GT40 throttle body

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!

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.

Gary S wrote:      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.

I was gonna say what Gary said, but he beat me to it so I won't say it

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.

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.

Bri892001 wrote: 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.

just gave him a call. we will see what he says. thanks for the reference.

Gary S wrote: jellison wrote: 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.      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.

part number is F1JL-CB

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.

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

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.

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