New Guy Qs re: w/ older Tecumseh Model ohh60 6.0 Yardstar

[faber]

Hi,

Engine running fine after new carb, oil, filters etc, however I note three yellow oil ports - a high one on motor with dipstick where I drained & replaced oil (21 oz 30w) - the other two I assume are transmission/clutch oil ports(?) - see pics - I'm searching but meanwhile, can anyone advise on specs/capacity for the two low ports? Any other lube advice for this beast is welcomed. I'm also looking learn how to adjust the governer on this but found a video or two on that.
Thanks,

 

[ONE-EYE]

I'm not 100% sure but I believe the 2 lower ports are used for draining and the upper is used for checking the oil level and filling easier. Don't quote me though lol.

 

[FlyFrog]

I'm not 100% sure but I believe the 2 lower ports are used for draining and the upper is used for checking the oil level and filling easier. Don't quote me though lol.

you are correct

 

[FlyFrog]

Hi,

Engine running fine after new carb, oil, filters etc, however I note three yellow oil ports - a high one on motor with dipstick where I drained & replaced oil (21 oz 30w) - the other two I assume are transmission/clutch oil ports(?) - see pics - I'm searching but meanwhile, can anyone advise on specs/capacity for the two low ports? Any other lube advice for this beast is welcomed. I'm also looking learn how to adjust the governer on this but found a video or two on that.
Thanks,

Is that a early model klipper kart, it looks simmalar to mine

 

[faber]

Hi, don’t know brand - Yard star? Lower yellow port beneath engine oil port smells like transmission fluid and there’s a drain bolt beneath it. Single low yellow port on other side smells like oil but I didn’t see a “drain”. Engine oil drain was on opposite side from engine oil port (the high one). Gonna open up lower drain beneath two yellow ports tomorrow. When I say port I’m referring to the yellow screw caps.

 

[FlyFrog]

those are just for oil lol

 

[FlyFrog]

like engine oil, I have that exact one

 

[Karttekk]

Here's the engine repair guide you might find useful.

https://www.barrettsmallengine.com/p/tecumseh-overhead-valve-engine-manual.html

 

[faber]

Thanks a lot all - That manual looks very useful! Thanks! - I'm convinced the lower "ports" concern the clutch which is not addressed in the engine manuals - as indicated port beneath engine oil port is definitely trans fluid - appears the fill level is even with the port. Single low port on "carb side" fill level appears to be the same. Seeking to find the specs/type for these fluids.

 

[Karttekk]

Looks to be a gear reduction unit or possibly a wet clutch.

NORAM GB2-7575 Gear Reduction Wet Clutch

OMB Warehouse - Go Kart Parts and Mini Bike Parts. OEM and Aftermarket supplier of Outdoor Power Equipment Parts, Arborist and Landscape Supplies.

www.ombwarehouse.com

 

[Karttekk]

Another video, mentions motorcycle transmission fluid in the comments section

 

[FlyFrog]

I wouldnt put anything but engine oil in there.... iv taken them apart it doesnt have anything to do with clutches or transmisions

 

[Karttekk]

I wouldnt put anything but engine oil in there.... iv taken them apart it doesnt have anything to do with clutches or transmisions

This PDF does suggest regular 30 weight or 10W30 motor oil for the gearbox. If you watch the above video on YouTube, someone mentions motorcycle transmission fluid in the comments. Not sure why.

https://www.noramclutch.com/wp-content/uploads/2018/12/GB2-7575-Gearbox-Installation.pdf

 

[karl]

Not sure why.

The reasoning is motorcycle oils and most diesel motor oils lack friction modifiers, unlike passenger car oil.

These are not good for wet clutchs, hence why motorcycle/ATV oil lacks them.
(transmission and motor oil is shared in the crankcase)

But for this application, it's probally trivial. If the manufacturer does not specify a specific oil,
don't worry about it. Any 30w will suffice.

 

[faber]

Thanks very much again - yes it's a wet clutch - I checked two lower ports again - I guess both are oil - I will drain via plug beneath two ports and see if it drains both lower ports - I put 30w in the engine oil - per above will add 10w-30 to clutch oil port. Btw, Will upload vid to youtube & share link.

 

[faber]

Video Link:

 

[FlyFrog]

Btw for the govenor just remove the springs on that silver plate by the carb and replace with coat hanger

 

[madprofessor]

Here's a governor tutorial by Kohler that you may know all about already, but it's helpful to see where you can make an adjustment. It's as simple as loosening the pinch joint that secures the governor lever to the governor shaft rising up out of the block, and twisting it a couple of degrees in the appropriate direction and retightening. One way will raise the setpoint rpm, the other will lower it.
How the Small Engine Governor Works - YouTube

 

[faber]

Thanks very much! Really appreciate all the insights! Will review all the vids - BTW unscrewing plug on forward bottom edge drained BOTH lower ports. Ha.

 

[Denny]

There is no both lower ports. It’s just one big sump.