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Small Engine ??

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URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=184857
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Topic: Small Engine ??

Posted By: FREEDGUY
Subject: Small Engine ??
Date Posted: 29 Nov 2021 at 5:26pm

I stopped int the "farm" this morning to pick up some of my tools in storage. Dad happened to be out in the yard while I was pulling out and flagged me down. We talked for awhile and he brought up the "BACK" of his over/vest. I did notice "blotches" on it but never gave it much thought.

Long story short,he was vacuming leaves with a pull -type/self powered trailer system (CYCLONE ?) with a 5 hp Briggs. Apparently it blew a drain/oil level plug( this 5 hp has 2 at either end) and sprayed oil from the engine "plug" 4 feet forward of the engine all over the rear end of the Zero turn, operators backrest, and dads vest. Is there "positive" oil pressure in these engines to fling oil that far ??

Replies:

Posted By: JW in MO
Date Posted: 29 Nov 2021 at 5:34pm

There is if the crankcase vent gets plugged.

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Posted By: DaveKamp
Date Posted: 01 Dec 2021 at 9:07pm

Doesn't even need a plugged crankcase vent... the mere motion of the single piston constitutes a significant change in crankcase volume... if the plug is out, and the piston comes down, it'll blow oil out that filler, and spit it a LONG way...

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Ten Amendments, Ten Commandments, and one Golden Rule solve most every problem. Citrus hand-cleaner with Pumice does the rest.

Posted By: FREEDGUY
Date Posted: 02 Dec 2021 at 7:31pm

Thanks DAVE, in hindsight, that makes sense. But what would make a "check/fill" plug bow out? This engine had 2, one in the front, one in the back. Dad never remove either of them. The drain plug is lower on the block and the filler port on top has a dip stick Embarrassed

Posted By: SteveM C/IL
Date Posted: 02 Dec 2021 at 10:55pm

It would only make sense that the plug wasn't properly tightened when last installed and over time worked loose enough to finally blow out. I bet it was showing signs of leaking before the failure....but you'd have to look.

Posted By: FREEDGUY
Date Posted: 03 Dec 2021 at 7:37pm

SteveM C/IL wrote:

It would only make sense that the plug wasn't properly tightened when last installed and over time worked loose enough to finally blow out. I bet it was showing signs of leaking before the failure....but you'd have to look.

Sadly, there are 2 different "fill level " plugs that dad has NEVER cracked Wink

!! the oil drain on this engine is a square metal plug, the "idiot" (I assume) yellow plug 3/4's of an inch above that plug for oil level (that's what let loose) is redundant on this engine as the top-end filler cap has a true dipstick on it Confused

?? Dad has NEVER loosened the yellow caps (one in front, one in back) since he's owned this machine Clap

Posted By: Stan IL&TN
Date Posted: 03 Dec 2021 at 8:00pm

I would want to look at that plastic plug. If it showed stripped threads, cracked in two or if it looked un damaged. If not damaged then I'm betting it just worked itself loose until it fell out. I have a pressure washer with that engine on it so I better check mine.

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1957 WD45 dad's first AC

1968 one-seventy

1956 F40 Ferguson