GT-40 Won't Idle Down |
Post Reply |
Author | |
ddonaldson
Newbie Joined: September-18-2015 Location: Tennessee Status: Offline Points: 3 |
Post Options
Thanks(0)
Posted: September-18-2015 at 4:48pm |
We run a 1965 Nautique with a GT-40. Occasionally (not all the time) when we idle down from "high throttle" the idle down does not respond and the engine "runs away" and we need to resort to turning the engine off. Sometimes engine will restart at idle normally. Other times engine is hard to start, will crank several revolutions, then stop cranking. This may happen a couple of times. If repeated enough, (and sometimes with a little throttle) engine will start.
What's going on. As usual intermittent problems are a pain. All help appreciated. |
|
Jonny Quest
Grand Poobah Joined: August-20-2013 Location: Utah--via Texas Status: Offline Points: 2957 |
Post Options
Thanks(0)
|
Are you sure it is a 1965 with a GT40?
|
|
Current
2003 Ski Nautique 206 Limited Previous 2001 Ski Nautique Open Bow 1994 Ski Nautique Open Bow Aqua skiing, ergo sum |
|
Fl Inboards
Grand Poobah Joined: January-20-2008 Location: United States Status: Offline Points: 2106 |
Post Options
Thanks(0)
|
Do you have perfect pass on it?
|
|
Hobby Boats can be expensive when the hobbyist is limited on their own skill and expertise.
1993 Shamrock "fat" 20. 2008 Nautique 196 5.0 |
|
quinner
Grand Poobah Joined: October-12-2005 Location: Unknown Status: Offline Points: 5828 |
Post Options
Thanks(0)
|
Probably meant 1995, do you have perfect pass?
|
|
Hollywood
Moderator Group Joined: February-04-2004 Location: Twin Lakes, WI Status: Offline Points: 13513 |
Post Options
Thanks(0)
|
Jimi died on this day.
|
|
74Wind
Grand Poobah Joined: August-02-2011 Location: Georgia Status: Offline Points: 2101 |
Post Options
Thanks(0)
|
27 years old....Excuse me, while I kiss the sky....scarily prophetic, eh?
. |
|
1974 Southwind 18
1975 Century Mark II |
|
ddonaldson
Newbie Joined: September-18-2015 Location: Tennessee Status: Offline Points: 3 |
Post Options
Thanks(0)
|
Forgive me - brain fart! 1996 Correct Craft with GT-40. Do not have Perfect Pass but do have Accuski. Have checked operation of the throttle control box of the Accuski and it is not hanging up (acting normally).
|
|
Bri892001
Grand Poobah Joined: September-27-2008 Location: Boston MA Status: Offline Points: 4947 |
Post Options
Thanks(0)
|
Idle Air Control Valve possibly?
Solution would be to clean or replace. |
|
jhersey29
Senior Member Joined: February-20-2014 Location: Colorado Status: Offline Points: 272 |
Post Options
Thanks(0)
|
Disconnect the throttle cable from the throttle body. It is only 1 nut and note the location of the washer so you reinstall the same. Does it idle down? What is the volts read on the throttle position sensor when at idle? It should be about 1..05 or less. Best under just under 1..
|
|
jhersey29
Senior Member Joined: February-20-2014 Location: Colorado Status: Offline Points: 272 |
Post Options
Thanks(0)
|
It could be as simple as someone bumped the bracket.that hold the throttle cable in place.. Can you send a picture of the bracket and throttle body with the spark arrestor off
|
|
Tim D
Grand Poobah Joined: August-23-2004 Location: United States Status: Offline Points: 2641 |
Post Options
Thanks(0)
|
Have you unhooked the vacuum line on the pressure regulator and see if the idle changes?
|
|
Tim D
|
|
Post Reply | |
Tweet
|
Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |