GT-40 Won't Idle Down

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   Have you unhooked the vacuum line on the pressure regulator and see if the idle changes?

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Tim D Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: August-23-2004 Location: United States Status: Offline Points: 2641	Post Options Post Reply Quote Tim D Report Post Thanks(0) Quote Reply Topic: GT-40 Won't Idle Down Posted: September-21-2015 at 11:47pm
	Have you unhooked the vacuum line on the pressure regulator and see if the idle changes?
	Tim D

jhersey29 Members Profile Send Private Message Find Members Posts Visit Members Homepage Add to Buddy List Senior Member Joined: February-20-2014 Location: Colorado Status: Offline Points: 272	Post Options Post Reply Quote jhersey29 Report Post Thanks(0) Quote Reply Posted: September-21-2015 at 11:28pm
	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

jhersey29 Members Profile Send Private Message Find Members Posts Visit Members Homepage Add to Buddy List Senior Member Joined: February-20-2014 Location: Colorado Status: Offline Points: 272	Post Options Post Reply Quote jhersey29 Report Post Thanks(0) Quote Reply Posted: September-21-2015 at 11:26pm
	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..

Bri892001 Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: September-27-2008 Location: Boston MA Status: Offline Points: 4947	Post Options Post Reply Quote Bri892001 Report Post Thanks(0) Quote Reply Posted: September-21-2015 at 3:15pm
	Idle Air Control Valve possibly? Solution would be to clean or replace.

ddonaldson Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: September-18-2015 Location: Tennessee Status: Offline Points: 3	Post Options Post Reply Quote ddonaldson Report Post Thanks(0) Quote Reply Posted: September-21-2015 at 1:56pm
	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).

74Wind Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: August-02-2011 Location: Georgia Status: Offline Points: 2101	Post Options Post Reply Quote 74Wind Report Post Thanks(0) Quote Reply Posted: September-18-2015 at 9:51pm
	27 years old....Excuse me, while I kiss the sky....scarily prophetic, eh? .
	1974 Southwind 18 1975 Century Mark II

Hollywood Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: February-04-2004 Location: Twin Lakes, WI Status: Offline Points: 13513	Post Options Post Reply Quote Hollywood Report Post Thanks(0) Quote Reply Posted: September-18-2015 at 5:39pm
	Jimi died on this day.

quinner Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: October-12-2005 Location: Unknown Status: Offline Points: 5828	Post Options Post Reply Quote quinner Report Post Thanks(0) Quote Reply Posted: September-18-2015 at 5:30pm
	Probably meant 1995, do you have perfect pass?

Fl Inboards Members Profile Send Private Message Find Members Posts Visit Members Homepage Add to Buddy List Grand Poobah Joined: January-20-2008 Location: United States Status: Offline Points: 2106	Post Options Post Reply Quote Fl Inboards Report Post Thanks(0) Quote Reply Posted: September-18-2015 at 5:29pm
	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

Jonny Quest Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: August-20-2013 Location: Utah--via Texas Status: Offline Points: 2957	Post Options Post Reply Quote Jonny Quest Report Post Thanks(0) Quote Reply Posted: September-18-2015 at 5:17pm
	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

ddonaldson Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: September-18-2015 Location: Tennessee Status: Offline Points: 3	Post Options Post Reply Quote ddonaldson Report Post Thanks(0) Quote Reply 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.

GT-40 Won't Idle Down

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