ray green

iTrader: (14)

So direct oil metering really is better because it delivers more oil under load conditions? Clever.

If you premix, you need to add more to the premix to cover the full range of demand. The OMP (Oil Metering Pump, duh) meters the oil to suit the engine's needs.

So OMPs save oil, protect the engine better and make less polution.

And 2 cycle oil burns better.

Sounds like it's time for a reservoir under the hood.

t_g_farrell

iTrader: (1)

I just looked thru my parts bin and I have 2 old OMPs laying about. I'm going to
try modding an OMP instead of buying a $90 part to do it. I think pull-apart can
supply a suitable reservoir for minimal cash outlay.

Stevan

iTrader: (17)

Sgt Fox, that is one well done oiling system.

I'm not so sure the MOP changes the ratio, unless I somehow missed some documentation in the countless premixing threads on here. My understanding is it just puts out more oil to maintain the ratio as more fuel pumped in. The ratio can be decreased from 250:1 to 150:1 by adjustment.
Premixing is the same, more fuel = more oil, same ratio.

t_g_farrell

iTrader: (1)

I'm hunting down a donor reservoir now. I started a thread to collect ideas for
finding one at a pull-apart.

https://www.rx7club.com/1st-generation-specific-1979-1985-18/premix-oil-reservoir-recommendations-923063/

DallasFC1

iTrader: (2)

I have an old but good shape cold start assist reservoir and a working 12A OMP. Unless I missed something and its a 13b in which case I have one of those too. I can just send it to ya if you want them. I will not ever use an OMP again. I love premixing. Easy, simple, and done, each fill up. Guess I got used to it


Let me know. HOWEVER I do NOT have the oil lines so you will have to get your own on that deal (honestly I would fine a hydraulic shop and have them make you steel braided rubber OMP lines... they work awesome,,, ask me how i know )

t_g_farrell

iTrader: (1)

Thanks for the offer but the hot start assist is a wee bit smaller than what I need.

I'm ok on MOPs too, I have 2 spares and the one on the car itself.

ray green

iTrader: (14)

I'm stumbling along with the premix until I follow Sarge and Tim's leads and install a reservoir for the OMP but some issues have come up, so let me see what you guys, in your vast experience, would do.

First, the first time I filled the tank I got out my brand new gallon of Wally Mart 2 cycle oil, popped the lid, carefully measured out 16 oz of the pretty blue fluid, struggled to get it all in the tank, replaced the gas cap, fired up the car and drove away with the practically full gallon of my Wally Mart oil and measuring beaker still sitting by the pump. I discovered my error several days later, when I went to fill up again.

So how do you guys remember to not leave your premix and utensils at the gas station?

Second, since I didn't have any Wally Mart oil I used MMO instead on the next fill up, 16 oz the same as I would have with the real 2 cycle oil. I'm just finishing off that tank now but it seems to me that the car has lost some pep compared to the way it was running with the Wally Mart 2 cycle oil.

Could it be that real 2 cycle oil does a better job than the similar (and more expensive) MMO? I still have the other 16 oz of my 32 oz bottle of MMO, but I think I'll stop at Wally World on the way home and pick up some more real 2 cycle oil for the next fill up, just in case.

t_g_farrell

iTrader: (1)

MMO has the word mystery in it for a reason Ray

I think the MMO is not formulated to burn as well or lubricant in the conditions
that 2 cycle oil is, so I would not use it to premix. Might not be the best for
the old thing.

j9fd3s

iTrader: (3)

there is no mystery in MMO, http://www.jamestowndistributors.com...ystery_oil.pdf

there is not much oil in it either....

i haven't forgotten the premix crap yet, i think on the FC it required opening the hatch, and getting into the spare tire area, so its hard to forget too many steps to get it out in the first place

the FB so far, most of the fillups have been from a 5 gallon can. and the one time i did drive it to the gas station (grocery store is next), i decided i was going to get 8 gallons of gas, so i made a little bottle with 8oz of premix, so there was nothing to forget

ray green

iTrader: (14)

OK, no more MMO, I stopped by Walmart on the way home and picked up another gallon of the 2 cycle oil for $10. Then I went to the gas station and focused focused focused on not leaving the oil container sitting by the gas pump when I drove off. It worked this time.

The hard part was the measuring. I had to dig a 20 oz juice container out of the trash barrel and shake it out, then guess where 16 oz would be. I can just see the guys laughing at the security monitors.

I need to scrounge up some good 1 qt. containers with clear markings on the side until Tim comes up with a serviceable oil reservoir.

For the record, the Silver One did seem to be a bit happier for the last ten miles of the ride home, once the two cycle oil kicked in.

mjm4jc

I pour my 2 cycle oil in an empty 1 qt. bottle of Pennzoil. It has a clear strip on the side so you can see the oil, and it is marked every 4 oz. This may be an older bottle of Pennzoil though. Not sure if the newer ones still have that.

ray green

iTrader: (14)

That's what I need. I buy all my oil in the gallon/5 qt containers so I'm low on decent one quart containers with good lines. I'll keep fishing around the trash cans at the gas stations, should be something out there.

Stevan

iTrader: (17)

Sounds like you're putting too much effort into it.
Leave the gallon jug of oil, and a "plastic measuring cup" from the dollar store at home.
Trying to put the oil in the car without depressing the tab in the filler would be a struggle.
Measure the oil at home at your work bench, put it into LONG neck bottles like STP or dry gas. These will depress the tab, and flow in easily. The more bottles you have, the less times you have to refill them. Take a napkin from the dispenser at the pumps(or a rag) to wipe the bottle clean before returning it to your car. Put in the gas
Also, again, putting in oil for a full tank is a pain, it takes too much effort. You have to keep watching the fuel gauge, and try to get it empty as possible with a gas station near by. Use the 8-12 oz bottles, and get gas when it gets bellow around a 1/4 tank or more.
I am probably more forgetful than you Ray, but I've only forgot to bring oil with me twice. I was able to go in the gas station (which mostly all are stores) and get some 2 stroke.

ray green

iTrader: (14)

You make it sound so easy Stevan! This pre-mix routine takes some getting used to, I'll figure it out eventually. My ultimate goal, once I get my act together, is use the 1 quart containers with good markings on the side, that way I can get two fill ups per quart, and maybe have two of those in the car for when I forget to refill.

As far as pressing that flap down, I'm not sure it's really necessary. There are drain ports that bypass the flap to take care of spilled fuel that seem to work pretty well if you just pour the 2 cycle oil into the filler neck at a reasonable rate instead of dumping it in all at once.

Thanks for the tips!

PercentSevenC

Here's my procedure.

I keep a gallon jug of TCW3 behind the driver's seat at all times, so no danger of forgetting. I use a long-neck funnel to pour oil into the single-quart container, then again to pour that into the tank. Then I use gas to wash down the oil remaining in the funnel, then remove it and fill normally. While it's filling, I wipe off the funnel and oil containers with paper towels from the station's dispenser and return them to the car. It's become pretty routine.

t_g_farrell

iTrader: (1)

Ray I get where your coming from.

See us Old Guys have a hard time picking up new routines, so premixing
manually can be a drag. Thats why we like things like a 2 stroke reservoir
that we only fill occasionally.

ray green

iTrader: (14)

I'm with you Tim, but until you get the res system figured out and tell me how to do it, I'm going with this procedure. At least it's been published:

"I keep a gallon jug of TCW3 behind the driver's seat at all times, so no danger of forgetting. I use a long-neck funnel to pour oil into the single-quart container, then again to pour that into the tank. Then I use gas to wash down the oil remaining in the funnel, then remove it and fill normally. While it's filling, I wipe off the funnel and oil containers with paper towels from the station's dispenser and return them to the car. It's become pretty routine. "

JoeNoble

iTrader: (6)

how do you go about checking the omp out put?

t_g_farrell

iTrader: (1)

Try reading the FSM, it has a procedure you can follow to check it out. SgtFox
on here has a nice site with all the FSM for the models years in pdf format.

ray green

iTrader: (14)

Time to bring this post back from the dead.

After doing the premix thing for more than a year now (you know, every time you fill up, pull out the funnel, measure and pour in the 2 cycle oil, rinse everything with gas and dry while the tank is filling) it's getting pretty old. So I'm thinking now is the time to convert to a reservoir, as was discussed earlier in this thread.

I found a reservoir tank that might work, it's a universal coolant overflow tank kit I from autozone for $9.99. It holds 2.5 quarts and I'm guessing it will hold up pretty well with the 2 cycle oil (if not, I'll be looking into the reservoir alternatives that Tim has been looking at).

The big remaining issue is how to adapt the OMP so that it is fed oil from the tank instead of from the engine. The rotary aviation product seems too expensive for such a minor modifications but all the alternatives I've been able to find (basically tapping into the OMP itself to feed the oil) have not been very well tested.

So the question is: What is the best way to adapt the OMP for an external oil supply?

Here's my $9.99 reservoir kit:



Any suggestions and shared experiences are much appreciated!

JoeNoble

iTrader: (6)

Pineapple racing sells a kit

smellycat

I just add a little bottle of 2stroke when I fill up. I still have the oil pump hooked up. I can't tell if the oem pump is doing anything or not. I need to up mr dosage x4

Psychomantis

iTrader: (1)

Where is the omp located and how do i test it?

craaaazzy

iTrader: (9)

ray, return the coolant tank and get a used 2stroke tank from ebay (motorcycle, jetski, snowmobile, etc). i've read of people having issues w/ coolant tank cause it's a different type of plastic used which is not compatible w/ oil.

btw, i have modified my OMP and can clearly see that 2stroke oil is being delivered.

GLC13B

I'm with Luis on this one...I've used and still use the Walmart Tcw3 and it works great. After several engine tear downs, i'm sold this product.