Sea Foam In Oil Injection Tank?

[crappie14]

Have a 1990 Mariner 75 HP with oil injection tank mounted on engine. Oil injection is direct drive with no motion sensor to alert to failure. I am going to disconnect and premix fuel with plans to disable the injector. Anyone ever tried draining the oil tank, refilling it with Sea Foam and running premix fuel. Only thought on this is if I left the injector system intact I would know somewhere down the road if it quit and would give option to easily go back to injected oil me or later owner desired to.

How flamable is Sea Foam and would the thinner liquid meter still meter at the 50:1 / 80:1 rate. If the engine performs the same on premix fuel and there are not any issues I could always disable the injector later. I did research the flash point of Sea Foam and know that it ships as an ORM-D item.

I read a post sometime back where someone was putting premix fuel in the tank to do the same thing however that seemed like an accident waiting to happen.

I know that if I or anyone else got confused and didn't premix the fuel the engine would be toast. I want to try running premix before totally removing the injector.

Any thoughts as to damage it might do?

 

[sschefer]

Re: Sea Foam In Oil Injection Tank?

I'd be concerned that the pump would burn up without the lubrication and I don't think you can adjust that pump to pass the small amount of SeaFoam that you would want to be mixed in. I can't remember exactly but I think it's 8 oz for every 10 gals of fuel and oil at 50:1 would be 26 oz per 10 gals. I think instead of a fuel system cleaner you'd have a stripper.

 

[Jacket4life]

Re: Sea Foam In Oil Injection Tank?

Sea Foam can says 1 ounce per gallon for maintenance. I agree with sscheffer, though, just doesn't "seem" like a good idea to me. If it starts running straight Sea Foam through there all the time, you could create more issues than you are trying to solve. Plus, I can tell you from doing a decarb, it will run like crap if it's getting a lot of Sea Foam all the time.

 

[Outsider]

Re: Sea Foam In Oil Injection Tank?

The bigger question is 'how' does this motor inject oil. Is it atomized with fuel, and thus enters the combustion chamber, or is it direct injection into the crankcase? Either way, injection is designed for a specific mix ratio; not likely it could be easily altered for a much lower ratio of Seafoam ...

 

[sschefer]

Re: Sea Foam In Oil Injection Tank?

Sea Foam can says 1 ounce per gallon for maintenance. I agree with sscheffer, though, just doesn't "seem" like a good idea to me. If it starts running straight Sea Foam through there all the time, you could create more issues than you are trying to solve. Plus, I can tell you from doing a decarb, it will run like crap if it's getting a lot of Sea Foam all the time.

I think you could probably get that pump idled down to the right amount if you reversed the linkage. I know of instances where that's burnt a few motors up. But that pump would be turning on something the equivalent of solvent and passing very little at at time. I think the heat build up would cause the pump to fail and lock up. That would tear up the driving gear on the crank and destroy # 2 cylinder.

I think I'd just store a couple of cans in the ditch bag and add it to the fuel as needed. It would be a good fire starter to have in your ditch bag and has enough alcohol in it to be an emergency antiseptic.

 

[Faztbullet]

Re: Sea Foam In Oil Injection Tank?

I have a commercial mussel fisherman that does exactly what you want to do with a 75 Merc. All you need to do is remove linkage from carb to pump, remove 10mm nut on oil pump,reverse lock washer,align cam with first notch and tighten down to lock it in place. The mixture will be introduced into fuel pump along with your premix fuel and the oil gear is on bottom of crank and if pump does fail it just usually gets bottom bearing or drive coupler. A tank will usually last about a month with with his usage.

 

[gss036]

Re: Sea Foam In Oil Injection Tank?

I think putting SeaFoam in the oil tank is recipe for disaster for your motor. You would be much safe just adding it to a premix. Mixing SeaFoam in oil of 4 stroke motor of a vehicle is entirely different than a 2 stroke. I used SeaFoam for 20 years in my 200 hp Mercury with good results, finally lost a ring that hung up and really dinged one cylinder and the head, so I switched over to to a 225 Honda. Best move I ever made.