SuzukiSavage.com - Stock Vac Petcock question

Welcome, Guest. Please Login or Register :: View Members

SuzukiSavage.com › General Category › Rubber Side Down! › Stock Vac Petcock question

(Moderators: verslagen1, Dave, Serowbot)

‹ Previous topic | Next topic ›

Pages: 1

Stock Vac Petcock question (Read 64 times)

PhantomII

Junior Member

Offline

SuzukiSavage.com
Rocks!

Posts: 96
Tampa, FL
Gender: male

Stock Vac Petcock question
08/27/13 at 07:00:46

Is the stock petcock some kind of fuel pump that works off the engines pulses? I have about 50 antique outboard motors mostly Evinrude and Johnson from the '50's and '60's some of them use a pressurized fuel tanks and the other have a engine mounted fuel pump, but all of them work off the engines pulses to pump the fuel, so is that what the petcock on our Savages do?

IP Logged

Dave

YaBB Moderator
ModSquad

Offline

SuzukiSavage.com
Rocks!

Posts: 18101
Camp Springs, Kentucky
Gender: male

Re: Stock Vac Petcock question
Reply #1 - 08/27/13 at 07:46:03

No....the petcock is not a pump.....it is a valve.

The engine vacuum pulls on a diaphragm and opens the valve that allows the fuel to flow by gravity. There is a tiny internal orifice that smooths out the pressure pulses of the engine intake and creates a smooth vacuum on the diaphragm.

When your float bowl is dry from storage....you use the PRIME function to open the valve and allow fuel to flow manually.

Someday I will be old......But not today!

IP Logged

PhantomII Junior Member Offline SuzukiSavage.com Rocks! Posts: 96 Tampa, FL Gender:	Re: Stock Vac Petcock question Reply #2 - 08/27/13 at 07:52:59 Thanks Dave, it just seems that they over engineered this fuel delivery system when a simple on and off valve would have sufficed.
Back to top	IP Logged

Dave YaBB Moderator ModSquad Offline SuzukiSavage.com Rocks! Posts: 18101 Camp Springs, Kentucky Gender:	Re: Stock Vac Petcock question Reply #3 - 08/27/13 at 08:52:41 It is an attempt to make this bike user friendly.....by being automatic instead of manual. The problem is that the petcock can be problematic......and erratic. If it just flat stopped it would be an easy problem to identify. The problem is that the failure can cause a lot of confusing symptoms.
Back to top	Someday I will be old......But not today! IP Logged

Pages: 1

‹ Previous topic | Next topic ›

« Home