Ym1500 rebuild finished

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Hnewman144
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Ym1500 rebuild finished

Postby Hnewman144 » Thu Mar 01, 2018 9:32 pm

I finished the rebuild a couple days ago.. new sleeves, pistons, rings, rod bearings, wrist pins, head vatted and pressure checked with new valve stem seals at head shop. Found that the pistons was busted in one spot from previous owner using ether I assume. It also had ate some dirt due to air filter housing had a small hole in it. The engine smoked and burned oil pretty bad.. now it fires right up and sounds alot better! I havent had time to run it alot yet. Maybe 45 minutes at the most. So far it's running about 170 degrees (not working) and oil pressure is running around 38-45 psi at 1500-2200 rpms. How does that oil pressure sound? Before the rebuild it wouldn't climb past 35. But is this new oil pressure suitable? Also I know it's not broke in yet but it smells like it's burning a little bit of oil. You can't really see it just smell it. Before I built it it was blowing blue clouds. I assume after the rings seat good and break in good it will stop all together?? Any specific procedures to breaking in a fresh engine? I'm very satisfied with it so far. It went from alot of blow by to almost none also.

winston
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Re: Ym1500 rebuild finished

Postby winston » Fri Mar 02, 2018 8:03 am

Sounds to me like your good to go. I have no information of just what your oil pressure should be but would be confident in saying yours is ok. For what it is worth I can tell you a YM155 pressure is to be between 21.35 - 35.56 psi. It is a smaller 2 cylinder. The YM220 3 cylinder is to be 36 to 57 psi.

Hnewman144
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Re: Ym1500 rebuild finished

Postby Hnewman144 » Fri Mar 02, 2018 8:07 am

Good deal. I think I'm good to go on that than. What's the best thing to do to break this thing in? Should I do some discing? Run a mower? High rpms?

winston
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Re: Ym1500 rebuild finished

Postby winston » Fri Mar 02, 2018 9:43 am

Out of the 195/240 operators manual: file:///C:/Users/linwinmaberry/Pictures/2018-03-02-092932.pdf

Hnewman144
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Re: Ym1500 rebuild finished

Postby Hnewman144 » Fri Mar 02, 2018 10:34 am

I cannot get that link open. Is that supposed to be directions on breaking in?

winston
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Re: Ym1500 rebuild finished

Postby winston » Fri Mar 02, 2018 11:11 am

2018-03-02-111320.jpg
2018-03-02-111320.jpg (154.39 KiB) Viewed 1450 times
Yes, copy and paste it on google.

Hnewman144
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Re: Ym1500 rebuild finished

Postby Hnewman144 » Fri Mar 02, 2018 11:28 am

Great is it normal for it to burn a bit of oil until broke in fully? Like I said you really can't see much smoke but can smell it. It's nothing like it was though

Aaron
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Re: Ym1500 rebuild finished

Postby Aaron » Fri Mar 02, 2018 12:13 pm

Yes, that is normal. Below is a pretty good article on break-in. Not tractor specific but good info that still applies.

http://www.thedieselstop.com/contents/g ... l%20Engine

Hnewman144
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Re: Ym1500 rebuild finished

Postby Hnewman144 » Mon Mar 05, 2018 9:14 pm

So far so good. I cannot believe how great the rebuild worked out. This little engine screams now! The engine break in is still in progress. But its getting better and better. The harder and longer I run it the less smoke is coming out. I think the rings are mating pretty good to the new cylinder liners. There is no blow by now and it fires up faster than you can get off the the switch. It really brought this thing back to life. And it was incredibly easy to do! Winston, Norm, and Aaron and others who have helped with advice... Thanks alot!


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