they've been running electric oil pumps on optis for quite some time now. If you disconnect your engine while running, you're going to burn up some electronics as well. Just don't disconnect it

I am talking about an Electric oil injection on a 94 Mercury 2.5L 200. I decided against an Optimax due to the potential repair costs.

Bad link? IE keeps shutting down the site, saying it has a problem?

d, i just tried it & it connected. it's basically the same info jason posted with prices.

jason, i just looked at the radar, you guys are getting hammered. we are still between bands, so we're gonna run out and get the crab traps in and try to be back before the bottom falls out. good luck with the tooth

I just looked out at the boat, no water draining from the sides but water is pouring from the bilge. So the scuppers are clogged and now i have 3" water on deck and its pouring into the bilge. I am going to fix that when i build my bracket and close the transom in.

www.thmarine.com/products/Aeration-and-Plumbing/Drain-Fittings/Scupper-Drains/Large-Rectangular-Scupper

http://i272.photobucket.com/albums/j...la/rain002.jpg

I am now the owner of a 1994 Mercury 2.5L Offshore 200. :clap: Compression was 120 +/- 2psi on all cylinders. All the oil injection was removed and they did not have it. Not sure if i am going to replace all of it and run EOI.

The tilt tube is pretty rusted, and the previous owner took all the latches off the cowling and the seal and used bungee type latches on the cowling. New decals wouldn't hurt but it looks good as is. All in all i think i did ok paying $1200.

On the way home we stopped at Bass Pro and took the dogs in with us for a quick look around. First time i have even been in Bass Pro and i found it crowded.

Right now i am building a stand to run it. It did not come with controls or keys,etc. How do i shut it off once i get it running?

congrats, welcome to the merc fold. i have an old piece of a wiring harness that i hooked up to a generic key switch. it makes it alot easier starting & stopping. i bet bass pro was packed given the weather we've had.

I figured out which terminal in the harness shut it off. :sun:

Motor sound really good. I think i might have upset some neighbors running it at 10:00 at night. :hi:

Put a thread on the local forum to see what some of the dealers can do on a package deal for rigging. As for a prop i have a Rapture 14.25x21. I am thinking its too much pitch.

It had a tee in the water outlet hose that i assume was for water pressure. Should i keep it or just plug it?

As for maintenance i have already replaced the spark plugs, and i plan to change the lower unit oil and water pump, then clean the carbs. Still wondering about the oil injection.

I found that a SS 14.5 x 17 was a good all around prop for my engine (1991 200 hp 2.5 Merc) It pushed my 2500lb 21' Cruisers, Inc at an honest 42-45 mph seemingly effortlessly. I still have that prop on my engine and will be using it when I put the engine on my V21 later this year.

I still have my OEM oil injection hooked up, and it works fine, but truthfully I was going to unhook it and run premix. After seeing that electronic unit I think I'm going to bite the bullet and get one. I figure that $500 is far better than several thousand for a new engine.

since the po had the oil injection disabled, i'd run premix. i would definately have a water pressure guage. it also should have a temp sensor. i would run both. i like the pressure guage because it lets me know a problem is developing. with a new water pump, you should have between 10 to 13 psi @ 4000 rpm. when mine starts only showing 7 to 8, i know i need to change it soon.

I might go ahead and run water pressure, as for water temp the Mercury Flagship gauges only have a C-H type gauge. I would rather have some numbers, but its no big deal.

Looked up parts for rigging, and i bout had a heart attack when i seen the price for a outboard to remote harness $280 for 20'. That might be the only used component i use on rigging if i can find one used.

The Rapture props are no longer made. They have been replaced by "Apollo". The 21 might make a spare. $280 for an Apollo stainless prop. Both Rapture and Apollo are Michigan wheel props.

Destroyer if you decide to run premix i can take that oil injection off your hands. :beer:

Speaking of 225 Optimax on a V - should run 50-55 mph. Nice.

If I decide to go that direction you're first in line.

Jason. I kept thinking about it, turning it over and over in my mind. I like the idea of not having to premix gas, but I hate the thought of living under the "will I lose my engine because of a failed plastic gear" cloud. So
I ordered an electric oil injection unit today. http://www.propelledmarine.com/oil_injection.htm I don't know what, if anything, is or is not required of me to remove from my engine. But if I have to remove the present oil pump are you still interested? :head: My engine is a 1991 Merc 200 2.5L.

I believe the EOI uses the old oil pump.

What we need is a boat mounted 50:1 premix unit. Something that you pour your oil into, and it mixes the oil with the gas at a 50:1 rate, then pours it into a remote 5 gallon fuel tank, which the fuel is then drawn out of by the outboard. The remote 5 gallon tank serves as a backup in case, the unit fails you dont immediately burn your engine up.

Maybe i should patent this idea???

I don't think you can patent just an idea. You have to have a drawing of the unit showing how it works I believe. Still, it's a great idea. Something that would automatically sense when your gas didn't have oil in it and would automatically switch over to the reserve tank of premix. Think of how many hundreds of thousands of dollars in ruined engines would be saved. Still, maybe we shouldn't think too hard about this... It might cut down on Spares and Ferms business... that would be bad for them. (But I love the idea of the automix tank)

from what i understand, it's no the oil pump that is the weak link, it's the plastic gear on the crank.

jason, that is why i carry a spare gallon of oil on the boat, with the v having a 60 gallon tank, if i even think i have a mixing problem, i dump the gallon of oil in the fuel tank. i have only had to do this twice in 18 years, once it was a split hose to the engine tank and the other was a bad oil alert module.
the only bad is sometimes the only symptom you get is when the engine seizes...

something i have thought that would help in sensing oil injection problem was some kind of pressure gauge on the oil tank

Exactly. My engine is a 1991. That's nothing for metal, but it's a lot of years for plastic. Although there's no indication that there's anything wrong with the plastic gear, or any part of my oil injection system, I just don't want to take the chance. $397 is cheap insurance in my book.

I am stuck right now on this idea. I need an investor and somebody good with "electric stuff"

We know that fuel, even with a 100 : 1 mix is different chemically than just straight fuel. There are ways to measure it. Without really thinking about it too much, I think a sensor hooked to a microprocessor that measures the viscosity of the fuel several hundred times a second as it flows past might work. (I think that fuel with oil in it would have a different viscosity index than fuel without oil in it). You just have to monitor the thickness of the fuel. If it falls below a set parameter it would send a signal to a solenoid that would switch a valve to a different tank filled with premix in it and sound an alarm. The problem of course is writting the program. The rest is just basic mechanical stuff.

Personally that is to overdone for me. It only takes a few extra minutes to use a mixing bottle and KNOW the oil is in it. Unfortunately for the DFI guys, this won't work.

I have figured out a way using one pump and the remote tank. Without all the computer stuff. And it is stupid simple. If i had the pump, I can build a prototype with a trip to westmarine.

The factory MERC system works with just one pump, and the module is for nothing but a warning system and doesn't affect the oil injection system in any way.

I was referring to my "automix unit" idea and Destroyers post.

I don't know about all the tech stuff.......but I'd speculated that a new 2012 Opti 225 prop'd just right, and trimmed out will push a clean V21 to about 55 mph, maybe a touch more.

Electric oil injection unit arrived today from Go2Marine. Nicely packaged, looks well made. Will try hooking it up tomorrow if time permits and report on how it works. :party: