Thread: reed valves

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  1. #1
    Member
    Join Date
    Mar 2005
    Location
    Bulverde
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    68

    reed valves

    Rusty and friends. I'm the one with low rpm on the 94 200hp Johnson. (refer to "Rusty please help with rpm problem" on 9-28) I read in my shop manual that chipped, cracked or broken reed valves can cause the motor to run rough, pop, or backfire through the carb. stall during acceleration, and lose wide -open throttle speed. I have the rough running and the loss of top end speed. How can I tell if this is a possible problem. If it is, do you take the carbs off seperately or can you remove them on the intake manifold. Is this a difficult repair? Should I consider Boysen reeds if I attempt this? I have ordered 64 jets instead of 65's and am considering replacing the after market power pack also.

  2. Member
    Join Date
    Jun 2004
    Location
    Fayetteville Tn.
    Posts
    3,556
    #2

    Re: reed valves (mark b)

    When you pull the casbs, intake off, you can see the reeds... if there is a problem with the,, you will see daylight around the edges or cracks... as for the boysens...... if it lean sneezes a few times( and it will) then you'll be pulling it back down and fixing it again for missing/cracked reed... Not hard job to do, just very time consuming..I would personally start with replacing the pp and then see what it does..

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