Go Back   TeamTalk > Maintenance Tips, How-tos and Refurbishing Topics > Engine / Drive Train

Reply
 
Thread Tools Display Modes
  #1  
Old 01-10-2005, 03:24 PM
jayderwin1's Avatar
jayderwin1 jayderwin1 is offline
TT Enthusiast
 
Join Date: Dec 2004
Boat: MasterCraft, ProStar 190, 1986, 351.
Location: Nashville, TN
Posts: 331
stalling motor

when i rev my motor up and slow it back fast it will kill the motor does any one have any suggestions my motor has carbs.
Reply With Quote
  #2  
Old 01-10-2005, 04:14 PM
east tx skier's Avatar
east tx skier east tx skier is offline
MC Hero
 
Join Date: Jul 2004
Boat: 1998 Ski Nautique
Location: End of my rope.
Posts: 25,360
Are you idling or in gear when you rev it up (it sounds like you're idling, but wanted to be sure).
__________________
Previous: 1993 Prostar 205

Red 1998 Closed Bow Ski Boat, Ford 351, 310 hp, Acme 4 blade, Perfect Pass SG.

FAQ


Tyler Ski Club


To me, this forum is about love of inboard boats. It is about the sharing of information and, on a good day, some humor. It is not about post count, brand of boat, or any other superfluous labels that lend themselves to a false sense of superiority. Please, respect one another, try to pass on accurate information, and keep your eye on the ball.
Reply With Quote
  #3  
Old 01-10-2005, 04:36 PM
jayderwin1's Avatar
jayderwin1 jayderwin1 is offline
TT Enthusiast
 
Join Date: Dec 2004
Boat: MasterCraft, ProStar 190, 1986, 351.
Location: Nashville, TN
Posts: 331
Question

for example when i back the boat off the trailer and i give it some gas to pull back then i move the throttle back to neutral when the boat gets off the trailer the motot will die. your probably think that the motor is still cold but it happens when the motor heats up to running temp about 170 although it does not happen so easily. the only thing i can think it might be is the idle is set to low. but to answer your question it will happen in idle or a neutral rev. can you think of anything it might be?
Reply With Quote
  #4  
Old 01-10-2005, 05:15 PM
east tx skier's Avatar
east tx skier east tx skier is offline
MC Hero
 
Join Date: Jul 2004
Boat: 1998 Ski Nautique
Location: End of my rope.
Posts: 25,360
I had my share of carb trouble, but if you're in an older boat, which it looks like you are, we're now running the same carb.

Two things to at least consider if it's not been a while since your last rebuild is (1) fuel slosh and (2) heat sensitivity. Both were problems commonly associated with my 4010 Holley Carb. Then again, your idle might be low. If you've got a manual, it should tell you the idle range. Mine is at about 615 rpm. If I adjust it to about 510, it starts to stumble.
__________________
Previous: 1993 Prostar 205

Red 1998 Closed Bow Ski Boat, Ford 351, 310 hp, Acme 4 blade, Perfect Pass SG.

FAQ


Tyler Ski Club


To me, this forum is about love of inboard boats. It is about the sharing of information and, on a good day, some humor. It is not about post count, brand of boat, or any other superfluous labels that lend themselves to a false sense of superiority. Please, respect one another, try to pass on accurate information, and keep your eye on the ball.
Reply With Quote
  #5  
Old 01-10-2005, 06:04 PM
jayderwin1's Avatar
jayderwin1 jayderwin1 is offline
TT Enthusiast
 
Join Date: Dec 2004
Boat: MasterCraft, ProStar 190, 1986, 351.
Location: Nashville, TN
Posts: 331
yours is 615 is that normal? my is about 400 so that may be the problem at least i hope i would hate to have to rebuild a carb.
Reply With Quote
  #6  
Old 01-10-2005, 06:10 PM
Dan K Dan K is offline
MC Fanatic
 
Join Date: Jul 2004
Boat: 81 Stars & Stripes
Location: Midwest
Posts: 514
If your idle isn't smooth it could also be a vacuum leak, I had a similar issue and I determined that my carb gasket was allowing air to suck in. I found it by spraying carb cleaner around the gasket slowly as the engine idled. If you get a surge it is from the cleaner being sucked in. either tighten the carb or replace the gasket. There are other sorces for vacuum leaks such as around the manifold.
Reply With Quote
  #7  
Old 01-10-2005, 06:47 PM
east tx skier's Avatar
east tx skier east tx skier is offline
MC Hero
 
Join Date: Jul 2004
Boat: 1998 Ski Nautique
Location: End of my rope.
Posts: 25,360
615 rpm is within the normal range for my engine, which, according to my manual is 600--800 for both the 351 and the 351 HO.
__________________
Previous: 1993 Prostar 205

Red 1998 Closed Bow Ski Boat, Ford 351, 310 hp, Acme 4 blade, Perfect Pass SG.

FAQ


Tyler Ski Club


To me, this forum is about love of inboard boats. It is about the sharing of information and, on a good day, some humor. It is not about post count, brand of boat, or any other superfluous labels that lend themselves to a false sense of superiority. Please, respect one another, try to pass on accurate information, and keep your eye on the ball.
Reply With Quote
  #8  
Old 01-10-2005, 07:29 PM
André's Avatar
André André is offline
MC Maniac
 
Join Date: Jul 2004
Boat: Prostar 190 1994
Location: Near Sherbrooke,Québec,Canada
Posts: 4,430
400 revs at idle seems low for any kind of engine...
__________________
Keep skiing!!!
Reply With Quote
  #9  
Old 01-24-2005, 03:47 PM
jayderwin1's Avatar
jayderwin1 jayderwin1 is offline
TT Enthusiast
 
Join Date: Dec 2004
Boat: MasterCraft, ProStar 190, 1986, 351.
Location: Nashville, TN
Posts: 331
how do you adjust the carb so it will idle higher?
Reply With Quote
  #10  
Old 01-24-2005, 03:57 PM
east tx skier's Avatar
east tx skier east tx skier is offline
MC Hero
 
Join Date: Jul 2004
Boat: 1998 Ski Nautique
Location: End of my rope.
Posts: 25,360
There is an idle adjust screw on the port side of the carb about half-way back.
__________________
Previous: 1993 Prostar 205

Red 1998 Closed Bow Ski Boat, Ford 351, 310 hp, Acme 4 blade, Perfect Pass SG.

FAQ


Tyler Ski Club


To me, this forum is about love of inboard boats. It is about the sharing of information and, on a good day, some humor. It is not about post count, brand of boat, or any other superfluous labels that lend themselves to a false sense of superiority. Please, respect one another, try to pass on accurate information, and keep your eye on the ball.
Reply With Quote
Reply

Thread Tools
Display Modes

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


All times are GMT -4. The time now is 03:35 PM.