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Briggs engine

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conductor_81
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« on: November 26, 2012, 07:16:09 pm »

Well I need alittle info on this engine. Model is 31p777 type is 0237 g5 code is 110122ZA. I know 31cu 17 or 18hp single cylinder. The engine shroud has not decals so Im just wondering if its avs or not and how well will it work for racing. This motor was given to me. If its no good for racing I will take the carb and fuel pump and put it on my 28cu just because. I think i can also use the rod in my 28. But any how and info would be great thanks in advance.
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« Reply #1 on: November 26, 2012, 08:02:49 pm »

It's a full pressure lube AVS   http://www.partstree.com/parts/?lc=briggs_and_stratton&mn=31P777-0237-G5

They will work ok in MODXR  We ran two of them in our group with no problems.

The rod wont fit in your 28. The 28 has a smaller journal. unless you have an AVS 28. Also it probably has a nikki carb on it and a adjustable jet wont work in them. 


Mark


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Mark
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« Reply #2 on: November 27, 2012, 06:00:43 am »

IS THE AIR FILTER A FLAT PAPER WITH A FLAT FOAM PRE FILTER IN BACK OF IT? IF SO ITS AN AVS.
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JOHN HERRING
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conductor_81
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« Reply #3 on: November 27, 2012, 08:51:36 pm »

No the filter is round. The rod says 28-31 avs but that all i can find for castingson the engine or any parts other than the carb. And the carb is a makuni that is on the engine. Hope this helps.
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Keith
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« Reply #4 on: November 28, 2012, 05:58:08 am »

IF THE DIP STICK GOES THROUGH THE BLOCK AND NOT THE PAN, ITS A AVS.
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conductor_81
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« Reply #5 on: November 28, 2012, 08:53:21 pm »

The dipstick is in the pan grubby. Is there anything internal that will be a dead give away if its an AVS?
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Keith
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« Reply #6 on: November 29, 2012, 05:54:22 am »

The dipstick is in the pan grubby. Is there anything internal that will be a dead give away if its an AVS?

IN THE PAN, ITS NOT AN AVS.
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conductor_81
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« Reply #7 on: November 29, 2012, 07:35:13 pm »

Ok well sounds good then. Mite make a mod-x-r motor out of it then.
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Keith
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« Reply #8 on: November 30, 2012, 05:10:36 am »

Yeah if the filler tube goes into the pan and not through the block it isnt an AVS, if you tear it apart and the rod journal on the crank measures 1.250" it isnt an AVS
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Tim Toleson 24yrs old. Constantia NY
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« Reply #9 on: December 06, 2012, 03:20:03 pm »

IF IT MEASURES 1.5 IT CAN BE AVS OR NOT. GRUBBY IS CORRECT, IN THE PAN NON AVS!
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« Reply #10 on: December 06, 2012, 07:11:40 pm »

Ok well thanks for all it info guys. Dipstick is in the pan.
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Keith

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