Tested | Mercury 9.9 HP EFI v CARBY

It might be like watching the Grade 1 sprint racing heats at primary school, but we get the new Mercury EFI 9.9 4-Stroke next to its superseded carbureted sibling and see what comes out on top.
Spoiler: The performance is near identical, but the EFI does it with up to 27% less fuel burned.

[@nathanjohnson3668]

Looks like carb was slower in response out of the hole but was starting to pull away at the end. EFI will have the quicker input responses but looks like the carb still has the better overall performance if you remove that delay (nobody is dragging racing when out in there boat so wouldn’t even notice that delay difference, only the top end difference and if it had poorer hole shot which it looks like it didn’t). EFI wins on the fuel efficiency hands down though and I would take that over the slightly better performance form the carb. Although, I’m sure the maintenance is easier to do on the carb over the EFI engine as the motor ages. Would still go EFI though in this comparison. Nice review!

[@jaydenbourke3722]

So excited for a efi 9.9
Does the command thrust have efi as well or is that still carb

[@SebPa-d1m]

Does the Engine has an Easy Start System, decompression?

[@davidreta3664]

I’d like to know as well beacuse when I do compression test it’s comes out 60

[@robertmcallister4164]

"Up to 27% better fuel efficiency" - This statement is straight from the colouring-in department and without further explanation could mean that the engine is more or less efficient at different rpm ranges. Why not take them out for a typical days fishing alongside each other with a couple of kids or an esky of beer, and compare how much fuel they would typically use in the same outing instead of just repeating marketing garbage?

[@robertmcallister4164]

While you're at it, I've got one of the carbureted engines, which is the same as the Tohatsu 9.8. Its a reasonable engine but it vibrates like crazy. Is there any difference with the new one? The fresh water port would be a nice addition but other than that they're very similar. Does the new one still have a 12 spline prop?

[@FishingMonthly]

Biggest difference is that they start better when they're at running temp.

[@robertmcallister4164]

@@FishingMonthly I never really have trouble starting mine when it's at temp, although cold starting sometimes requires a few pulls and always the full choke. Not having to remember to turn off the choke is another obvious benefit of the EFI.

[@ThatWasFun22]

Hi were they both 4stroke