Like Tree0Likes

Need Help with Carb Motor, Wont start??

Reply
Old 04-15-2009, 12:18 AM
  #1
Registered
Thread Starter
 
Join Date: Aug 2008
Location: Haslet, TX
My Boats: 02-Baja 29 outlaw
Posts: 48
Default Need Help with Carb Motor, Wont start??

Ok guys, Just got done putting the motors back together and everything is buttoned up on the engines. I went to start the motors and one fired right up, with no problems. The other seems like it isn't getting any fuel in the carb. Theres some fuel in the secondary fuel bowl(like 2 squirts), but nothing in the primary. Did nothing to the carbs or fuel system, just took it off and set it to the side.



I topped off the fuel filters with gas, so I know thats not it.

Theres gas coming out of the line but it not filling the carb.



????



I have a poker run saturday so I need to fix this Fast.



Thanks guys
KWIKSS is offline  
Reply With Quote
Old 04-15-2009, 02:35 AM
  #2
Registered
 
Join Date: Mar 2009
Posts: 496
Default

What engine and carb do you have? Sounds like the needle and seat kit is stuck. Some times you can tap on the carb in the area of the needle and seat a little if you know where it is mounted inside and it might free it self up as long as it is not to clogged up on the inside.
Boat Tech is offline  
Reply With Quote
Old 04-15-2009, 07:36 AM
  #3
Registered
Trade Score: (1)
 
rchevelle71's Avatar
 
Join Date: Aug 2003
Location: Boca Raton
My Boats: 1982 Pantera 24sport
Posts: 7,392
Default

Swap carbs from one motor to the other, just to make sure thats the problem, then if it is, have your bad carb looked at.
rchevelle71 is offline  
Reply With Quote
Old 04-15-2009, 08:18 AM
  #4
Registered
Thread Starter
 
Join Date: Aug 2008
Location: Haslet, TX
My Boats: 02-Baja 29 outlaw
Posts: 48
Default

BB 509 with Holly 750 carb.

Also a Mechanial fuel pump.

I like the tap on the carb to free it loose. I'll try that first
KWIKSS is offline  
Reply With Quote
Old 04-15-2009, 09:48 AM
  #5
Registered
Trade Score: (1)
 
rchevelle71's Avatar
 
Join Date: Aug 2003
Location: Boca Raton
My Boats: 1982 Pantera 24sport
Posts: 7,392
Default

Quote:
Originally Posted by KWIKSS View Post
BB 509 with Holly 750 carb.

Also a Mechanial fuel pump.

I like the tap on the carb to free it loose. I'll try that first

Try that, then if that doesnt work, its easy enough to remove the bowl on a holley, and put a needle/seat in there.
rchevelle71 is offline  
Reply With Quote
Old 04-15-2009, 12:05 PM
  #6
Registered
 
Join Date: Feb 2009
Posts: 9
Default

If the bowls are empty except for a little in rear bowl its probably not the needle they ussually stick open and flood the engine thru the bowl vent. Does your boat have fuel cut offs someone may have shut off? Also you could do a vacum and pressure test on the on the pump? Hope any of tthese ideas get you to your Poker run.
Pink Propellers is offline  
Reply With Quote
Old 04-15-2009, 12:11 PM
  #7
Registered
 
blue thunder's Avatar
 
Join Date: Nov 2001
Location: Pennsylvania
My Boats: 330 Carver 30' Scarab Panther 17' ProV Lund
Posts: 3,359
Default

Fill the primary bowl manually with fuel through the float plug on the side. See if it fires.
blue thunder is offline  
Reply With Quote
Old 04-16-2009, 09:43 AM
  #8
Registered
Thread Starter
 
Join Date: Aug 2008
Location: Haslet, TX
My Boats: 02-Baja 29 outlaw
Posts: 48
Smile

Well got the motor started last night. Just had to top off the carb, and fix the timing alittle and it fired right up. Thanks guys
KWIKSS is offline  
Reply With Quote
Old 04-16-2009, 09:57 AM
  #9
SORE MEMBER
Platinum Member
 
Wobble's Avatar
 
Join Date: Apr 2004
Location: 2950'49.74"N 95 5'17.55"W.......TEXAS
My Boats: SeaDoo RXP & RXP-X, Stryker Equalizer 28, Eliminator Daytona Jet
Posts: 6,708
Default

Quote:
Originally Posted by KWIKSS View Post
Well got the motor started last night. Just had to top off the carb, and fix the timing alittle and it fired right up. Thanks guys
I think you had better order a new fuel pump. You should never have to prime the carb this way to get it started.

Either the pump is sucking air somewhere (do you have a generator on board) or the diaphragm is shot and you are likely putting fuel in the oil pan. Be sure and check your engine oil for fuel smell.

It is also possible that one of the check valves in the fuel pump is not seating which is no great risk but it would cause weak fuel pressure.
Wobble is offline  
Reply With Quote
Old 04-16-2009, 12:18 PM
  #10
Registered
 
blue thunder's Avatar
 
Join Date: Nov 2001
Location: Pennsylvania
My Boats: 330 Carver 30' Scarab Panther 17' ProV Lund
Posts: 3,359
Default

Wobbles right. This test just verifies carb function. Next you should see if the primary fuel bowl is maintaining level while running. If you made new AN lines over the winter you could have a piece of shaved rubber blocking the carb inlet at the needle. That's what I would look at if the float level drops.
blue thunder is offline  
Reply With Quote
Reply



Posting Rules
You may not post new threads
You may not 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 On
Pingbacks are On
Refbacks are On



All times are GMT -5. The time now is 11:30 AM.


Copyright 2011 OffShoreOnly. All rights reserved.