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I want to fit a jag xj8 engine to a fonda jet boat what do I…

Customer Question
Hi, I want to...

Hi, I want to fit a jag xj8 engine to a fonda jet boat what do I need/has anyone done this conversion thanks Dave.

Mechanic's Assistant: Sometimes boat issues seem like they'll be really complicated, but end up being easy to fix. The Marine Mechanic I'm going to connect you with knows all the tricks and shortcuts. Tell me a bit more about what's going on so the Marine Mechanic can help you best.

I.have a jaguar xj8 4.0 engine my boat doesnt have a engine so I want to fit this one

Mechanic's Assistant: Is there anything else important you think the Marine Mechanic should know?

I am not sure what is needed to convert

Submitted: 9 months ago.Category: Boat
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Answered in 4 days by:
11/15/2017
Marine Mechanic: Boat Doc, Boat Enthusiast replied 9 months ago
Boat Doc
Boat Doc, Boat Enthusiast
Category: Boat
Satisfied Customers: 244
Experience: Expert at Just Answer
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Hi, my name is ***** ***** I'll be assisting you with your boat question. I apologize for the extended wait time you experienced,
I've only just come online now and would like to assist you with your question. Did you still need some help with this?

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Customer reply replied 9 months ago
please
Marine Mechanic: Boat Doc, Boat Enthusiast replied 9 months ago

Is this a later model XJ 8 with fuel injection?

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Marine Mechanic: Boat Doc, Boat Enthusiast replied 9 months ago

W​hat kind of engine was the boat originally rigged with?

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Customer reply replied 9 months ago
its from a 2000 year xj8 the boat hasnt had an engine fitted before
Customer reply replied 9 months ago
posting in behalf of the customer***
The boat hasn't had a engine fitted before
Marine Mechanic: Boat Doc, Boat Enthusiast replied 9 months ago

O​kay, the list of fabrication to do this would be long and frankly, complicated. Just adapting a fuel injection computer to run the engine under the totally different loading of a boat application is a huge hurdle, the fuel and ignition curve is totally different than a car's. Assuming that could be done the next step is fabricating a wet exhaust, no standard pieces exist so you would need to have tube headers made, you could save some money by running dry exhaust, but that has to be over the transom with no enclosure above the engine. Anything enclosed in the boat must be run with wet sleeves to keep heat down. Expect over 1000 pounds to get stainless tube headers fabricated. You could use the closed cooling from virtually any marine engine but you have to have closed cooling with an alloy motor. Then you still need to fabricate an engine coupler and engine mounts, since none exist commercially. I hate to say it, but if you are even asking how to do it, the challenges you are facing are beyond your abilities, unless you have many thousands of pounds available and about 2 years to devote to the project.

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Customer reply replied 8 months ago
OK I will let you know when I have done it (sometime next summer) thanks, Dave.
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