vapor separator tank 2008 Suzuki 115 - Pensacola Fishing Forum

Go Back   Pensacola Fishing Forum > Boating Topics > Boat Repair - Questions,Answers and Suggestions

Like Tree2Likes
  • 1 Post By Boat-Dude
  • 1 Post By X-Shark
Reply
 
Thread Tools Search this Thread Display Modes
Old 04-05-2019, 08:50 AM   #1
Green Eggs And Ham
Grand Slam
 
Boat-Dude's Avatar
 
Join Date: Sep 2011
Posts: 7,337
Lightbulb vapor separator tank 2008 Suzuki 115

I ended up replacing my (vapor separator tank) due to multiple issues. See below.

You can remove the VST with out removing the intake manifold. You can take it out thru the top.

1. Remove black plastic flywheel (1 screw) cover and the black plastic intake cover (2x 10mm bolts from the side) right above the VST.
2. Remove the top oil pressure sender, to give you room.
3. Facing the front of the motor, remove the left side lower engine cover.
4. Drain the VST from the bottom screw that has the drain tube below it.
5. Remove lower fuel line from VST to lower fuel rail.
6. Remove lower 10mm bolt for the VST, not that you can get to it.
7. Remove the high pressure fuel filter & hose (2 x 10mm bolts).
8. Remove all other fuel hoses and small vent tub from the top of the VST.
9. Unplug electrical connector from the top of the VST to the fuel pump.
10. Remove the last 2 10mm bolts from the VST (the top bolt with a 10mm wrench and the lower with a 10mm ratchet wrench.
11. Remove VST from top.

My high pressure pump was not able to keep 38psi on the fuel rail, you will see in the pictures that the high pressure pump bushing that seals the neck of the pump to the VST was swollen from ethanol use and was cracked. This was causing the fuel to leak past the fuel pump back into the VST hence losing fuel pressure, causing drop in speed and sluggish running. This would allow the fuel pressure to bleed off making it harder to restart the motor after sitting for some time.

In the other pic you will see the neck of the fuel pump has a check valve and retainer, there was a small piece of plastic that broke off (brittle) that would keep the black rubber check valve and white plastic retainer in the pump. Now with that broke the check valve and retainer would shoot up into the high pressure fuel filter and would not be able to hold 38psi in the fuel rail when the motor is shuts off, causing the pressure to bleed off making it harder to restart the motor after sitting for some time.

In the bottom of the float side of the VST is the pressure regulator which didn't look great being on the bottom, I had no way of testing it and didn't want to take a chance of it not working and having to take out the VST for the second time. So by the time you replace the pump and the pressure regulator, you might as well by the entire VST unit with all new stuff including needle and seat.

On a side note after talking with the Suzuki mechanic he informed me if you have ethanol damage to the inside of the VST coating (surface damage due to water..corrosion) it allows tiny tiny particles of aluminum to bypass the fuel pump screen into the pump causing the pump to fail over time. This added to my decisions to by a complete new VST unit.

I hope this helps anyone with this issue.


Thx to Sea-r-cy for instruction for taking it out the top.
Attached Thumbnails
vapor separator tank 2008 Suzuki 115-suzuki-115-jpg   vapor separator tank 2008 Suzuki 115-115df-hpfp-jpg   vapor separator tank 2008 Suzuki 115-fuel-pump-115-2-jpg   vapor separator tank 2008 Suzuki 115-fuel-pump-115-jpg  
murfpcola likes this.
__________________
https://www.pensacolafishingforum.com/signaturepics/sigpic17230_2.gif
Boat-Dude is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 04-10-2019, 05:38 PM   #2
Green Eggs And Ham
Grand Slam
 
Boat-Dude's Avatar
 
Join Date: Sep 2011
Posts: 7,337
Default

Took it out and ran it over 55 miles, good grief what a difference the new VST made. Only burned 10 gallons, so smooth and seems quieter, fired right up after sitting on a spot for an hour.
__________________
https://www.pensacolafishingforum.com/signaturepics/sigpic17230_2.gif
Boat-Dude is offline   Reply With Quote Quick reply to this message
Old 04-11-2019, 07:55 AM   #3
Senior Member
Blue Marlin
 
Join Date: Oct 2007
Location: Pensacola, Fl.
Posts: 5,529
Default

Boat-Dude likes this.
__________________
[ Marine - Doesn't your outboard deserve the BEST?
X-Shark is offline   Reply With Quote Quick reply to this message
Reply

Tags
suzuki 115, vapor separator tank, vst

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Pensacola Fishing Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
How Did You Find Us?
Tell us how you heard about Pensacola Fishing Forum.

Log-in



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
2008 Suzuki df 140 overheat issue Fish4jesus Boat Repair - Questions,Answers and Suggestions 2 06-24-2018 12:59 AM
2008 Carolina Skiff j16 with a 2013 Suzuki 4-stroke. The motor only has a 100 hours j prostreet78 Boats and Boat Parts For Sale 8 03-20-2018 09:21 AM
2008 Suzuki 750 pm80 Various Items For Sale. 1 11-12-2017 04:05 PM
2008 new Sea Fox 236DC 200 Suzuki - about to buy Fajah Boating and Fishing Tricks and Tips 3 04-25-2009 08:47 PM
2008 SUZUKI 25 HP 4 STROKE, BRAND NEW,CAUTION LIGHT COMING ON! fishinwhits Boat Repair - Questions,Answers and Suggestions 7 03-04-2008 09:59 PM



All times are GMT -4. The time now is 01:20 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 RC 2
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.