1999 Johnson 200 Low Power

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J200pxeen is my model number

the motor feels under powered takes for ever to get on plane I thought it was a vro issue since I premix i got a double pulser pump. Replace the pulse limiter and rebuilt the carbs and cleaned with carb cleaner and compressed air. Still not getting the right power. I have a Holley electric low pressure pump 38gph and 4-7 psi. Checked while running with a gauge and I’m only getting 2-4psi under load. I have a 5gallon tank I’m using for testing so I know my internal tank is not a factor here.
im thinking reed valves?

 

[racerone]

What boat is it on ?----What pitch is the prop ?----Has the boat been weighed ?------Do you have spark on all six leads ?----What are the compression numbers ?----Did this " under powered " condition develop suddenly ?---And there are more things to look at too.

 

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It’s on a 19ft cc seahawk 1990 claims to be 2,000lb I think more like 3,000 plus motor and 50gallon tank
prop is 13/34x 17in pitch
compresion is 100 on all 6 cylinders
I purchased the motor saw it run didn’t test it in the water now I’m paying extra

 

[Faztbullet]

Tis not the reeds....

 

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I pulled of the carb throttle plates and on the center reed box I found a rotted out rubber nipple looks like vacuum?

im going to pull the reeds out take a better look because if I tap my finger on them the feel loose on 4 of the cylinders. By loose I mean the reed valves don’t feel like they are tightly mounted. Like the screws on the base are backing out

 

[Faztbullet]

FYI.. have seen the ethanol in fuel crack and delaminate the rubber coating on reed blocks but this causes idle problems and lean blow back thru carbs...

 

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What do you mean by lean blow back and thanks for the response

 

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2 cylinders runs the same if I cover them up

J200pxeen

when I’m running around 4500rpm I noticed if I put my hand over the 1st and 3rd cylinder carbs the motor does not respond. If I do the same thing to the other carbs the motor almost dies. Due to this I believe motor has lost power. Top speed was around 55 now it struggles to hit 30. Wot rpms 5300 should be over 6000

compression test 120 all cylinders with 2 difrent guages
spark gap test jumped 3/8inch
fuel pressure goes from 6-2psi
my r

 

[racerone]

From the boat side and looking at the carburetors which carburetor are you is considering the #1 carburetor.----Are the orange wires from the powerpack hooked up correctly ?-----Orange / blue stripe to the top cylinder ?

 

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Yeah I have check the power pack wires for breaks or issues
starboard side 1st and 2nd down from the top. Or cylinders 1 and 3

 

[racerone]

Are you 100% sure that the top carburetor on the starboard side feed the cylinders on the starboard side ?----Or do they crossover ?

 

[GA_Boater]

Combined your reed post and carb post into one thread. It's the same problem in both threads, so no need for a second and divergent thread with unrelated advice.

In other words - The motor runs like crap, let us help you find out why!

 

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Thanks for combining. I am not sure that the carb in the location I decribe is as u say. But the 2 I am speaking of are on the top left in this picture

 

[racerone]

Fact ---the carburetors cross over.---------The top carburetor on the PORT side feeds the top cylinder on the STARBOARD side.----Check the orange wires ( stripe color ) from powerpack to coils.----Have you looked at possible issues with crankshaft SEALING RINGS on the motor.-----Sealing rings on the crankshaft, not the same as the top and bottom rubber oil seals.

 

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Just cleaned all contacts for the primary coils from power pack now wot 3500 rpm

 

[racerone]

I am asking if the ORANGE WIRES have the correct color stripes !----Is the orange / blue on the top cylinders , yes , no or not sure why that is important ??

 

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I have not thought to check crank and rings. Would you please explain how I would. Please by all means understand I know almost nothing about outboards but I know how to trouble on a basic level so I really appreciate the input thank you

 

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Could you explain how I could check the sealing ring on the crankshaft please. Thank you for the help

 

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How would I check the crank seals that your speaking of? Thanks for the help

 

[racerone]

Checked the orange wires ?----Or are you not sure why it is important ?