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Discussion Starter · #1 ·
I have been searching high and low for the correct (3JN-85540-00-00) CDI module. I have ordered TWO off ebay for over $200 each and they show up being the wrong CDI module.

My question is this. Is there an after market CDI Unit that will work on this beast? Do I need to replace other items if I get a performance module?

Any help is appreciated.
 

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Discussion Starter · #3 · (Edited)
what beast?

year, make, model please and I may be able to help you out.

at over $200, why not just buy oem?
It's a 1989 Yamaha pro-hauler. They made them for one or two years. The CDI module seems to be the issue for sure. They don't make them any more and all parts are used if you can find them.

I would not mind OEM, but I can't find anything to replace that model number.

Do you have options?
 

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Discussion Starter · #5 ·
Ok,so here is where I am at.

I have the correct CDI unit!!!! YAY!!!!
It still won't start because it is not getting fuel... BOO....
The petcock is clean..... YAY!!!!
But the carb is not sucking up the fuel.... BOO...
Where does the vacuum line going to the carb need to be plugged in?
 

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Discussion Starter · #7 ·
Brand new carb, but I can do that. 250. There is a vacuum tube that is on the carb, but not hooked up. Is that normal?
 

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Discussion Starter · #11 ·
Oh here we go....

3740


This is the vacuum line I think. When I get sucktion on it, gas gets pulled into the carb.

Thoughts? Am I missing a part?
 

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View attachment 3739

I think this is the over flow. At least according to diagrams I have seen.
This is your drain hoe to drain the bowl. the drain bolt is on the other side.

Oh here we go....

View attachment 3740

This is the vacuum line I think. When I get sucktion on it, gas gets pulled into the carb.

Thoughts? Am I missing a part?
This is your overflow.
if the float is not set properly and too much fuel is in the bowl, it will leak out of this tube, hence why you are getting fuel out if you suck it out that hose. you will also get fuel into the engine if you blow into it.

These carbs don't have vacuum hoses.

if your engine is not getting fuel, (if you are removing the spark plug and its dry)
check if the plug comes out dry if you use choke.
if still dry, you need to check your valves/timing
 

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Discussion Starter · #14 ·
Valves and timing, got it. I will check the plug first. Thank you a ton. I will let you know what I find!
 

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About a tablespoon is all ya need Boss, let us know what happens. If she runs, then stalls, we know it's a fuel delivery problem.
 

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If memory serves me correctly, ( I haven't viewed the service manual) so dont quote me....I believe the tube on top that you were concerned about was originally routed to the gas tank cap.
 
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