115 Johnson 1978 reed valves

[1983 ercoa 21']

Reed valves on a 115 Johnson cross flow.
is the different stages of reed valves to better enhance performance of low,mid or high rpms

 

[jimmbo]

Re: 115 Johnson 1978 reed valves

Stock reeds are single stage. There are some aftermarket ones, that are like Reed on Reed, usually Fiberglass. Whether or not they make a difference is debatable. Some people swear they do, others, like me, say the difference is imagined or not noticeable.

 

[emdsapmgr]

Re: 115 Johnson 1978 reed valves

Composite reeds will provide somewhat better idling and mid-range pickup. Depending on your engine, it might give you an increase of a few hundred rpm's at WOT. Usually, factory metal reeds perform very well over the life of a normal consumer engine. If you run it a lot at high rpm's, (racing conditions) it does stress the metal reeds long-term. If a metal reed cracks/breaks, it will usually damage the powerhead. Not likely if a composite reed ever breaks.