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Earlier today, I removed & repl'd the water pump in my new RR Racer w/Linhai 257cc eng. Upon removal of the water pump oil started draining out of the well were the pump sat in. I assumed this was normal as the bearing of the pump are continually lubricated. My ques. is was that transmission/gear oil fluid that
ran out or was it engine crankcase oil? There is less than 300 miles on this engine and I'm not totally familiar with all of the fluids yet. It seems to have the color and consistency of 10W30 oil and not that of the typical 75W80 typical gear oil.
I checked the eng oil dip stick and it showed full. Approx 1/2 qt or less ran out and drained into my catch pan.

I would appreciate any clarification on which oil this was than drained out of the water pump well.

Thanks in advance,

Ernie

Thanks for your input. Originally my fan was blowing out towards the front of the Scoot. Later I reversed the dc wiring and it blew correctly (blowing over the radiator front to rear). Since then I removed that fan which was high current and low air velocity. I replaced it with twin 4.5in 850 cfm fans mtd side-by-side running constantly thru an off/on switch should I decide to shut down the fans. It is the best cooling I have had so far but sure enough after I run about 5-6 miles the overheat condition returns with the needle all the way to the right of the "H" mark on the temp gauge. It's loaded up with 50/50 Dexcool antifreeze and perhaps I should retry the burping routines but previously, I burped the eng so much that I thought I would be soon wearing out the drain plug at the water pump. thanks again, ern

Can you tell me which temp sensor this unit is that is located on the lower left of the radiator? On the engine there is a sensor tapped in just to the left of the intake manifold. If that is the temp sensor, what would this one on the bottom of the radiator be used for?
Thanks,
Ern

Any higher up and the radiator would have been in the instrument cluster.

Radiator output vents shown under the hand grips.

Today I successfully located a lower temp thermostat (72 deg C - 161.6 F) Installed and sealed well and test rode the scoot with the headlight cowling intact. Outside temp was approx 65deg F. Test road at 45mph for approx 5 miles and at the 5mi period the temp gauge has rose just a small indication to the left of "H" but still in the white and not the red. This proves that the eng will run cooler with the thermostat installed as opposed to being removed. I'll post a photo of the scoot and front end so you can see the very skimpy 3 little louvers that I don't believe can let enough of fresh air into the radiator intake & fan. Any additional suggestions will be gratefully rcv'd by myself and the other guy, (Jerry) with the same scoot as mine and enduring the same hi temp probs. I think that the solution in my case will be to cut out an area of the fiberglass cowling just in front of the radiator location and either buy or fabricate a fiberglass air scoop or air intake vent device similar to car owner's using the hi-rise intake manifolds used by auto enthusiasts of past decades to direct the flow of air to the carb(s) or fuel injection. The chain car part stores don't stock them any longer, ie advance, Auto-Zone, O'Reillys, I haven't checked Pep Boys yet. May have to go to the Harley dealer or Honda motorcycle shop who might have something or be relegated to the fiberglass & resin cans.
Thanks again Doc,
Ernie

I ran the eng up to mid temp; via riding it around the block a couple of 3 times, let it totally cool, top of the radiator with 50/50 mix, start let it warm-up again with cap off and top off again. I did the above maneuver 3 times over a 5 hr. time period and after the last top-off I took it out for a 15 min cruise and midway thru the ride it red lined. Later, I discovered a small trickle leak at the thermostat goose-neck. Must have not seated properly from the last time I changed the thermostat. Next, I removed the gooseneck and reattached it but this time I did not put the thermostat back in. BTW, it's an 82 C. unit. I then fired up the Scoot and ran it for about 30 mins in stop & GO, 45mph sustained on the freeway (still well inside the break in mileage) and low and behold the temp meter stayed mid-way and went just slightly above midway during idle behind a truck at a red light. The idle is the same as with the thermostat in which is a little rough. I'm pretty sure the A/F mix needs to be tended to. I could not find the mixture adjustment screw yet. I'm pretty sure that it's not on the intake manifold end, I'll need to remove the airbox to see if it's on the inlet end of the carb.
Acceleration out of the hole seemed normal and thru mid rpm's all seemed fine. While pulling out of stop there's a low level "rattling marbles" sound that has been there from my 1st test ride remained. Perhaps the sliders. Seems to be coming from the aft eng to CVT area. I suppose that my repl thermostat could have been defective. I have a new one that should arrive on Tues or Wed. but have decided to run it w/o the thermostat for awhile and monitor how it runs and heats. The weather temp around here is supposed to drop alot tomorrow as it has been mid to upper 70's for the past 5-6 days. Wondering if the Chicom mech's might have left a large sponge inside the eng. somewhere, lol. I say that because after I have been doing the complete rad/eng drains into the catch pans and refill the top off's always seem to take nearly a whole gallon of anti-freeze including what I pour into the reservoir.

Thanks to all and will be donating to the site,

Ern