Injector Cleaning II

[oldboat1]

The only outboards I've owned or worked on have been old or pretty old carb models. But having said that, I've driven a couple of '80s Mercedes diesels for years. I don't work on them, but the mechanic who has kept them tip-top for years recommended addition of about 6 oz. of ATF with every fill-up to insure clean injectors. I have periodically done that, and have never had injector issues -- although that doesn't prove it was the ATF, of course. But for 2-cycle outboards with injectors, it strikes me that addition of some small quantity of ATF per tankful might be helpful. Maybe that could be OK with 4-cycle motors as well, but would want some professional assurances for that, I guess.

 

[boobie]

Re: Injector Cleaning II

That ATF does wonders with the correct amount in any motor. If you have stuck lifters in an inboard motor it even cures them.

 

[oldboat1]

Re: Injector Cleaning II

thanks, boobie. was thinking I might add some to the gas tank of my old 305 this spring ('80 Trojan F26) -- might do some good.

 

[nwcove]

Re: Injector Cleaning II

not sure i'd try that on anything with o2 sensors, and have never heard of atf being added to the fuel. have dripped atf into carbs tho.. on sbc's. then followed that up with dripping distilled water into the carb.

 

[oldboat1]

Re: Injector Cleaning II

yup. just thinking -- good point about O2 sensors (wouldn't apply to my old 305). On the other hand, there are lots of gas additives that are routinely used, and it seems to me that a little ATF wouldn't be any more harmful than that stuff(?)

This could probably go over to the inboard discussion board, but I'm thinking that judicious use of ATF would be good for 2-cycle injector motors, at least -- the older Evinrudes? It may be that good TCW3 2-cyle oil is all that is needed, but maybe a few ounces of ATF now and then would be useful.

 

[clanton]

Re: Injector Cleaning II

The oil BPR has for the E-Tecs has a injector cleaner in the oil, some of the oil is pumped thru the injectors.

 

[oldboat1]

Re: Injector Cleaning II

interesting. So kind of conversely, would that E-Tec oil with the injector cleaner be a good idea for all 2-cycles, including carbs?

 

[clanton]

Re: Injector Cleaning II

I don`t know, kinda pricey. I would use Sea Foam for the Carb models, 2 and 4 stroke. Sea-Foam ok for some 4 stroke injectors.

 

[aerobat]

Re: Injector Cleaning II

The oil BPR has for the E-Tecs has a injector cleaner in the oil, some of the oil is pumped thru the injectors.

:faint2:

do you have any prove or source for that ??? due to my knowledge an etec pumps only pure gas thru the injectors, there is not a droplet of oil in it and the injectors are not connected to the oiling system ... oiling is done thru a distibution system directly to the parts that need lubrication and oil is never mixed with fuel.

 

[Faztbullet]

Re: Injector Cleaning II

do you have any prove or source for that ??? due to my knowledge an etec pumps only pure gas thru the injectors, there is not a droplet of oil in it and the injectors are not connected to the oiling system ... oiling is done thru a distibution system directly to the parts that need lubrication and oil is never mixed with fuel.

Read your FACTORY manual as the under the oil distribution manifold...quoted from FACTORY manual 787063 page 3-17..
"4 or 6 hoses supply oil to the cylinders on the port and starboard sides of block. Another hose supplies oil, thru a check valve, to the fuel lift pump. This reduces carbon buildup on the fuel injection poppet valves. Thus oil is injected into fuel.You can also count the oil lines off the injector pumps as there is usually 7 for a V-6.

 

[boobie]

Re: Injector Cleaning II

Fatz,what year is that manual from ??

 

[Fed]

Re: Injector Cleaning II

Another hose supplies oil, thru a check valve, to the fuel lift pump. This reduces carbon buildup on the fuel injection poppet valves.

Could it be lube for the lift pump and reduces carbon build up because there is no oil in the fuel?
I could read that quote from the manual a couple of different ways.

I have no idea how the oiling system on an etec works, just chucking it in for discussion.

 

[Faztbullet]

Re: Injector Cleaning II

fatz,what year is that manual from ??

2000 ss

 

[boobie]

Re: Injector Cleaning II

I remember reading some place that BRP stopped injecting oil into the fuel system. Will have to do some research.

 

[seahorse5]

Re: Injector Cleaning II

The oil BPR has for the E-Tecs has a injector cleaner in the oil, some of the oil is pumped thru the injectors.

The very early E-TECs did that but since around 2008 or so depending on the model no oil goes into the fuel system and the injector design was improved.

 

[aerobat]

Re: Injector Cleaning II

thanks seahorse - thats also my knowledge on the stuff and i was a little bit confused.

afaik on an example of a v6 etec there are 7 hoses on the primary distributor where 6 go into the crankshaft bearings and the seventh hose goes into the secondary distributor where again 6 hoses go to the cylinder sleeves. so a V6 etec has 12 oiling points and 13 hoses where the additional hose connects the two oiling distributors. there is no connection between the oil and fuel system and oil is in not mixed with fuel at any time on a current etec.