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2001 Honda BF90a carberator

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briandash81

New member
So. What's the difference from carbs 1,2,3 from carb assy 4? I have fuel coming from the overflow tube on the bottom carberator. I look and see the adjustment screw is broke off. Also.theres another adjustment at the bottom that doesn't match the top 3 adjustment screws. I look online to replace Carb 4 and it's been discontinued?! What can I do?
 
Hi,
I don't have any experience with the 90 A outboards so I'm only guessing here.

Is this an outboard you just bought used?

The leaking fuel might just be a stuck float valve?? That can probably be an easy fix.

I think that the bottom carb idle set screw is different from the set screws on the other 3 carbs because of the position of the throttle cam. I think that they had to arrange it so that you can adjust it with all the linkage hooked up.

The set screws are available. See items 9 and 8 in the link:


Yes, sadly, that bottom carb is no longer available and racerone's suggestion of Ebay is where I would start looking too.

The problem is, most people that have used ones that they've salvaged from broken outboards will probably want to sell all four carbs together. So...more $$$

But, in my opinion, you can probably fix the one you have even if you've gotta use some epoxy.

Good luck.
 
Yeah I slept on it and watched some videos. I'm going to remove the manifold and clean the carbs replacing all the seals. Replace the emulsion tube's and jets. Hopefully this will fix the problem.
 
jgmo said:
Hi,
I don't have any experience with the 90 A outboards so I'm only guessing here.

Is this an outboard you just bought used?

The leaking fuel might just be a stuck float valve?? That can probably be an easy fix.

I think that the bottom carb idle set screw is different from the set screws on the other 3 carbs because of the position of the throttle cam. I think that they had to arrange it so that you can adjust it with all the linkage hooked up.

The set screws are available. See items 9 and 8 in the link:


Yes, sadly, that bottom carb is no longer available and racerone's suggestion of Ebay is where I would start looking too.

The problem is, most people that have used ones that they've salvaged from broken outboards will probably want to sell all four carbs together. So...more $$$

But, in my opinion, you can probably fix the one you have even if you've gotta use some epoxy.

Good luck.

The broken adjustment screw and mismatch between carb adjustments can cause overflow. Since Carb 4 is discontinued, consider replacing it with a compatible alternative or having it rebuilt. A professional carb service might be your best bet to resolve this. If you're writing a technical piece on carburetor repairs or need assistance, DoMyPaper which is an essay writing service can help you get a polished paper with clear instructions and recommendations. The platform https://domypaper.com/ aims to help students struggling with academic deadlines by offering professional writing assistance. It covers various subjects and ensures plagiarism-free content for every order.
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Link still working? It is not working for me.
 
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