan / Tohatsu 6h 4 stroke

Quote:

Quote:
Originally Posted by christian.hess View Post
did you read the link I put a few pages back

its can be used as refference for other johnson motors

my last johsnon was a 6hp longhshaft...

just keep the exhaust fumes flowing and make sure it doesnt suck up the fumes...as it will overheat and depower...

there is a mod to the engine cover I fiorget what it was for the 6 but on other motors it includes making a vent to route clean air in and dirty fumes out

cheers
Quote:
Some years back I converted one of my outboards to long shaft. There are lots of OMC parts shops on the web. IIRC, all I needed was a drive shaft, water pick up tube, shift rod extension, maybe a new rod?, and the lower leg spacer. My guess is that all the parts could be had for $100?

Good point on the ventilation issue . On our Coronado 25 we had to keep the cover wide open all the time or it would load up. I drilled some small holes near the top of the cowling which seemed to help.

Paul T
Forgot this, the most difficult part of the conversion was re-installing the power head end of the water pick up tube. There is an o ring that fits into a recess in the block, it kept falling out. Finally put some gasket seal on it, let it dry for a while and stuck it into the recess.

What I should have done was to turn the motor upside down, it would have also been much, much easier to see what I was doing, Duh!! My wife says that at times I get "overly focused".

Paul T
01-31-2014 04:52 PM
ericb760
Re: Nissan / Tohatsu 6h 4 stroke

The mods have approved an Outboard Mintenance sticky. Please come check it out, especially those of you with extensive outboard knowledge!
01-31-2014 11:46 AM
dabnis
Re: Nissan / Tohatsu 6h 4 stroke

Quote:
Originally Posted by christian.hess View Post
did you read the link I put a few pages back

its can be used as refference for other johnson motors

my last johsnon was a 6hp longhshaft...

just keep the exhaust fumes flowing and make sure it doesnt suck up the fumes...as it will overheat and depower...

there is a mod to the engine cover I fiorget what it was for the 6 but on other motors it includes making a vent to route clean air in and dirty fumes out

cheers
Some years back I converted one of my outboards to long shaft. There are lots of OMC parts shops on the web. IIRC, all I needed was a drive shaft, water pick up tube, shift rod extension, maybe a new rod?, and the lower leg spacer. My guess is that all the parts could be had for $100?

Good point on the ventilation issue . On our Coronado 25 we had to keep the cover wide open all the time or it would load up. I drilled some small holes near the top of the cowling which seemed to help.

Paul T
01-31-2014 10:23 AM
christian.hess
Re: Nissan / Tohatsu 6h 4 stroke

Quote:
Originally Posted by Lou452 View Post
Your only limits will be time, money, skill and desire. Take it over if you feel the need.
Let us know how it goes, success or not. All of life is a learning process. If you share we will learn. Well maybe we will
best wishes , Lou
did you read the link I put a few pages back

its can be used as refference for other johnson motors

my last johsnon was a 6hp longhshaft...

just keep the exhaust fumes flowing and make sure it doesnt suck up the fumes...as it will overheat and depower...

there is a mod to the engine cover I fiorget what it was for the 6 but on other motors it includes making a vent to route clean air in and dirty fumes out

cheers
01-31-2014 12:41 AM
ericb760
Re: Nissan / Tohatsu 6h 4 stroke

Quote:
Originally Posted by Lou452 View Post
Your only limits will be time, money, skill and desire. Take it over if you feel the need.
Let us know how it goes, success or not. All of life is a learning process. If you share we will learn. Well maybe we will
best wishes , Lou
You sound like my dad when I asked him for seed money to start a mobile DJ service in my teens.
01-31-2014 12:06 AM
Lou452
Re: Nissan / Tohatsu 6h 4 stroke

Quote:
Originally Posted by ericb760 View Post
A bit OT, but, since it seems that this thread is still being read, and my request to start an outboard sticky is being reviewed by the mods, I'll ask it here. I have a 1976 Evinrude 6hp Short Shaft. I have the opportunity to purchase a 1974 Johnson 6hp Long Shaft advertised for sale for "parts" (it turns but will not start). Seller wants $100. Based on what is available research wise, it would seem that I could make my short shaft in to a long shaft if I cannibalize it. Or, I could diagnose whatever the problem is, repair it, and then have two outboards. Which would be optimal for my dinghy. Advice? Yes? No? Is there a flaw in my carefully planned takeover of the 6hp used outboard market in SoCal?
Your only limits will be time, money, skill and desire. Take it over if you feel the need.
Let us know how it goes, success or not. All of life is a learning process. If you share we will learn. Well maybe we will
best wishes , Lou
01-31-2014 12:00 AM
Crazy
Re: Nissan / Tohatsu 6h 4 stroke

I have a '71 long shaft Johnson 6hp and have been doing research. There is enough info on the 'net that one could rebuild these motors top to bottom. I can't answer your question because it depends on the condition of this 2nd motor. How the bearings? Races? Gears?
I have read a case in which a guy built up the transom of his boat (an aluminum utility) in order to use a long shaft OB. Absolutely necessary? Idk...
01-30-2014 11:18 PM
ericb760
Re: Nissan / Tohatsu 6h 4 stroke

A bit OT, but, since it seems that this thread is still being read, and my request to start an outboard sticky is being reviewed by the mods, I'll ask it here. I have a 1976 Evinrude 6hp Short Shaft. I have the opportunity to purchase a 1974 Johnson 6hp Long Shaft advertised for sale for "parts" (it turns but will not start). Seller wants $100. Based on what is available research wise, it would seem that I could make my short shaft in to a long shaft if I cannibalize it. Or, I could diagnose whatever the problem is, repair it, and then have two outboards. Which would be optimal for my dinghy. Advice? Yes? No? Is there a flaw in my carefully planned takeover of the 6hp used outboard market in SoCal?
01-30-2014 05:12 PM
TohatsuGuru
Re: Nissan / Tohatsu 6h 4 stroke

Why did have to look at this thread? Years since I've looked at it and it's still the same BS
01-29-2014 11:57 AM
dabnis
Re: Nissan / Tohatsu 6h 4 stroke

Quote:
Originally Posted by christian.hess View Post
threads like this are just like threads on mc forums...not worth it

suffice it to say that not all engines are created equal...not all bikes or boats are created equal and not even the same jets in the same engine side by side are created equal

engines and carbs for for outboards and most bikes, are bench tested and sent from the factory according to emissions standards nowadays

if you think your engine is jetted perfectly from the factory for ease of starting...slow idle...wot etc...well you are wrong

again I STRESS that outboards and most engines are jetted for overall performance

certainly not for max performance anywhere

but thats the great thing...you jet for overall err SAFE

Im laughing at myself as I type this cause I would always err on the safe side on mc forums quoting that standard jetting was always better for overall performance give or take a few tweaks of the fuel mix screw or pilot jet or main depending on what and where your rode

in any case outboards do perform well with stock jetting for 99 percent of people

its that 1 percent that nags and wants more

I guess thats all I was trying to say

I understand that being an outboard tech now has more weight than what anyone else here says myself included...but based on past experience Im glad to say that reality is differnt from techincal fact...or THEORY if you will

life is that way also

just cause you have a 6hp outboard means squat when you can make a 4hp perform equally and more efficiently...

just sayin

dont shoot the messenger

notice the first thing I recomended was a nice 4 blade solas prop?

this would put the op on the rpm range he wants, if still not enough then he could tweak the jetting for example

but who cares now
Only speaking from my own experiences, to share with the OP. If he can gain anything from them, that is good. Agree on the motorcycle thing, changed a few carbs, Amal & Bing to Mikunis and jetting to suit altitude and various courses.

As Pvan1 mentioned, generally speaking, outboards are run pretty hard, maybe with the exception for trolling all day, followed by an hour WOT run home. Jetting is easy to do, but if you get it too lean, it can be costly.

My opinion, offered at no cost, and for what it is worth.

Paul T
This thread has more than 10 replies. Click here to review the whole thread.

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


All times are GMT -4. The time now is 01:55 AM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.