In this video I cover how to inspect and clean a 2 Stroke 40HP Yamaha Outboard Carburetor without using an ultrasonic cleaner. Basically, I do a a disassembly and inspection and do a thorough cleaning of all the ports in the carburetor. Of special interest are the idle (low speed) and main jets. Yamaha carburetors are a bit different the your Johnson, Evinrude, Mercury carbs. They have a somewhat higher level of complexity, especially when it comes to the jets and the idle circuit. Even so, they can be cleaned without an ultrasonic cleaner. You can also use this video as a guide if you are going to rebuild your Yamaha Carburetors.
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A Quick disclaimer, I am not an outboard technician. I do however do my homework and consult with experts when necessary before doing much of the work I do on outboards. Last of all, I get a service manual on the outboards I work on and a thoroughly familiarize myself on the area I am going to work on.
00:00 Introduction
00:55 Same Engine, Different Carbs
01:38 Disassembly
02:05 Inspecting Gasket and Needle Valve
02:56 Removing Low Speed Jet
03:48 Removing High Speed Jet and Cap
04:54 Removing Top of Carburetor (Idle Circuit)
06:05 Cleaning Body of Carburetor and Ports
06:55 High Speed to Idle Fuel Port
09:00 Cleaning the Jets
10:47 Re-Assembling the Carburetor
12:39 Correct Float Height
14:32 Idle Needle Adjustment
#OutboardCarburetor
#Yamaha2Stroke
#YamahaCarburetor