Can't find filler plug on transmission

First you need the model and type from Briggs then you can look at several online source for engine's ipl,

Here is some guides on finding your engine's numbers.
Briggs Stratton Model Number Locator

hey also have the ipl and parts for you to order from or you can support your local dealer.

Your best bet is to call your local small engine or outdoor power equipment dealer with a model number. The parts dealers can look up your belt in no time flat.

Try Goggle it. Parts for engine. Everyone sells them.

Parts for the engine can be purchased from briggs and stratton
The bearings and seal can be purchased from Napa. Dimensions are required for the bearing inner and outer diameters. (Caliper time)
The tines.... I don't know. My experience on the tines is you either find an old Hahn Eclipse Tiller for parts or you find a good craftsman that can make one. I had to make a LH tine using the broken parts, some forge hardened bar stock and a welder. The tine manufacture took much longer than expected...!
Kelly

Go to sears.com. at top of page about center of page find parts. put in model #. It will give you a breakdown of the whole tiller.Try 917. as the first part of model #.
RGS

I have a fuel tank for this engine. 802-782-2409 Tank is in Like new condition.

Hi.....I am assuming that you have a bowl type carberator on that tiller. If so, the bolt on the bottom of the bowl, is the main jet. If you remove it, you SHOULD, see a hole drilled from the top down to a hole cross drilled thru, near the bottom. Run a small wire thru these to be sure they are clean. Other then this, I'd install a new needle and seat. You can purchase just a needle and seat set, no need for a complete rebuile kit. You will also need a bowl gasket, and if you have a primer bulb, you will also need a new intake gasket or the primer will not work worth a darn. Hope this is of some help, good luck

I went to MTD web site and they had all the manuals for all there products. You will need a model and serial number to get them. Thank you for responding back to me.
I got the manual for the tiller and the engine.

I am having transmission problem (loud noises). I am looking for a repair manuel for a roper rear tine tiller. Model RT150GR chain drive.

Sounds like the worm gears are worn to the point they will not engage.