YM 1700 poor starting

[Ginormous]

when i tried to rebleed it and took the collar nuts off the right hand side never really even dripped. left hand was ok.

might try starting to bleed back from the start again

also the new starter motor is getting very hot.

got me stumped.
n

When you re-bleed, let a LOT come out at each step just to make double dog sure the air is out.

 

[284 International]

also the new starter motor is getting very hot
n

I think this is a clue. Remember that the heat produced by an electrical current increases as the square of the current: double the current, and you get four times as much heat. (Is that Lenz's law? Something like that.) The next one is Joule's law: We know that power equals voltage times current. Since the starter motor will try to pull the same power from the battery, as the voltage decreases the current goes up, generating more heat. If you burn your new starter up, you'll REALLY have a tough time starting it.

Since you have said you ran the battery flat and need another battery to make it spin rapidly, I you have starting circuit troubles. As suggested, clean and/or replace the battery cables and their attachment points. Get a known, good battery (which may mean a new one) and use that. Replace the gunky fuel filter, bleed the lines, and you should be in good shape. If the fuel is only a year old, it won't matter unless it is contaminated, but if clean, it will work fine.

Good luck!

 

[California]

Lots of fuel comes out from the filter belled screw and pump bleed screw but not much from the injectors ...

Does anyone have any thoughts about how to make it start easily again.

Note there are two bleed screws on the fuel filter plus one on the pump.

Experience dealers posting here recommend: Bleed the screw at filter input, then output, then pump input. No need to bleed at the output side of the pump.

For each screw, bled until no bubbles then close it and go on to the next one.

I doubt year-old fuel is bad.

 

[nickfish]

To be honest I'm not happy about the battery cables. the battery is new (six month old max) but the cables are very tight, no play to the battery. I could easily fit two new ones I guess. I am worried that the new starter is getting so hot and even a little smokey - which it does very quickly.

 

[nickfish]

after i've bled at the screws should i bleed at the injector collar nuts too. like I said one shows no fuel pumping through - or very, very little

many thanks by the way for al your help

 

[Ginormous]

If you're not getting a good drip from one of your lines at the injector, there's something wrong. I think when I took mine off, it was dripping about 1 drip per second while cranking the engine.

Definitely be careful not to crank the starter too long. The manual recommends "stopping for several minutes" after cranking for 10 seconds. I don't follow that advice, but I would let it cool a minute after cranking for 20 seconds.

 

[grainger12002]

as others have stated,check your connections,make sure it has a good ground and the cables are large enough to carry the voltage to the starter.

Best of luck

 

[California]

after i've bled at the screws should i bleed at the injector collar nuts too.

No, bleeding at the three bleeder screws upstream of the injector pump is all that is needed. Air beyond the pump will be forced out through the injectors by the pump.

 

[silvertramp]

Your cables may be bad. I had a cable catch fire in the middle while boosting a tractor. Turns out the battery was good, but the cable was all corroded under the insulation.
If you haven't done it, clean the frame down to shiny metal where the ground attaches.

 

[nickfish]

Thanks to everyone for your suggestions. I got it started! I think the problem was the earth as suggested. Soon as I cleaned it up and refitted the clamps, the speed at which it turned over was so much faster. I assumed it was a fuel issue and I did bleed it all again as suggested but the noise it makes turning over on the starter now is so much more positive I'm sure it was the earthing etc that did the trick

many thanks

Nick