SoCal Jet Boats

Tech Talk => Engine Mechanical / Electrical => Topic started by: Steveo909 on February 19, 2017, 11:19:27 AM

Title: Quick question
Post by: Steveo909 on February 19, 2017, 11:19:27 AM

This might be a dumb question but is the vent tube from the spark arrester supposed to connect to something or does it just hang down in the bilge?


Sent from my iPhone using SoCal Jet Boats

Title: Re: Quick question
Post by: Brad @ SCJB on February 19, 2017, 11:21:01 AM

Usually it goes to your fuel pump.

Sent from my SM-G930V using SoCal Jet Boats mobile app (http://r.tapatalk.com/byo?rid=201)

Title: Re: Quick question
Post by: Steveo909 on February 19, 2017, 11:27:33 AM

Yep! Got it. Thanks


Sent from my iPhone using SoCal Jet Boats

Title: Re: Quick question
Post by: GT Jets on February 19, 2017, 12:14:06 PM

The vent tube is supposed to go to the back diaphragm on a marine mechanical fuel pump.

The theory is if the fuel pump fails, the secondary diaphragm pumps raw fuel up into the carburetor killing the engine, essentially shutting off the fuel flow.

GT

Sent from my SM-G900V using SoCal Jet Boats mobile app (http://r.tapatalk.com/byo?rid=201)

Title: Re: Quick question
Post by: seapat on February 19, 2017, 06:21:08 PM

If you do not  run the hose to the carb. Is it ok to just cap off the breather to the fuel pump. Always wondered what was attached to fuel pump

Title: Re: Quick question
Post by: GT Jets on February 19, 2017, 06:47:00 PM

Quote from: seapat on February 19, 2017, 06:21:08 PM

If you do not  run the hose to the carb. Is it ok to just cap off the breather to the fuel pump. Always wondered what was attached to fuel pump

Don't cap it. Why wouldn't you just run the damn hose?

Sent from my SM-G900V using SoCal Jet Boats mobile app (http://r.tapatalk.com/byo?rid=201)

Title: Re: Quick question
Post by: seapat on February 20, 2017, 01:35:20 AM

The boat has velocity inlet with air cleaner. There is nothing attached to fuel pump I never know what went there.

Title: Re: Quick question
Post by: GT Jets on February 20, 2017, 08:32:14 AM

Quote from: seapat on February 20, 2017, 01:35:20 AM

The boat has velocity inlet with air cleaner. There is nothing attached to fuel pump I never know what went there.

OIC...

Just leave it open. I mean you could install a bulkhead fitting in the stack, but I'd just leave the port on the pump open.

GT

Sent from my SM-G900V using SoCal Jet Boats mobile app (http://r.tapatalk.com/byo?rid=201)