Need Carb Part Number Please

[acolic]

Hi

I was rebuilding the carbs for an Evinrude 1977 75743s and while taking off a brass piece that goes straight through the carb body it snapped. It’s a brass piece with another brass piece within it.

I can’t find the parts in this diagram.

https://www.crowleymarine.com/johnson-evinrude/parts/40905.cfm

I guess I can use the carbs off a 1977 70773S but I would rather replace the brass parts.

Appreciate the help.

Sent from my iPhone using Tapatalk

 

[Riverbean]

They dont sell them that im aware of.. Why were you removing the nozzle?? Can clean it with it in...
Youll have to buy a carb online somewhere and either use the whole carb or take the nozzle off it.
Theres prob quite a few year models that have that same nozzle in them so your not stuck trying to buy that exact carb.

 

[RaisedByWolves]

Yeah, that is part of the carb body and is generally not removed as you now know.

 

[acolic]

My lesson if the day.

Got a bit too enthusiastic.

Luckily I have 3 others.


Sent from my iPhone using Tapatalk

 

[acolic]

So I popped on 3 carbs from a 1977 70773s and the motor took off like wild.

The idle was way too fast.

I compared the carb parts from a 70hp and a 75HP and only one part is different.

Part #33 Orfice Plug.

Any idea what it does and why it is different between a 1977 70Hp and a 75 HP?

Thanks

https://www.crowleymarine.com/johnson-evinrude/parts/40905.cfm?mdl=PG7MPZ

 

[nccatfisher]

Forget the orfice and set the idle to your engine.

 

[Riverbean]

Ebay does have some nos nozzles but not for all models...check there

 

[acolic]

Forget the orfice and set the idle to your engine.

Hi

Any idea how to set the idle on an Evinrude 1977 70773S.

The shop manual I have walks you through rebuilding the motor but surprisingly has nothing on setting idle speed.

Thanks for the help.


Sent from my iPhone using Tapatalk

 

[kofkorn]

There's a Link & Sync process to go through if you have a true OEM shop manual that will cover the idle adjustment, but for simple idle adjustment, you need to tweak this screw:



Good luck!