Oil injection bypass

[buckeye_paul]

I finally got around to bypassing the oil injection today. I have the 210 motor. I was a very easy conversion and I got the parts for $18 shipped. I left the tanks in place and plugged the hoses. Instead of cutting wires to bypass the low oil sensor, I took a piece of rubber hose and split it lengthwise then I zip tied it around the stem of the sensor. That way the float is always up. By leaving almost everything in place, if want to sell my boat I can always change it back without much trouble.
Now that I've seen the oil pump assembly, I'm really glad I did this. Not only is the gear on the crankshaft a failure point, it looks like the linkage between the pump and the throttle could easily fail. The end caps of the link arm are plastic. The pump itself by design could also fail. Nothing about this system is fail proof. Mixing the oil into the gas tank is the only sure way to prevent engine damage due to non-lubrication.

One unexpected thing happened. The check valve in the fuel line that is supposed to allow oil in and not let fuel out, was not working. When I pulled the oil line, fuel spilled into the bilge. I plugged the hose with a bolt and zip tied it so it won't leak or come out.

I now have piece of mind. I can go out and have fun now.

For anyone who is interested, here are the parts I used:

Got everything from www.boats.net

Qty 1 of 43453 Plastic Plug (block off plug)
Qty 1 of 22-73379 Plug (crankcase pressure to main oil tank)
Qty 2 of 10-41506 Screw (for block off plug)
Qty 1 of 25-32509 or 32509 O ring (for block off plug)


Next project: Trim plate from Tim Place.

 

[Dr Honda]

Thanks for the heads up on that.

As you may know... I have an Islandia project with a blown engine. I was very surprised to find the worm gear with ZERO wear on it. It looks new. So... who knows how/why the gear gives out.

 

[challenger01]

I guess I better consider a premix change over as well. I have a 2001 240efi, and I suspect low hours since I know the previous owner, but the failures all seem to be hitting around 10-12 years.


Do you have any pics you can post of the changes you made? I keep my boat at a storage location over the summer so I would have to be able to make the changes in a parking lot. Are there any special tools or concerns?
How are you premixing? I assume we would need to mix in accessory 5 gallon containers, or is there a safe way to add the proper ratio to the main tank?

Aside from some inconvenience in filling, and extra oil use due to not having the variable use rates are there any other concerns with going premix?

Thanks

 

[Mayerichm]

Granted it's not the most accurate, but I always dump 12.5oz of oil into the main tank, then add 5 gallons of fuel. Just keep repeating this procedure until it's full. if you know you're almost full, just do 6.25oz to 2.5 gal. The final goal is to end up with 50:1, but I'd rather run more oil than not enough. By adding the gas to the oil, it'll mix up; also sloshing around while driving will help.

 

[buckeye_paul]

premix

I guess I better consider a premix change over as well. I have a 2001 240efi, and I suspect low hours since I know the previous owner, but the failures all seem to be hitting around 10-12 years.


Do you have any pics you can post of the changes you made? I keep my boat at a storage location over the summer so I would have to be able to make the changes in a parking lot. Are there any special tools or concerns?
How are you premixing? I assume we would need to mix in accessory 5 gallon containers, or is there a safe way to add the proper ratio to the main tank?

Aside from some inconvenience in filling, and extra oil use due to not having the variable use rates are there any other concerns with going premix?

Thanks

Sorry I didn't take any pictures. Go to screamandfly.com the procedure is in there somewhere. You'll need the parts, a small ratchet set with extension, standard allen keys, side cutters for cutting zip ties, some replacement zip ties, and a small adjustable wrench. The graduated oil mix bottle I have goes up to 10 gals of fuel. I put 1 bottle of oil in the tank, then 10 gals of gas, then repeat, etc.. By the time I get to the ramp it's mixed up.

 

[igneous]

There are many oil /gas ratio calculators online and even an iphone app. There are 128oz in a gallon so if u want a 50:1 ratio you'd use 102.4 ounces per 40 gallons of fuel. That's basically 80% (or 4/5ths) of a gallon jug. Small scale- it's 2.56 ounces of oil per gallon of fuel.
Buckeye paul, how is the smoking at idle?

 

[bhatch21]

Is anybody pre-mixing their fuel for an EFI motor, or is it just the carb models? Would the oil clog the injectors or mess up the fuel rail?

 

[Dr Honda]

Is anybody pre-mixing their fuel for an EFI motor, or is it just the carb models? Would the oil clog the injectors or mess up the fuel rail?

No. And actually... at 40:1... it will just help lube the fuel pump, and injectors.

 

[buckeye_paul]

Smoke!

There are many oil /gas ratio calculators online and even an iphone app. There are 128oz in a gallon so if u want a 50:1 ratio you'd use 102.4 ounces per 40 gallons of fuel. That's basically 80% (or 4/5ths) of a gallon jug. Small scale- it's 2.56 ounces of oil per gallon of fuel.
Buckeye paul, how is the smoking at idle?

Yesterday was the first day I got it in the water. There was way more smoke than I would like at idle. I'm sure it's because I underestimated the amount of gasoline I had in the tank before the bypass. Plus I put in some extra oil just to be safe. Next fill up I'm going to keep it right at 50:1 and see how that goes. I still have about a quarter tank so it might be a bit rich for awhile. As far as performance goes, the boat ran great and I wasn't nervous about the oil injection.

Peace

 

[buckeye_paul]

Mayerichm,

How long have you been doing premix? Have you had any problems? Any performance issues? Do you go through a lot more oil?
Just wondering because a lot of people talk about going premix but I have yet to talk to someone on this site who did it.

Thanks

 

[igneous]

Yeah, 40:1 is easier if you have a 40 gal. tank. Just thinking that might smoke alot at idle and foul plugs.
GO DEVILS !!

 

[buckeye_paul]

40:1 ?

Yeah, 40:1 is easier if you have a 40 gal. tank. Just thinking that might smoke alot at idle and foul plugs.
GO DEVILS !!

Where did the 40:1 come from? I'm 100% sure the recommended ratio for my motor is 50:1 at WOT and I don't plan on going anything less that WOT unless grandma's in the boat. I've seen in the racing posts where they run 40:1 and maybe the 240 is too? :drool5:

 

[igneous]

Dr honda suggests 40:1, but the manual says 50, so I'll stick with that to keep idle smoking down. 40:1 is for high performance racing engines. 50:1 should lube everthing. When I filled up I opened cover and marked lines on tank at 10 gal. intervals. Gas came out of side vent at 40 gal.

 

[Dr Honda]

my mistake guys. I'm so use to typing 40:1 for the Rotax engines... that's what happened. (Even though, I read 50:1 on your post)

 

[Mayerichm]

Mayerichm,

How long have you been doing premix? Have you had any problems? Any performance issues? Do you go through a lot more oil?
Just wondering because a lot of people talk about going premix but I have yet to talk to someone on this site who did it.

Thanks

Yes I'm running premix on a 240efi. It smokes like a freight train at the ramp, but it's worth the piece of mind. I'm also going to replace the temp sensor in case that may be having a hand in the issue. But I vary the mix between 40:1 and 50:1 so I am using more oil, but how much oil can you go thru to equal the cost of a powerhead?

 

[buckeye_paul]

I agree

Yes I'm running premix on a 240efi. It smokes like a freight train at the ramp, but it's worth the piece of mind. I'm also going to replace the temp sensor in case that may be having a hand in the issue. But I vary the mix between 40:1 and 50:1 so I am using more oil, but how much oil can you go thru to equal the cost of a powerhead?

Thanks for the feedback,

I agree about the cost of a rebuild versus some extra oil. What brand of oil are you using? I found Pennzoil Marine synthetic blend TCW3 at WalMart for $16.50 a gallon. I jumped all over it and bought 5 gallons. I was buying the Quicksilver Premium Plus for $29. The Pennzoil states that it exceeds Mercury specifications.

Peace

 

[Mayerichm]

Yeah I've been using the same Pennz. I'm sure that the Quicksilver is better, but since my boat isn't ever gonna see a mix leaner than 50:1 I'm not too concerned about it. Biggest problem for me is that I don't have a merc dealer or boat shop within two hours of where I live, so walmart is about as close as I can get. I order all my parts online, but I refuse to pay shipping on oil.

 

[buckeye_paul]

UPDATE--
Second weekend since bypassing the oil injection. Engine running well, very well. Not as much smoke since I used up that first tank. Now it's strictly 50:1. Glad I did it!

 

[challenger01]

Glad to hear the bypass worked. I have not had a chance to do the conversion yet. Does anybody know if the same parts buckeyepaul used will work in 240I efi?

If anybody has a photo to post or specific instructions for 240 bypass it would be greatly appreciated. My engine has been running well the last few weekends but the linkage failure is always in the back of my mind.

Thanks,
Brian

 

[buckeye_paul]

Parts

Glad to hear the bypass worked. I have not had a chance to do the conversion yet. Does anybody know if the same parts buckeyepaul used will work in 240I efi?

If anybody has a photo to post or specific instructions for 240 bypass it would be greatly appreciated. My engine has been running well the last few weekends but the linkage failure is always in the back of my mind.

Thanks,
Brian

I'm sure the parts are the same. It's the same engine, same oil injection system, different fuel delivery.

 

[Mayerichm]

Just take off the pump, remove the driveshaft and bushing, then reinstall the pump. Boom, that's it.

 

[buckeye_paul]

I just wanted to give an update. So far I'm very happy with my decision to premix. I've been doing it a couple of months now and I'd guess I've gone through close to 200 gals of fuel/oil mix so far. It's not complicated, I keep a long neck funnel, a graduated mixing bottle, a couple gallons of oil, and a bottle of Stabil in my truck. When fill up, I put 10 gals. in at a time, then put the oil in with the funnel, then repeat until full. Not hard at all. Considering the consequence of an oil injection failure, this was a no brainer for me.

 

[go-hokies]

Agree.... I do the same routine... Adds about 5 minutes to the fill up process but then I am ready to go with 40 gallons with one less thing to worry about.

 

[500whp335i]

Just take off the pump, remove the driveshaft and bushing, then reinstall the pump. Boom, that's it.

im looking to do this since my 240 m2 is smoking at idle from too much oil and dont feel like tinkering with it... thats literally all you have to do?

 

[Mayerichm]

That is all I did, however my boat has gradually started smoking more and more through the summer but I don't think it's related to the bypass. I think I have injector or compression issues, the boat doesn't want to start in the water even though the idle is set to 1k rpm. I'm just trying to limp it along until fall so I can tear into it.

But as far as the injection goes, After doing premix, I'd never go back. As long as its getting oil, everything else is an easy fix.