My carb is obsolete.. Please help me repair/replace!

foste1cc

Cadet
Joined
Sep 25, 2024
Messages
27
I have a new-to-me Mercury 18hp 2cyl 2-stroke (I think a 1980'-1985') Serial N: 6414331
I bought this to use as a kicker for my 21' sterndrive, as it was only $200, and has electric start and a stator-rectifier system that was a requirement in my books.

I was told it sat for a few years, and it is pretty filthy, but was told it was running great when taken off the previous boat. So I'm currently in the process in of giving it a good cleaning/refurbishing. Already bought my water pump kit and new fuel filter, but now can't find a carb kit. After looking for a while, I read in a couple places that nothing is made for this carb anymore :(
The carb assembly is #:1384-8704A1
Carb Rebuild kit is #:1390-8676A13

I haven't taken it apart yet, but it HAS to be filthy, being with how bad the fuel filter and lines were. I believe there was one supplier that offered a kit, but it was over $100!!! Anyone know what my best bet is from saving this outboard as a giant paper weight? I always have liked rebuilding my carbs every 1-2 years for peace of mind. Am I screwed?? Are there any other carbs that I could replace this one with???

Thank you in advanced, everyone!
 

matt167

Rear Admiral
Joined
Sep 27, 2012
Messages
4,355
Boats dot net has it in stock part number 8153. I assume it’s probably pretty easy to get one if they have it. But if you want to. Any gaskets you might need can be made out of gasket paper pretty easily
 

airshot

Admiral
Joined
Jul 22, 2008
Messages
6,369
In my opinion, nothing beats a good factory rebuild kit, thoroughly cleaned carb and reset to factory specs. Always worked well for me ! Chinese copy carbs were always a disaster and rarely worked.
 

foste1cc

Cadet
Joined
Sep 25, 2024
Messages
27
Thanks. Ordered a kit from boats dot net for around ~$75 shipped :/ But I guess it's better than +$100 🤷‍♂️ And also my own fault for not doing my research on this outboard before purchasing.. I'll just make sure to always run fresh gas w/ stabilizer and a quality 2-stroke oil, in hopes that I can refrain from another rebuild for a few years.
Thanks for the help!
 

airshot

Admiral
Joined
Jul 22, 2008
Messages
6,369
If you do proper maintenance it will be a long time before another rebuild will be needed. Watch where you buy your fuel, often times the fuel you purchase has issues already. Busy fuel stations often get by without testing their fuel and replace the filters. Use a good stabilizer to keep fuel fresh. Be sure you have a good inline fuel filter but fore the fuel reaches the carbs. If you have the ability to run the carb dry...do that before letting it set for a long period of time. Best thing for any carbed engine is to run it frequently !
Motors that only get used a time or two thru the season are prone to more issues. Rebuilt my last carb 12 years back, no issues to this day.
 
Top