What is the correct way to check reed valves on Merc 200HP

R

robalofish

Petty Officer 2nd Class

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• May 7, 2003

• #1

Can anyone tell me the correct way to check the reed valves on a 1994 200hp MERC carbureted engine.<br />1. Running at idle<br />2. warmed up <br />3. pull bleed hose.<br />4. plug in PSI guage.<br /><br />Im am only getting 1-2 psi with a lot of pulsation.<br /><br />Should all ports read the same.<br /><br />Book is not real clear on this.<br /><br />Any help would be appreciated. Thanks - Robalofish

 

Yepblaze

Lieutenant Commander

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Jun 1, 2001

Messages

1,686

• May 7, 2003

• #2

Re: What is the correct way to check reed valves on Merc 200HP

Lots of pulsation is correct. If the reeds are bad on any given cyl you will see very little or no pulsation at all.

 

R

robalofish

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• May 8, 2003

• #3

Re: What is the correct way to check reed valves on Merc 200HP

Is the 1-2 PSI ok and what about the speed?<br />Book indicates should be PSI should be higher.

 

R

robalofish

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• May 8, 2003

• #4

Re: What is the correct way to check reed valves on Merc 200HP

^^

 

Yepblaze

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• May 8, 2003

• #5

Re: What is the correct way to check reed valves on Merc 200HP

Perhaps the specs are for a static testing procedure.<br /><br />Or.... your testing device does not have the ability to acertain correct readings with the fast pos and neg pressures.<br /><br />What issue are you trying to diagnose?

 

R

robalofish

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• May 8, 2003

• #6

Re: What is the correct way to check reed valves on Merc 200HP

Hard starting cold with lots of smoke & poor idle, after it warms up easy to re-start still idles rough normal smoking.<br />May be nature of the engine I'm not sure.<br /><br />Thanks ..

 

R

robalofish

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• May 10, 2003

• #7

Re: What is the correct way to check reed valves on Merc 200HP

^

 

D

dkondelik

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643

• May 10, 2003

• #8

Re: What is the correct way to check reed valves on Merc 200HP

'mornin' robalofish,<br /><br />your symptoms can cover a lot of problems. have you checked/comfirmed your cylinder compression? i've seen similar problems on motors with broken rings & scored cylinders.<br /><br />how do your reeds look? chipped? broken? bent?<br /><br />is she tough to start? will she idle?

 

R

robalofish

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• May 11, 2003

• #9

Re: What is the correct way to check reed valves on Merc 200HP

Compression 120-124 all 6<br />Starts hard must be sloppy wet<br />Once started and warmed up idles - just rough like a washing machine.<br /><br />Runs great good top end 5500-5600.<br /><br />Haven't looked at the reeds didn't want to fix something that might not be broken.<br /><br />I only did the Merc manuals test for the reeds - they said 5-6 PSI I was only seeing 2-3 PSI.<br /><br />Thought I may have been doing something wrong.<br /><br />Thanks

 

R

robalofish

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• May 15, 2003

• #10

Re: What is the correct way to check reed valves on Merc 200HP

^^

 

H

Hooty

Rear Admiral

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Oct 2, 2001

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4,496

• May 15, 2003

• #11

Re: What is the correct way to check reed valves on Merc 200HP

Blowing fuel out the carburetors are the usual indication of broken / leaking reeds.<br /><br />c/6<br /><br />Hooty