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Bf Honda 25 hp

Brandon6901

New member
So I am a tech at a marina and do small service repairs and our head mechanic has got fired he has the carbs tore apart on a 25 and I’ve rebuilt the older Honda carbs before no problem and have never seen these lines on them before but I believe this is a 2018 and it has a bunch of vaccum lines I’m assuming on them and am trying to find a diagram for them and we don’t have a service manual for 25 hp so I figured I would reach out for some help thanks guys I hope y’all have a great day
 
Hi,
Are you talking about this tubing?

https://www.boats.net/catalog/honda...bf25dk3-lrta-2007-and-later/carburetor-tubing

This is probably the best depiction of how those are arranged that you're going to find. I don't think that the shop manual would have anything better although I don't have one for reference since I don't work on these.

There's a bit more on this page:

https://www.boats.net/catalog/honda...p/bf25dk3-lrta-2007-and-later/carburetor-assy

Hopefully those will help you some.

It's always tough to have to "pick up" someone else's job after it's been torn apart.

I feel your pain.
 
I hate this auto choke system for this very issue. It's a plumber's nightmare. Worse, it has to be just right to work. All of the vent lines need to have a very distinct "rise" in the way they are routed prior to running down to the tee. Do not attempt to get creative here. Without that rise, fuel is going to flow into the vent hose making the motor act like one of the float bowls is over flowing when it's not. Learned this lesson the hard way, so it's not likely I'll ever forget it.

Vent hoses are marked 1,2, and 4 in this diagram:
https://www.boats.net/catalog/honda...bf25dk3-lrta-2007-and-later/carburetor-tubing
 
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