Changing reed valves Outboard DIY Boyesen
This video will show you how I changed my reeds on my 2-stroke Mercury 25Hp outboard. This video is for visual purposes only. I’m not a professional mechanic, I just like to do my own repairs.
Changing reed valves on an outboard involves removing the intake manifold (and sometimes the carburetor) to access the reed block. Key steps include removing the old petals, cleaning the surfaces, and installing new reeds ensuring they seal perfectly against the reed block. Use new gaskets and ensure the reeds are properly aligned.
Symptoms of Bad Reed Valves
Hard starting or inconsistent idle.
Engine hesitation, poor acceleration, or sneezing.
Fuel blowing back out of the carburetor.
Tips
If the reed petal is cracked, chipped, or bent, it must be replaced.
On some older engines, replacing reeds may require splitting the crankcase.
Using aftermarket reeds can sometimes improve durability.
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