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18hp Briggs Burns A Bit Of Oil


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#1 motobreeder ONLINE  

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Posted October 16, 2012 - 05:01 PM

I'm going to look at this tractor. I'm told that the motor is consuming a bit of oil. I'm sure it's an 18HP Briggs twin.

Is there a common problem? Any experience the amount of work involved to fix this? Apparently it runs great but will consume about a few ounces per hour.

Also needs the electric PTO replaced. Is that cost-effective?

What I really want are the parts bolted on the front and back, but hoping that the rest of the tractor will have value to cover most of my costs.

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#2 motobreeder ONLINE  

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Posted October 16, 2012 - 05:39 PM

Curious question - is this a horizontal or vertical motor?

#3 John@Reliable OFFLINE  

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Posted October 16, 2012 - 05:43 PM

Curious question, how much are they asking?

PTO could be over 200 bucks

Edited by John@Reliable, October 16, 2012 - 05:52 PM.


#4 New.Canadian.DB.Owner OFFLINE  

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Posted October 16, 2012 - 07:00 PM

... Apparently it runs great but will consume about a few ounces per hour. ...


Does it consume (as in slips past the rings), aspirate (as in sucks back through the carb because of a dirty air filter), or leak? Either way, your question has to be "where is the ounce of oil going & how is it getting there?" Only then can you assess repair time & costs.

Edited by New.Canadian.DB.Owner, October 16, 2012 - 07:01 PM.


#5 rustyoldjunk OFFLINE  

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Posted October 16, 2012 - 07:51 PM

im only guessing but i believe that model is 1993 or back so i think it should have a horizontal shaft engine.

#6 larrybl OFFLINE  

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Posted October 22, 2012 - 09:21 PM

Well, for the front & back accessories, I would give a left nu** to have them. As for a complete overhaul, including an engine rebuild (bored 0.020 over) new pistons rings and valves, and replaceing worn steering bushings, Transaxle seals and fluid, and paint the whole thing, figure $2,000 to 2,500. I have done two so far, and am really happy with what I have. Almost..... heck I will eventualy load Hulk II up and go to a Craftsman store just to compare.

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#7 motobreeder ONLINE  

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Posted October 24, 2012 - 11:16 PM

Thanks for all of the replies. I bought the tractor as part of a package deal.

I started a new thread. The tote and hitch where just the tip of the ice burg.
http://gardentractor...h-lots-of-toys/
It took a 6.5' x 12' trailer and mini-van to get everything home.

It's a horizontal shaft motor. It starts easily and runs great. It seems to smoke under load.
I'm wondering if a new set of rings might be enough to fix the oil consumption issue.

I can see how spending $2000 or so may be worth while, but is well outside my budget. It's not like the stuff they sell now.

#8 RoosterLew OFFLINE  

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Posted October 25, 2012 - 01:21 AM

Smoking under load usually means just that, worn rings.
You may be able to get away with a fresh set of rings and a light honing, however if the bore is worn much that won't help a lot.

Here is a low budget fix I have used many times, it is also a " power trick" we use on racing engines.
Hone the cylinder and buy a set of .020 over rings. Then you " end gap" the rings. Basically grinding down one end of the rimes until when inserted in the bore you have a correct gap between the ends of the ring.
To measure the end gap, place the ring squarely in the bore, perfectly square. There are different ways to do this. Some people put the piston with the original rings in the cylinder and push the new ring down on top of it, then pull the piston out. I set my calipers an inch out and lock them, then use the stem end to square up the ring.
Once you have the ring squared, use feeler gauges to measure the gap.

To open the gap you TOUCH the end of the ring to a grinding wheel. TOUCH is the key, rings are small and grind away easily!!! I would highly suggest practicing on a junk set of rings to get the feel for this.

A few "quick tips" on ring grinding:
There are commercially available ring end grinders that make the job easier, but for occasional jobs a bench grinder works just as well.

Be sure to get the end square!

After grinding use a file or emery cloth to deburr the end, a sharp corner leaves a deep gash in your cylinder.

Grind only one end using the other end "factory" makes it easier to square the end.

End gaps:
For performance small engines we use .003-.005. This will cause faster wear, but we rebuild performance engines often.

For standard use .01-.015 ,I like to stay on the tight side,around .01. It makes for better compression.

I have used this method on many engines with great success up to .005 over bore with a stock size piston. Much more than that and you will get excessive piston rock and skirt scrubbing.

Good luck with the tractor, if you have any issues with that engine feel free to give me a shout, I've done a few of them....or a few dozen lol.

Another offer I'll extend to any member. I have quite a few of these engines lying around, I build race engines out of them and many parts on them I do not re-use. Those parts I would happily make available for the cost of shipping. So before you hit Ebag or drop too much at your Briggs dealer, drop me a pm I may have what you need. :)
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#9 KennyP OFFLINE  

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Posted October 25, 2012 - 06:19 AM

That is good info! Thanks for sharing it and the extra parts.

#10 larrybl OFFLINE  

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Posted October 25, 2012 - 07:41 PM

Check the bore, both mine had score marks like this.

In my case, getting the valves right was the hardest. If you remove yours, mark which sides they go to.

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Edited by larrybl, October 25, 2012 - 07:44 PM.


#11 baerpath OFFLINE  

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Posted October 26, 2012 - 11:54 AM

I have a good clutch if you go that route It will be off a GTV18 and I know it works

Duane

#12 motobreeder ONLINE  

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Posted October 26, 2012 - 10:28 PM

I have a good clutch if you go that route It will be off a GTV18 and I know it works

Duane

My son found a wiring issue. Fixed up the connection and PTO works great.
Thanks for the offer.

Dwayne.

#13 baerpath OFFLINE  

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Posted October 31, 2012 - 10:36 AM

My son found a wiring issue. Fixed up the connection and PTO works great.
Thanks for the offer.

Dwayne.


Hey you spelled your name wrong !! Glad it was an easy fix
Duane

#14 motobreeder ONLINE  

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Posted October 31, 2012 - 04:43 PM

Hey you spelled your name wrong !! Glad it was an easy fix
Duane


It's the English spelling - for those of us with a colourful sense of humour.
Time to get off the chesterfield, don a touque and hit the highway.
:D




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