Problems starting YM 1700

ym165dpete · Nov 5, 2012

I had the same problem with my ym165d early this year .I tried everything ,but it turned out to be on the neg cable were it bolts to frame ,I took it off and ground down to bare metal.The starter spun faster then ,and cranked right up.The white smoke is unburt fuel,the black is under load till warm.I allso ended up getting a new battery.Get the highest cranking power that will fit. Pete

puresol · Nov 5, 2012

I grew up off of High Point Rd. I remember when 78 was two lanes. Glad to make your acquaintance. This forum is a huge help. So I guess not having the reg would make the computer fail it on the reg..

puresol · Nov 5, 2012

Pete I appreciate the response. i have checked and cleaned, sanded to shiny metal, the frame and the cable connector.

California · Nov 5, 2012

puresol said:
If my alternator is bad wont it shut off if I remove the pos battery cable? I know it works on gas engines. I tried it and it kept on running.

Nothing you do in the electrical system will shut off the engine. On these early diesels, the electrics are purely to maintain the starting battery plus run headlights etc. There isn't even an electric fuel shutoff solenoid. As soon as you quit cranking, the electric system is completely unrelated to the engine.

If you meant the alternator should quit sending current if there is no battery - I don't think so. Somewhere in the manuals it says leave the key off if you don't have a battery in the tractor and start it by jumpers or towing. So I interpret that to mean that current is generated whenever the key is on and the alternator is turning. The voltage regulator is a tin box on the firewall behind the steering column. (Or if it has been replaced, then smaller and potted in plastic).

if you haven't found this by reading old posts here: YM1700, YM2000, YM240 use the same alternator and regulator as '70~73 Datsun (Nissan). Tell Autozone to set their tester for '72 Datsun. Datsun-spec parts are a direct replacement if you need to replace either/both. But test your components thoroughly first.

While white 'smoke' is unburned fuel vapor, I think the black smoke you see for the first few seconds is excess fuel that is incompletely burned.

California · Nov 5, 2012

Here are a couple of old threads related to what you are working on.

http://www.tractorbynet.com/forums/yanmar/171020-injector-removal-tool-cheapskate-version.html

http://www.tractorbynet.com/forums/yanmar/166351-wiring-ym240.html

puresol · Nov 5, 2012

Thanks- I will read them and save link. I dont think I have a serious problem. I used it today on my old garden spot. Drug the harrow a few times thru, put it to a little work. No black smoke while working, only slight smoke when working. Did fine. Need to re-check fluids to see if I used any or are levels staying the same. Maybe the loose connection at the starter was my problem. Will see.

deepNdirt · Nov 5, 2012

puresol said:
Maybe the loose connection at the starter was my problem. Will see.

8 out of 10 times it usually is a bad connection, and most of the time it is the ground wire,

all of Georgia has been built up around us, back in the 70's - 80's everyone was willing to let progress move us ahead, and now everyone is moving to the hills,

I was born /raised in Buford, never moved away more than 20 miles from there,

Incidentally I have relatives in Snellville myself, as well as having some in Lavonia,

puresol · Nov 6, 2012

To all who offered advice I appreciate it. Havent start my tractor in over 24 hrs. Went out back as soon as I got home, 48 outside, three tries (no thermostart) and I am up and running. Now to start flushing and filling. Thanks again for the help.