heres my 2cents.i had efi in one of my boats for 5yrs.it ran flawlessly.at times i could get 3.4mpg @45mph.i started having problems with the efi.i have never worked on efi,let alone fuel injection,but i did mess around w/hotrods in my younger years,so i was comfortble w/a carb.after paying people to work on efi,i decided to go with what i could work on.i switched a carg.heres what i lossed.i lossed about a i/2 gal on my fuel consumption,from 3.5 to 3.0 miles per gallon.i loss the get in and turn the key idle on the boat.heres what i gained.a set up i could work on.i gained parts excess,i can walk into any auto store and buy carb parts and stuff fot the distributor.i can trouble shoot the carb.but the biggest thing i gained,,,,,,,pease of mind.knowing if it broke,i could fix it myself,and i wouldnt go broke paying someone to fix it.jus my 2cents.

I have given it a lot of thought guys and I agree with you. Stock blue motors are hard to beat. I have the factory build sheet from Fountain and all motors and drives are 100% factory. The center gimble was upgraded to an HP Gimble but other then that... everything is 100% original to the boat.

The more I think about it... finding one of these 47's bone stock and all original is like picking up a numbers matching 69 Camaro with the original build sheet. (well... kind of :whistle: )

Alright... the drives are in Clearwater right now getting a full bearing / seal rebuild... should have them back along with the rams in a week or so. I am going to go ahead and take the trip 500's out in about a week and begin the rebuild process. That way... when everything is put back together, I'll have a fully documented zero hour boat all the way around. Also performing general service to the generator and HVAC unit, etc...

New upholstery was installed last week on the engine hatches along with other parts and pieces. Should make for a good ride... I'll keep you guys posted and thank you for the help!!!!

Q

I have 2 boats one with EFI one without.


EFI on a boat does not provide the benefits that it does in an a car because there is no O2 sensor in the loop when running to continuously "retune".

Water wreaks havoc with the O2 sensors so Marine EFI operates in a closed loop environment. It gets tuned once then is "set". Sure you can apply a different a map

Yes you get instant starting, kitten like idling, and great part throttle economy.

You do NOT get altitude compensation without retuning.

Swapping jets is almost as easy (some would say easier) as dragging out a laptop, putting in an O2 sensor, and retuning.

I love my EFI rig, but there is a lot to be said for the dead on simplicity of a carb.

Uncle Dave

I would love to have a 47'. If and when I am lucky enough to move up I would want mine with stock motors. JMO