Honda 9.9

[ace pilot]

On 9.9 Honda I have a small clear plastic tube not connected to anything it seems

 

[William01]

Could be the carburetor drain tube, would hook up beside the tell tale discharge

 

[jgmo]

Hi, Welcome to the forum.

Those outboards have two, clear plastic, tubes on the starboard side of the engine.

One is the drain tube for the carburetor float chamber.

It connects to a nipple at the bottom of the chamber on one end and to the fitting on the starboard lower engine cover located next to the waterpump tell-tale fitting so that you can drain the float chamber into a container to inspect for water/contamination.

See item 21 in the link below you didn't specify year or model so I picked an 07 tiller with manual carb as an example. Older models may be different.

https://www.boats.net/catalog/honda/outboard/2007-and-later/9-9hp/bf9-9dk0-sha-vin-babj-1600001-to-babj-1699999/carburetor-manual

The other tube is a drain for the air intake sound muffler cover housing.
It attaches to a nipple at the bottom of the muffler cover, is then routed downward and exits the case below to keep any crankcase vent gasses from condensing and forming "puddles" of oil/water that could contaminate the incoming air into the carburetor. See item 9 in the link below.

https://www.boats.net/catalog/honda/outboard/2007-and-later/9-9hp/bf9-9dk0-sha-vin-babj-1600001-to-babj-1699999/muffler-cover

Hope this helps you and good luck.

 

[ace pilot]

Hi, Welcome to the forum.

Those outboards have two, clear plastic, tubes on the starboard side of the engine.

One is the drain tube for the carburetor float chamber.

It connects to a nipple at the bottom of the chamber on one end and to the fitting on the starboard lower engine cover located next to the waterpump tell-tale fitting so that you can drain the float chamber into a container to inspect for water/contamination.

See item 21 in the link below you didn't specify year or model so I picked an 07 tiller with manual carb as an example. Older models may be different.

https://www.boats.net/catalog/honda/outboard/2007-and-later/9-9hp/bf9-9dk0-sha-vin-babj-1600001-to-babj-1699999/carburetor-manual

The other tube is a drain for the air intake sound muffler cover housing.
It attaches to a nipple at the bottom of the muffler cover, is then routed downward and exits the case below to keep any crankcase vent gasses from condensing and forming "puddles" of oil/water that could contaminate the incoming air into the carburetor. See item 9 in the link below.

https://www.boats.net/catalog/honda/outboard/2007-and-later/9-9hp/bf9-9dk0-sha-vin-babj-1600001-to-babj-1699999/muffler-cover

Hope this helps you and good luck.

Thanks .mine is 9.9 bd

 

[jgmo]

Do you mean BF9.9D? If so, those examples I attached are appropriate for reference.
Good luck.