efi retrofit?

[pyro225]

Sorry if this is dumb sounding but is there such a thing as an efi retrofit for the brownband mercs (80s 90s)?

 

[Faztbullet]

What exactly do you mean by retrofit? Yes there are aftermarket ECU if thats your questions.....

 

[Chris1956]

Do you want to replace your carbs with Throttle Body Fuel Injection?

 

[Scott Danforth]

Yes, step 1. Sell existing motor. Step 2. Buy motor with EFI

 

[pyro225]

ha - yes throttle bodies/injection/ecu - not poss?

 

[Ike-110722]

Yes there are aftermarket EFI, but the cost is probably more than the engine is worth. I looked into this a couple of years ago for my Mercruiser 165. Forget it. It would be easier to just buy a used engine that already has EFI.

 

[Scott Danforth]

you have a 30 year old 2-stroke motor. while it is posible to locate an aftermarket EFI system and adapt it to your motor. it will cost more than buying a motor with EFI on it from the factory.

what is the particular issue that you are having that makes you think you need EFI?

 

[pyro225]

economy - i was talking to someone with twin 80hp diesel inboards and that thing can move it costs hime about 1/5th in the amount of fuel my 90hp i6 does... just a thought id reall like a diesel outboard but they are rare

 

[wired247]

I cant even imagine how slow a diesel outboard would be. Plodding around at 3000 RPM max with a week of tuesdays to get to full speed.

You arent going to find an injection set for a 90 HP L6. They dont exist. I'm sure someone with more time and money on their hands has build a custom unit and knowing how a Merc system works you MIGHT be able to retrofit a v6 system onto your late model L6 but it would take a lot of work including machine work . MAYBE.

 

[Scott Danforth]

you are comparing apples to school busses. first off, economy in a boat is controlled by your right hand. second, economy and boating are not one in the same. third, diesel fuel has more BTU's than gasoline. fourth, is the diesel a displacement hull and you are comparing it to your planing hull? and most importantly, EFI does not improve fuel economy. it improves driveability.

 

[jerryjerry05]

The Tohatsu Co. sold a diesel small motor 20hp or smaller.
Changing your motor to EFI wouldn't make it a diesel.

 

[Chris1956]

Scott is correct. An EFI unit on your motor would save little, if anything on fuel costs. Carb/EFI 2 cycle motors have about the same efficiency and inefficiencies by their design. A DFI outboard has more efficiency in it's design.

Diesel motors are a more efficient design, as are 4 cycle motors. Unfortunately you pay a price in weight for diesels and 4 cycle motors. You can also pay a price in performance with them as well.

 

[Faztbullet]

How about this fellas....A 300hp 2stoke deisel outboard!!!!!!!! and it weighs 300lbs!!!!!!!!
http://articles.maritimepropulsion.com/article/New-300hp-(224-kW)-Diesel-Outboard29225.aspx

 

[pyro225]

Thanks guys - wow that thing is a bit of a beast! I also looked at a Klaxon one which will run on petrol or diesel :/

 

[Chris1956]

That Diesel Outboard seems too good to be true. Don't 2 cycle diesel motors need a blower to force air into them?

How can they get 8 cylinders, fuel injection, a compressor, midsection and the rest of the motor to weigh only 300#? Seems like a hoax....

 

[Scott Danforth]

the 300# is for the powerhead only the motor is a cleaver bit of packaging, and will not be cheap

 

[Chris1956]

Yes, I see that the outboard is listed as an "impression" of what the motor would look like. I still find the weight of the diesel powerhead to be suspiously light. Maybe it has no starter, exhaust manifold or any cooling system components. Even then it is pretty lightweight for that kind of power.

 

[Scott Danforth]

the crank/piston is not conventional. the two opposing pistons are tied together with a slotted portion that the crank moves within. the concept is plausible for production, feasible is another conversation.