'46 evinrude sportsman carburetor service

[todd281]

I recently came into this little outboard ,and the carburetor needed service it was full of gunk . I opened it up and cleaned the bowls [had to make a new cork float] This is my first time with this type of carburetor, any special "look for" details? I am assuming that the included poppet valve [#200,846] serves the normal function of intake reed valves in other engines. Does the pin below it [#160,219] only function to open that valve for starting? What is the "turns out" setting for the needle, and how does one set the cam that moves the "primer lever"[#102,018]

 

[Scott Danforth]

make sure you clean out all passages in the carb as well.

 

[lindy46]

My '47 Sportsman runs best with the needle turned out only about 1/8 to 1/4 turn. Once you get it running properly, set the lever straight up. Now adjust the primer lever to push the pin down on top of the float bowl when you turn the needle lever to the left. Prime cold motor for about 8 seconds - any longer and gas will run out the top of the float bowl. Here's some info on the carb from the owner's manual:
"The check valve lift is 1/8" and should not be changed. Valve should always be free on the pilot pin. Should dirt get lodged between the valve stem and pin, this may cause valve to stick or hold open. In this case, it is necessary to remove and clean the valve stem hole.It is easy to determine whether valve is functioning properly for it should produce a sound every time it drops into valve seat, as flywheel is revolved. When priming carburetor, the valve is raised off the seat by the primer pin at the same time the float needle is depressed, flooding the float chamber.This produces a liberal flow of fuel through the feed hole in carburetor seat for starting a cold motor only".

 

[F_R]

Notice the last sentence. There is a small hole in the valve seat that the fuel flows through when the valve lifts. Important that this hole / passage be clear.

 

[Crosbyman]

bible..
http://162.144.28.33/lib/johnson/manuals/1922-1964johnson.html#/0
http://162.144.28.33/lib/johnson/manuals/1922-1964johnson.html#/94

 

[Crosbyman]

looks a bit like a tn27 carb

read up on poche family site

http://pochefamily.org/outboard/CarbService.html

 

[todd281]

First place I looked was in the "big red book" but I could not find this carburetor in there. I will re-post the picture I found of it a bit bigger here . I will get back to this motor tomorrow and check that "small hole" that F_R posted about. hopefully get it up and running again.

 

[Crosbyman]

the hole is under the screen on the side of the check valve under the conical inlet needle if you pull the screen you will see the inlet to the check valve...if this is what FR is referring to

see photo POCHE family link showing the dirty check valve screen
and if you don't see a screen it is stuck inside the cavity where I found mine

 

[todd281]

I believe he is referring to the passage port that is under the poppet type valve [# 200846] of the carburetor. It appears to go from the float bowl , past the needle valve, and on to the valve seat of the other bowl/chamber. I removed the carb this morning and checked it by blowing some carburetor cleaner through it . All seems well. re-assembled and will try running it this afternoon[weather permitting]

 

[todd281]

Success ... I had to remove the float needle and re-clean it, then polish the seat using a little dab of valve grinding compound but all is good started on the first pull.

 

[F_R]

Odd that this thing could be confused with a Johnson TN. Well I guess a carb is a carb. Sometimes.

 

[Crosbyman]

no confusion... I wrote...... looks like as in resembles

 

[lindy46]

Success ... I had to remove the float needle and re-clean it, then polish the seat using a little dab of valve grinding compound but all is good started on the first pull.

They are good running motors. My '47 usually starts with 1 or 2 pulls.

 

[todd281]

I'll be on the lookout for some parts to finish it . lower covers, maybe a recoil starter, paint and decals .I thought I saw one on another site that was just high polished, might do that . For now , It runs, so I feel OK putting a little more time into it. Thanks again for all the help.