ULTRASONIC CLEANING

[Chipg1956]

Simple Greene Extreme FAA approved for cleaning aluminum airplanes. I mix it about 12/1.

 

[Forest#2]

it's the adjustable type...will check governor, but when it surges it seems to puff a wisp of black smoke

You say:

it seems to puff a wisp of black smoke

Wondering if the wisp of black smoke starts the surging or ??
Wisp of black smoke, intake valve guide??
Make sure you have a good new properly spark plug.
Try holding the carb throttle steady at different rpm's so as to defeat/disable the governor. I see in one of your posts where you indicate it also surges/hunts at low speed or idle. Try adding little bit of choke gradually and see if it tries to get smoother. If it does it's running lean, too much air, not enough fuel. (due to air leak or restricted fuel delivery)

Take note if it idles really good at slow rpms and then if it idles slow really good start opening the throttle manually and when the rpm's get fast just hold it and see if it ever puffs any black smoke.

I've seen those Tecumseh adjustable jet carbs that the H jet on the bottom of the bowl would be very critical of proper adjustment from cold to warm engine, 1/8 turn in too far would get cold surges. The H jet is usually very responsive to fast rpm adjustment also. (usually a range of about 1 1/4 to 1 3/4 turns out but 1/4 turn in/out can be critical) Also make sure the little flat washer (that usually get lost) is on the bottom of the H jet spring or the spring will chew the little sealing o ring and the H jet WILL HAVE the annoying slow fuel drip.
Take care of that Adj jet Tecumseh carb, they are few and far between.
The replacements carbs are usually the non-adjustable lean surging and hunting type. (fixed jet)

Is that the points condenser type engine or the electronic magneto type.
Engine ID info posted would help.

Did you try the 8 hp carb?

I'm beginning to suspect it's not the carb.

 

[Earthquake Landscaping]

An ultra sonic cleaner, is only as good as the power it makes. Also, ( and I'm not 100% sure ), power and total volume of fluid matters. I've got two US cleaners, both home made. The "small" one, will hold a carb, and not much else. It's a small aluminium bus pan kind of thing.. less than a quart capacity. I made it with Ebay parts, but it's 100 watts, in a small space. JB weld hold the transducer against the tub. For bigger stuff, I've got a shallow aluminium bus pan, but underneath, 4 100 watt transducers, and two driver boards to power it. Both work great.
As far as I know.. Any US, will work .. eventually, if it's a lower powered unit. Higher power just means quicker results. A lot of Amazon stuff is only 20 to 35 watts. They will work, but will take longer.
As far as cleaning fluid? A splash of Dawn.. No more than that, because water is ( basically) a non compressible fluid. You want to keep whatever is in the cleaning tank, as close to non compressible as possible. The cleaning waves can't propagate properly in a fluid that can be compressed.

 

[Brewboy]

I'm not familiar with the Pro solution, but I would think the regular Simple Green would work well.

 

[Johner]

OK, enough!! 3rd time with this Tecumseh 9hp carb is too much. still will not run right, surging... cant adjust it out under load or low speed, checked needle and seat with vacuum pump after reassembly... held vacuum for as long as i left it.new carb abd intake gaskets so i am assuming no air leaks, i have another carb off an 8hp blower ,, think ill clean that one up and give it a try. if jet sizes are smaller, i do have jet drills and a pin vise, will compare them before i do anything out in left field . this is the wrong forum, but its a NOMA snowblower, 9/27.

Some times the UC can not clean the jets under the little caps, some have check valves in them. Did you change the tank filter? a very small screen in the 2 cycles need cleaning. Right now I use Dove soap it does not eat the aluminum, . You might have an air leak. The UC does a better job if the fluid is circulated with a small pump. Some people use a combo. of cleaners.

 

[Johner]

An ultra sonic cleaner, is only as good as the power it makes. Also, ( and I'm not 100% sure ), power and total volume of fluid matters. I've got two US cleaners, both home made. The "small" one, will hold a carb, and not much else. It's a small aluminium bus pan kind of thing.. less than a quart capacity. I made it with Ebay parts, but it's 100 watts, in a small space. JB weld hold the transducer against the tub. For bigger stuff, I've got a shallow aluminium bus pan, but underneath, 4 100 watt transducers, and two driver boards to power it. Both work great.
As far as I know.. Any US, will work .. eventually, if it's a lower powered unit. Higher power just means quicker results. A lot of Amazon stuff is only 20 to 35 watts. They will work, but will take longer.
As far as cleaning fluid? A splash of Dawn.. No more than that, because water is ( basically) a non compressible fluid. You want to keep whatever is in the cleaning tank, as close to non compressible as possible. The cleaning waves can't propagate properly in a fluid that can be compressed.

That is a good explanation , I will try less soap.

 

[Johner]

cans are 2 yr old plastic. sealed,,,and they sit inside garage yr round. and as i said, same problem after ultra sonic cleaning and re assembly

Do you use a stabilizer, it is a must plus 89 octane a must for 2 cycle, I use stable marine brand all year, 1 oz per gal. eliminated 95% of fuel problems. Stabilizers do not absorb much water, the fumes push fresh air.

 

[thehill]

just looking for a few opinions, i have an ultra sonic cleaner i bought from Harbor freight... ( dont laugh please) it works pretty well i think, sometimes after 2 cleanings for stubborn dirt. i bought the solvent from harbor freight... what kind of cleaners do ya all use ?? im thinking of trying Dawn dish detergent.

On carbs I use Gas.

 

[outdoorpowermike]

I use a 2 qt. cleaner. I fill with water to fill line then add 1 cut of Purple Power and 1 shot of Dawn. I always clean carbs, nut/bolts etc before dipping them in cleaner, just with some carb cleaner or 2+2, then blow off dirt. I use heater at 80 degrees. Cleans nice. Don't over dose with Purple or you will bleach the aluminum on carbs but they still work good but a darker gray color.

 

[jes_in_sac]

When I managed a large liquid nitrogen and oxygen production plant, we had to completely clean and degrease everything going into oxygen service, then blacklight it ensure there was no oil/grease residue anywhere on it. 1:1:1 Trichloroethane used to be the preferred way, but when it was no longer available, the approved NASA and industrial standard method was Simple Green. In my farm ultrasonic cleaner, what I use depends upon what I'm cleaning. It the stuff if dirty, and I know I'm going to be throwing the cleaning solution away, then I use Dawn. If the item being cleaned is basically clean, but you're just trying to get into the places you normally can't get to, then I use Simple Green, or something similar. And yes, hot water definitely helps. For small items, I put them in a beaker or sealed jar in the ultrasonic cleaner with water in the tank, and with more concentrated Simple Green, non-residue degreaser, or even electronic grade 99.9% alcohol in the beaker or jar. Yes, the ultrasonic waves will pass through the water in the tank, through the glass, and into the solution in your small container. After cleaning, an air gun with replaceable needle tips on it is great for drying out the passages of whatever you cleaned, but just make sure you run your compressed air through a good commercial filter to remove oil and water from the air.