yamaha outboard

[jan joyce]

How do we sync the carbs on a 4 stroke yamaha 2004 50 hp outboard? #4 carb is new and runs higher than other 3 carbs. Thanks.

[99yam40]

did you not understand the response to the last thread you posted?

[jan joyce]

jan joyce

I did not find the response. Would you explain again? Thank you.

[rodbolt17]

it takes a 4 channel manometer and the service guide.

[99yam40]

here is your original thread that had the answer you said you would try and let us know, but you never came back and posted anything
http://www.yamahaoutboardparts.com/f...d-th28809.html


do you have the tools/equipment to even try to do it properly?

[jan joyce]

2004 yamaha 50 hp 4 stroke

Thanks for the reply. Sorry for delay in reply. We still need your help.
The #4 cylinger (with a new carb) still misfires. It is a 2004 Yamaha 4 stroke 50 hp motor.
Has new #4 carb, new gas line, no water in gas and new gas, compression checked 2 times and all even at 150 psi; swapped coils 3 times, checked and no vacuum leaks, fuel pressure running at 4 psi. Model no. is T50TLRC.

Is there a history of common symptoms/problems for this particular engine lsuch as sticky values?

What do you recommend we do?

Also, what should the psi for fuel pump be? Thank you.

[boscoe99]

"What do you recommend we do?"

Take the motor to a Yamaha mechanic. Seriously. I am not being flippant.

[jan joyce]

Thank you for your reply.

What should the psi for fuel pump be?

We do have the manual and manometer and as I wrote have checked and fixed a number of things and we will take it to a Yamaha mechanic.

However, e have worked on this so much that we would like to know, if possible, what other things might be the culprit.

Also, I would like to know if you are aware of any history of problems the model T50TLRC 2004 50 4 stroke yamaha has had? For example, sometimes certain models may have a problem with sticky values.