Yamaha 40plrr throttle cable/CDi

[40plrr]

Hi everyone, I really need help.

I have a 1993 Yamaha 40PLRR.

When I move move the throttle, (the cable pulls away from the engine), it doesn't make the CDI needle move. However, the carbs engage properly.

I thought that maybe the cable needed to push towards the motor. I bought the part to reverse the cable and make it push into the engine.

Well, that didn't work either. It would engage the cdi but then the carbs would still be sitting at idle. And it wouldnt open them up.

I'm going absolutely insane. None of this makes sense.

Does anyone know what the problem is?

 

[40plrr]

 

[40plrr]

This shows the current set up. The throttle pulls from the motor. Carbs engage, but the CDI does nothing.

The cdi is sitting at idle. According to my book, it should have moved down to the middle notch on the CDI box

This is with the throttle pushed wide open at the yamaha 703 box

 

[40plrr]

 

[40plrr]

This piece is spring loaded. It is supposed to move upwards, causing the linkage to adjust the CDI needle to move down.

That piece is not moving when throttle is engaged. Why?

It's currently sitting on the idle rest screw. When it moves up, it should hit the WOT stop screw that is directly above it. It's not moving.

 

[40plrr]

 

[40plrr]

Ok now,
If I reverse the throttle cable ( Circled in blue) and make it push the throttle cable into the motor (instead of pull away from)
The CDI (white) engages and moves properly.

However the carbs (Red) are not engaged at all. So the cdi thinks we are WOT but the carbs are sitting at idle

What in the magic trick is going on here?

 

[40plrr]

I also.made a short video.

 

[99yam40]

did you have that linkage all apart?
it does not look the same as my C40TLRX
there is a large cam that hits the roller on the carb linkages to open those as the cable moves.
might see if you can find a service manual for your motor to see if that has any info

 

[wmgeorge]

Hi everyone, I really need help.

I have a 1993 Yamaha 40PLRR.

When I move move the throttle, (the cable pulls away from the engine), it doesn't make the CDI needle move. However, the carbs engage properly.

I thought that maybe the cable needed to push towards the motor. I bought the part to reverse the cable and make it push into the engine.

Well, that didn't work either. It would engage the cdi but then the carbs would still be sitting at idle. And it wouldnt open them up.

I'm going absolutely insane. None of this makes sense.

Does anyone know what the problem is?

Is this a new to you engine, how did it run the last 30 years screwed up?

 

[40plrr]

Is this a new to you engine, how did it run the last 30 years screwed up?

It's a new to me engine. I don't know what happened in the last 30 years, but I can assure you it's running wrong now.

I was given an old pontoon. I had to restore it from the frame up. The only thing standing between me and a rocking summer is this issue.

Judging by the way it was when I got it, someone was a really bad mechanic. I don't know if a part was broken and replaced with the wrong one. Or what's going on. Everything is there compared to an exploded parts diagram

 

[40plrr]

did you have that linkage all apart?
it does not look the same as my C40TLRX
there is a large cam that hits the roller on the carb linkages to open those as the cable moves.
might see if you can find a service manual for your motor to see if that has any info

I have the service manual. I re linked and synced the motor per the yamaha book.

Its incorrect. Something is wrong.

Could you please reply with a picture of yours so that I can compare them? Maybe they're similar

The only thing I disassembled was the throttle cable so that I could show what was happening in the video

 

[wmgeorge]

I have the service manual. I re linked and synced the motor per the yamaha book.

Its incorrect. Something is wrong.

The other guy who replied is an expert on Yamaha so he can help.

Yup I spent two months this spring rebuilding and fixing a decent pontoon so I know the drill. Then I had to bring it back in and replace the water pump on the 40 Hp Yamaha 2007 model, but its working fine now. Good luck.

 

[40plrr]

The other guy who replied is an expert on Yamaha so he can help.

Yup I spent two months this spring rebuilding and fixing a decent pontoon so I know the drill. Then I had to bring it back in and replace the water pump on the 40 Hp Yamaha 2007 model, but its working fine now. Good luck.

Thank you

 

[wmgeorge]

Thank you

Here is a Link to a Parts List and they also show a service manual, is it the same as you have? https://www.crowleymarine.com/yamaha/oem-parts/outboard/1993/40plrr

 

[40plrr]

Here is a Link to a Parts List and they also show a service manual, is it the same as you have? https://www.crowleymarine.com/yamaha/oem-parts/outboard/1993/40plrr

Yes sir. I've looking at that exact site for weeks. I'm staring to wonder if I don't have this part # and its missing. Its hard to research such an old boat motor with the internet.

The weird part is, its only showing up under the 40M motor and not the 40plrr. Im so confused

[COLOR=rgba(0, 0, 0, 0.95)]6H4-41633-01-00
Lever magneto Control[/COLOR]

 

[99yam40]

Here is a pic I took of my manual of the CDI,
not the same set up as yours
mine is 1999 and does not have linkage to timing plate like yours
just to the CDI which controls timing changes

I can take a pic of mine tomorrow if you really want

 

[40plrr]

Here is a pic I took of my manual of the CDI,
not the same set up as yours
mine is 1999 and does not have linkage to timing plate like yours
just to the CDI which controls timing changes

I can take a pic of mine tomorrow if you really want

I have looked at that before and the needle is backwards.

Ita not the same cdi. The issue is, if the cdi engages, the carbs won't.

Or if the carbs engage, the cdi wont

 

[99yam40]

did it ever work properly

if so ,something has happened to change that

 

[40plrr]

did it ever work properly

if so ,something has happened to change that

Not since I've had it.

Someone had adjusted the carbs and set the idle super high. Itnwoukd slam into gear.

I re linked and synced it.

Re set the carbs and idle speed.