Hard starting when warm
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Engine Repair
Forum Discription: Engine problems and solutions
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=15188
Printed Date: May-17-2024 at 6:47am
Topic: Hard starting when warm
Posted By: wakemeup
Subject: Hard starting when warm
Date Posted: September-06-2009 at 2:38am
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I've got a 99 Air Nautique with a Pro Boss 351, 310 HP motor. The boat starts fine when cold but when it is warm I have to hold the key in the start position for about 5 seconds or so before it starts. It doesn't always do this, there is no pattern. It has always started but having to "turn it over" so much before it starts is annoying. Any insight from anyone as to whats happening is appreciated.
Thanks ------------- Wakemeup 1988 Ski Nautique 1999 Air Nautique |
Replies:
Posted By: jerry@vail.net
Date Posted: September-08-2009 at 4:36pm
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Check out this thread:
http://correctcraftfan.com/forum/forum_posts.asp?TID=14377&PID=176239#176239 Is this similar to your symptoms? ------------- Jerry |
Posted By: wakemeup
Date Posted: September-08-2009 at 6:10pm
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Mine has never stalled or ran rough after starting. The only problem is you have to hold the key in the start position way to long before it starts. Anyway let us know what the PCM guy says.
Thanks ------------- Wakemeup 1988 Ski Nautique 1999 Air Nautique |
Posted By: behindpropeller
Date Posted: September-08-2009 at 6:59pm
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I think that is pretty normal on the 310 hp engines...... ------------- |
Posted By: wakemeup
Date Posted: September-09-2009 at 2:09am
Thats unfortunate! Everytime someone else drives the boat so I can board I have to tell them to hold the key in the start position until it fires. My friends Sanger with a Chevy Mercruser lights within 1/2 a second to holding the key in start every time. Oh well thats what I get with owning a Ford. That Chevy 350 is the best engine ever built for any application, its bullet proof. ------------- Wakemeup 1988 Ski Nautique 1999 Air Nautique |
behindpropeller wrote:Posted By: SNobsessed
Date Posted: September-09-2009 at 9:58am
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My 351 starts with that 1/2 second period. If your timing is set too advanced, that will make it start hard when hot. I backed mine off 1 degree (to 9) & that helped it start easier. ------------- “Beer is proof that God loves us and wants us to be happy.” Ben Franklin |
Posted By: wakemeup
Date Posted: September-09-2009 at 3:44pm
I'll give that a shot. Thanks for your input. ------------- Wakemeup 1988 Ski Nautique 1999 Air Nautique |
Posted By: gun-driver
Date Posted: September-09-2009 at 4:01pm
| Has nothing to do with being a Ford. My GT-40 starts on the first crank every time hot or cold. Start looking deeper than the name. |
Posted By: beck
Date Posted: September-09-2009 at 9:04pm
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it could be vapor locking, my 94 sport nautique does that, we just leave the engine cover open after we use it and it starts up fine later ------------- 1994 Sport Nautique 21ft 5.8L EFI Pro Tec Injection 310HP |
Posted By: 8122pbrainard
Date Posted: September-09-2009 at 9:31pm
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Brandon,
I'd wager to say it's not vapor locking (real hard to do on a boat) but rather your Pro Tech suffering from heat soak. ------------- /diaries/details.asp?ID=1622" rel="nofollow - 54 Atom /diaries/details.asp?ID=2179" rel="nofollow - 77 Tique 64 X55 Dunphy Keep it original, Pete < |
Posted By: beck
Date Posted: September-09-2009 at 9:40pm
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well we do that and it works everytime lol, if we dont keep it open after using it then it doesnt start 15 minutes later ------------- 1994 Sport Nautique 21ft 5.8L EFI Pro Tec Injection 310HP |
Posted By: Fl Inboards
Date Posted: September-09-2009 at 10:22pm
Did we have protech in 99? I thought that went away in about 94. I to agree that vapor lock is probably not the cause. I take it this is a HO carb motor? And not a GT-40. ------------- 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 |
Posted By: TRBenj
Date Posted: September-09-2009 at 10:24pm
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Posted By: wakemeup
Date Posted: September-09-2009 at 10:37pm
I take it you just idle the boat when you are switching skiers/boarders in the open water. I am fairly new to boating but was taught to turn the motor off anytime someone was going in or out of the boat, especially around the swim step. I'm constantly turning the boat on and off. ------------- Wakemeup 1988 Ski Nautique 1999 Air Nautique |
Posted By: beck
Date Posted: September-09-2009 at 10:46pm
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ya we just leave it run, and then you know if your out there for the weekend and you take it out, open up the engine cover and just leave it open until you use it next, let me know how that works for you ------------- 1994 Sport Nautique 21ft 5.8L EFI Pro Tec Injection 310HP |
Posted By: Fl Inboards
Date Posted: September-09-2009 at 10:52pm
We still need to know if it is a GT-40 or a carb motor???? ------------- 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 |