GT40 throttle body
Printed From: CorrectCraftFan.com
Category: General Correct Craft Discussion
Forum Name: General Discussion
Forum Discription: Anything Correct Craft
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=41547
Printed Date: March-06-2025 at 8:32pm
Topic: GT40 throttle body
Posted By: jellison
Subject: GT40 throttle body
Date Posted: July-18-2017 at 12:56pm
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Hey guys. im having a small issue with my gt40. Currently the boat runs great at all RPM from idle to top speed. However if i run the boat on plane and then come off the throttle quickly to pick up a skier etc. the boat drops back to neutral but the RPM stay running at the higher RPM when the boat was towing. I have replaced the throttle cable, shift cable and tried disconnecting the servo for perfect pass. still i have the issue. I have been having to reach back and pull the lever on the throttle body towards the bow to get the boat back to idle every time a skier falls. By process of elimination im thinking that the spring in the throttle body may be worn out and losing its ability to bring the boat back to idle? I looked it up and i would have to buy a whole new throttle body for 500 bucks!!!!!! holy cow. ridiculous considering you can pick up a ford throttle body for a couple hundred bucks just about anywhere (obviously i wouldnt do that). i have found quite a bit of corrosion on the throttle body and it is filthy!!!!! i think the previous owner ran the boat in brackish water. so my question is have any of you had this happen before? anyone cleaned their throttle body? should i buy a new one? :(  ps. all the cables were run in the same locations as they were from the factory so i dont have any weird bends etc that might cause the cable to bind. thanks! ------------- MY BOATS: 1988 Ski Nautique (SOLD) 1998 Air Nautique |
Replies:
Posted By: jellison
Date Posted: July-18-2017 at 3:16pm
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where is lewy2001? he always has an answer :) ------------- MY BOATS: 1988 Ski Nautique (SOLD) 1998 Air Nautique |
Posted By: JoeinNY
Date Posted: July-18-2017 at 3:41pm
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I assume you have some speed control? You really need to clean that throttle body - its got to be pretty corroded - a return spring may also be needed but not before that thing moves free and easy and doesn't get stuck. ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=1477 - 1983 Ski Nautique 2001 1967 Mustang 302 "Decoy" http://www.youtube.com/watch?v=cO5MkcBXBBs - Holeshot Video |
Posted By: Gary S
Date Posted: July-18-2017 at 3:47pm
Most likely sleeping he's 15 -16 hours ahead of us  I would venture a guess that the throttle body is not a marine specific part anyway see if it has a ford part number cast into it and google that and see what comes up. ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=1711&sort=&pagenum=1&yrstart=1966&yrend=1970" rel="nofollow - 69 Mustang HM SS 95 Nautique Super Sport |
jellison wrote:Posted By: KENO
Date Posted: July-18-2017 at 4:31pm
I was gonna say what Gary said, but he beat me to it so I won't say it
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Posted By: jellison
Date Posted: July-19-2017 at 11:26am
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i found a part number and tried to run it..... came back with nothing. also i checked a non marine throttle body and see that the cable mounting lever looks different than the cable mount on the marine version. I got some throttle body cleaner that is approved for ford throttle bodies last night and pulled the throttle body off the intake before the storms came in. So i will give it a good cleaning tonight and see if it helps. If it is the return spring... have you ever had to change one? looks easy but i would imagine it has a low tolerance for error. haha. ------------- MY BOATS: 1988 Ski Nautique (SOLD) 1998 Air Nautique |
Posted By: jellison
Date Posted: July-19-2017 at 12:34pm
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Just ran the part number by a local Ford performance shop here in Orlando. Bad news. looks like the throttle body is specific to the boat :( He said he has seen this so many times here in orlando that it makes him sick. He even quoted the model number to me before i could give it to him! UNREAL! so if cleaning it doesnt work then i am stuck paying the ridiculous price from the dealer. ugh. What happens when there are no throttle bodies left at the factory?! So frustrating. Guess i will look into the spring replacement option as well. ------------- MY BOATS: 1988 Ski Nautique (SOLD) 1998 Air Nautique |
Posted By: Bri892001
Date Posted: July-19-2017 at 12:40pm
| I'd give Jody at FL Inboards a call. It seems like the type of thing he might potentially have laying around at his shop. |
Posted By: JoeinNY
Date Posted: July-19-2017 at 12:48pm
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First clean it, remove corrosion, get her loose. You might be able to add a throttle return spring from a carb setup if you cant work anything with the original spring that works. There were not too many ford 351s running around on the streets fuel injected with a single throttle body setup so it doesn't surprise me that its an industrial/marine only part. But not much to go wrong with it either. ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=1477 - 1983 Ski Nautique 2001 1967 Mustang 302 "Decoy" http://www.youtube.com/watch?v=cO5MkcBXBBs - Holeshot Video |
Posted By: jellison
Date Posted: July-19-2017 at 12:55pm
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so you are saying if the cleaning doesnt work i could add a spring? is that in addition to the existing spring that is on the throttle body all ready? ------------- MY BOATS: 1988 Ski Nautique (SOLD) 1998 Air Nautique |
Posted By: jellison
Date Posted: July-19-2017 at 12:56pm
just gave him a call. we will see what he says. thanks for the reference. ------------- MY BOATS: 1988 Ski Nautique (SOLD) 1998 Air Nautique |
Posted By: Gary S
Date Posted: July-19-2017 at 12:58pm
Any Ford numbers on it? Many Ford "marine" parts are in fact from their industrial division. They just didn't make a part just for one use,marine to them was small potatoes. Post up some pictures,I'm not like Ken who will go out and pull his apart to check parts. ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=1711&sort=&pagenum=1&yrstart=1966&yrend=1970" rel="nofollow - 69 Mustang HM SS 95 Nautique Super Sport |
Posted By: jellison
Date Posted: July-19-2017 at 1:34pm
part number is F1JL-CB ------------- MY BOATS: 1988 Ski Nautique (SOLD) 1998 Air Nautique |
Posted By: KENO
Date Posted: July-19-2017 at 2:57pm
That's only a partial part number, The whole part number is F1JL-9E926-CB. You can find that on the internet. F1 means it was first made in 1991 J means it was for the industrial power products division L tells that the same division was responsible for the design 9E926 is the numerical designator for a throttle body CB tells which release or revision it was. A quick check found one for a mere 426 bucks but with some searching you might find cheaper or a used one |
Posted By: jellison
Date Posted: July-19-2017 at 3:45pm
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nice find!!!!!!!! ive been hunting for the full part number and could only find the PCM number PCM # is ra035029 in case anyone wants it. ------------- MY BOATS: 1988 Ski Nautique (SOLD) 1998 Air Nautique |
Posted By: jellison
Date Posted: July-19-2017 at 5:56pm
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found the throttle body for 360 bucks. im going to install the cleaned throttle body i have here on friday and run the boat a bit. if that doesnt work at least we know where to find a replacement.... https://pittauto.com/item/FOR%20F1JL9E926CB?catlist=478&parent=262 %20" rel="nofollow - ------------- MY BOATS: 1988 Ski Nautique (SOLD) 1998 Air Nautique |
Posted By: KENO
Date Posted: July-19-2017 at 6:16pm
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That's the same one Google found for me. I must have misread the price or couldn't remember it 2 minutes later . I think a cleaning job will work................hopefully |
Posted By: jellison
Date Posted: July-19-2017 at 11:08pm
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throttle body cleaner worked wonders. im going to put it on the boat and see if it works friday morning. thanks for all the help everyone! ------------- MY BOATS: 1988 Ski Nautique (SOLD) 1998 Air Nautique |
Posted By: jellison
Date Posted: July-22-2017 at 4:32pm
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update: so i got the throttle body installed. boat started up fine and idled really well. I didnt notice that my idle was a bit high before the cleaning. I got my timing light out and checked the timing to make sure i didnt need to correct anything. (reason being is that I installed a new distributor a few weeks ago and timed the boat with a high idle). Boat was timed out great. Went to go run the boat and had to put it back in the boat house due to a storm creeping over the lake. I will get to run the boat at full throttle tomorrow so i will post another update after church. ------------- MY BOATS: 1988 Ski Nautique (SOLD) 1998 Air Nautique |
Posted By: DHMcFadin
Date Posted: July-13-2019 at 9:45pm
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I know this is an old thread but after removing and cleaning the throttle body, did you have to replace any gaskets? If so, where did you find them? ------------- 1999 Longhorn Nautique 1995 Nautique Super Sport https://www.instagram.com/longhorn_nautique/" rel="nofollow - https://www.instagram.com/longhorn_nautique/ |
Posted By: Gary S
Date Posted: July-14-2019 at 12:26am
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Recent thread http://www.correctcraftfan.com/forum/forum_posts.asp?TID=47689&KW=&PID=572314&title=pcm-gt-40-part-numbers#572314" rel="nofollow - link on gaskets ------------- http://www.correctcraftfan.com/diaries/details.asp?ID=1711&sort=&pagenum=1&yrstart=1966&yrend=1970" rel="nofollow - 69 Mustang HM SS 95 Nautique Super Sport |