View Full Version : EFI for Older Mastercrafts

08-09-2012, 04:42 PM
Anyone know of a high quality EFI system for older Mastercrafts? I have a 1993 and would love to experience the smoothness and reliability of EFI instead of a carburetor.

08-09-2012, 04:54 PM
A correctly tuned carburetor should run just as smoothly and reliably as FI. What are your issues?

08-09-2012, 04:56 PM
My carburetor was recently rebuilt and it is not nearly as good as my brother's efi nautique that lights up instantly.

08-09-2012, 04:57 PM
So you're having starting issues?

08-09-2012, 05:06 PM
yes...especially compared to my brother's boat

08-09-2012, 05:10 PM
It is available, but not economical. Click Here (http://www.holley.com/700-21.asp)

08-09-2012, 05:19 PM
I had the same guy rebuild the carbs on my 79 and 87 MC boats. They both started perfectly hot or cold. I think it depends on who does the rebuild. Of course I like my EFI now too. :D

08-09-2012, 05:21 PM
I am about to get into the carb rebuilding business. There seems to be a lot of need, and I have a lot of experience.

08-10-2012, 09:40 AM
I rebuilt the carb on my 89 prostar and it still wasn't running as smooth as an EFI boat. I replaced it the season after with a brand new 4160 from skidim and the boat runs amazing. Starts right up and the boat feels so much smoother now and the throttle response has vastly improved.

I'd suggest getting a new carb and make sure the timing is correct and I think you will be very pleased with the results (assuming you don't have any additional maintenance issues causing the problem).

08-10-2012, 10:05 AM
I have a timing light- you just got all my experience.

08-10-2012, 01:25 PM
I've had 3 boats that needed carburetor help. I switched them all to an Edelbrock marine carb. I found these to be much easier starting, smoother idle, and they eliminate the vacuum operated secondaries surge we experienced @ 36mph with the older powerslot.