Carb vs Fuel Inj?
01-07-2015, 06:49 AM
#11
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01-07-2015, 07:14 AM
#12
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thanks RB
01-07-2015, 07:58 AM
#13
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I was just thinking that the MPI would be a lot less trouble on a boat. Just your basic stock Merc MPI on a stock motor or a stock carb on a stock motor. I am looking to buy a boat and have stayed away from boats with carbs. I am looking for something that is reliable, that idles good, and restarts are no problem after a hard run. Will a carb do all that no problem? I am sure the carbs are a lot better now than when I was messing with hot rods many years ago!
thanks RB
thanks RB
01-07-2015, 08:09 AM
#14
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Old early Merc EFI systems were a decade or more behind in technology WHEN THEY WERE NEW! The old factory systems can't hold a candle to the new aftermarket systems. I love my Holley HP EFI self tuning system. Set it up correctly with a return regulator and it will never vapor lock. The old Merc systems used a single large fuel rail that were returnless and just would bake on top of the motor from the latent heat when you shut them off. You can get good aftermarket systems for about the price some people think their take off Merc systems are worth.
01-07-2015, 09:35 AM
#15
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modify the merc system to return to the tank and most problems are solved.
01-07-2015, 12:40 PM
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It is a trade off. EFI more reliable but when it needs attention it is a nightmare with dozens of sensors/etc that could be causing trouble. 10% more power. A carb and one wire distributor is nice, nothing is simpler, you can draw the entire fuel and electrical system from memory in seconds. EFI is wildly more complex.
01-07-2015, 07:29 PM
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01-08-2015, 10:13 AM
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The stock mpi worked fine on my ProCharged 502. It did have a return to tank fuel line setup. That said it always fired right up. With my new build this winter I'm upgrading to the Holley HP EFI but ide keep the old mpi long before ide run a carb. This is an expensive boat though, if I had a small "hot rod" jet boat then a carb might be OK.. Just my opinions.
