Never seen an oil filter fall apart before, wherever you buy the oil filters from just make sure they don’t have a paper element in them. I’m looking forward to seeing the synopsis from the oil pump testing and dissection. Nice work
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1997 GTX off season rebuild start.
- Thread starter AquaEye
- Start date
Looked on the Summit, Jegs website. (Kaiser Air Co also has several for screw compressors.) dedicated to just oil/gas filtration. There are several inline's out there available. "Smallish" screw top aluminum housing with some coming with interchangeable micron filters or replacements (no paper media) with varying size in/out openings capable of filtering the Andromeda strain. Prices range from $60ish up to the low/mid hundreds.
That's happening.
p.s. Editing the YT video will take as much time as the bench test itself, Going to try split screen...maybe.
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Had a concern this morning about oil free flowing from the pump with no rotation.
Conferred with mikidymac about & informed me of a check valve located @ the port. The YT video reveals the cracking pressure of this particular pump port(s). Used air pressure @ first followed by using oil. Turned out to be one slippery mess so I posted the "cleaner" endeavor. Cracking pressure remain un-changed with or w/o.
More to come, a lot more...
Conferred with mikidymac about & informed me of a check valve located @ the port. The YT video reveals the cracking pressure of this particular pump port(s). Used air pressure @ first followed by using oil. Turned out to be one slippery mess so I posted the "cleaner" endeavor. Cracking pressure remain un-changed with or w/o.
1997 Sea Doo 787 oil injection nozzle cracking pressure re-visited.
www.youtube.com/watch?v=qGwXxst1blg
www.youtube.com/watch?v=0CqpJL7eSds
One or two more manifolds to be purchased, tested so as to establish a rudimentary pattern in a sample of 4/5, if any. Circulate solvent in closed loop in "problem(?)" ports,( *windshield washer motor) removal>dissection of port(s) if necessary. Heat & dry ice=pop goes the weasel.
Again with the oil pumps even though the bench testing has yet to occur. Currently have 3 pumps that "work", capabilities @ setpoints/RPMs TBD.
Two more pumps should provide a reasonable sampling for "rudimentary pattern" to establish.
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*Going to use electric fuel pump out of a FORD instead of washer motor out of a dODgE for closed loop circulation.
Fire Marshall has been alerted to my endeavor.
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No change, nada, ziltch. No vacuum held whatsoever. Cracking pressure remained unchanged. 2/3ish psi.
Heat along with dry ice, remove ports, split caps & see what the heck this is all about.
I’m not sure where to start, I’m interested in your findings but find it difficult to follow where you are at?. I will go back through the thread some evening to see exactly what you were looking for. I’m hoping for a synopsis at the end of the testing. The check valves are in the intake manifold correct? They open with roughly 3 psi of pressure? Did you find some that weren’t closing or opening properly? And are cleaning them with this closed loop system?
I'll try to condense & make a little bit of sense, I'm kind of all over the map on this. My first oil injected two stroke so bear with me.
It started off with the engine noise thread. No mystery there= rebuild.
Premixing since day one starting in early 80s. Today, I'm tired of it. My days of "On water, fast is not fast enough" are over(chiropractic bills).
If I'm going to rebuild to the full measure, I need that confidence in the oil injection system. I'm convinced that the oil pump is bullet proof, no mystery there. Mikuni makes a good product, but what I'm not convinced of is the amounts delivered @ certain RPM's.
I putt ,cruise, leisurely take my time. Very few times I let the badger loose. The low/mid RPM area is what I'm scrutinizing.
Every facet of operation of the lubrication system from tank to port is to be scrutinized/validated & if need be, improved.
I'm not going back to premix. Need validation of amounts delivered, full measure & I have the time/resources to do just such.
This "discovery" endeavor is for my peace of mind & with the outstanding info of what the members have shared here, I've decided to invite everyone along. ( Remember Willy Wonka's boat ride? kinda like that.)
Sometimes I can be clear as mud but I hope this helps.
I find what your doing very interesting, I too sometimes worry about how much oil my machines are getting while at idle, only because where I normally launch there is a fairly lengthy no wake zone. They spew a ton of smoke while I’m idling out to the river so I’m pretty confident they are getting lots of oil but I do still worry, coming back in through the same no wake zone, no smoke. Hope you don’t mind if I ask the odd question? Where the small oil lines fit onto the intake manifold, is there check valves there? Do they open with 3 pounds of pressure? That’s what I’m gathering from your posts?
That's odd, I noticed the same of a oil injected GTX launching this year @ the ramp. Smoked like nobody's business but later that afternoon, nothing. Clean & clear. Maybe case was loaded up with oil before startup? Check valve issue? Oil dissipated from case throughout day?
As the video shows location of inj ports they do have a check valve inside each one. probably ball bearing along with spring. The #1 (40.3 hr) manifold had a consistent, solid 4/5 lb cracking pressure ( The previous owner religiously used syn Sea Doo oil, documented), the #2 manifold (unknown hrs) had a consistent 2ish+ lb cracking pressure. Also the #2 manifold had a vivid blue oil that I purged out when I received it. As far as the vacuum & the lack there of on #2, that it might(?) be giving a clue of the "general" health/integrity of operational design. Kinda of like trouble is developing down the pipeline but not quite there...yet, sorta(?) Frankly. I just don't know. I reckon it's more important that the port opens when in operation rather than seal while off. Don't like that scenario, nope.
But as I'm getting another manifold & pump to increase the sampling size (SPC) I should be able to reach a "middle ground" on determinations.
Or not.
Then on to the test bench with 4 or 5 pumps & make determinations there.
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It’s great that you are increasing your sample size, the 4 or 5 pounds it takes to crack the check valves on manifold 1 would concern me with manifold 2 cracking at 2 pounds. It would be interesting to know what force the oil pump puts out, was the pump able to open the check valves on manifold 1?
Well the oil tank is only about 12" above the pump so with pressure being 2.31' per psi you would only need 0.5 psi holding from the check valves from draining the tank into the crankcase. Now if the check valve on the tank vent doesn't work then you could build enough tank pressure to overcome the check-balls.
As far as a cold ski smoking at the ramp, yes residual oil in the crankcase from the last time it ran will smoke at first cold start. Also a choked cold engine will not have complete combustion so more smoke. And someone that religiously fogs their engine after every ride will smoke even more at the ramp at the start of the day. Yes, there are no mosquitos at my ramp in the morning and I get a lot of strange looks from all my fogging oil burning off like there is a fire about to start, LOL. So not all oil smoke at cold start is a sign of anything wrong on a 2-stroke.
As far as a cold ski smoking at the ramp, yes residual oil in the crankcase from the last time it ran will smoke at first cold start. Also a choked cold engine will not have complete combustion so more smoke. And someone that religiously fogs their engine after every ride will smoke even more at the ramp at the start of the day. Yes, there are no mosquitos at my ramp in the morning and I get a lot of strange looks from all my fogging oil burning off like there is a fire about to start, LOL. So not all oil smoke at cold start is a sign of anything wrong on a 2-stroke.
All my machines smoke when cold. As I’m idling out of the no wake zone I’m usually apologizing to people for all the smoke sitting in their docked boats or in their boat houses.
I love the smell of 2-strokes in the morning. Unlike napalm.
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