Carburetor Cleaning/Rebuildon 2013 Yamaha 20HP outboard 4-stroke.
Problem: The motor would not idle properly.
Diagnostic steps:
1. Pull cord with throttle wide open to clear any excess fuel
2. Pull cord with throttle cracked slightly while holding rag sprayed with starting fluid to the intake.
3. The motor started at that point and it was determined the problem it was having was lack of fuel (using the rag with fluid offered an alternative source of fuel).
4. Removed brass drain screw from side of carburetor, observed fuel running out indicating the bowl did have fuel supplied to it.
Diagnosis:
The carburetor did have fuel supplied to it but was failing to mix the fuel with the intake air due to a blockage inside the carburetor itself
Remedy: Remove and clean carburetor fuel passages.
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Post time: Jul-01-2017