Weird Part in Engine

[Gregor 4,846]

10 hours ago, Old312-8 said:

I know what did it, it was the fuel diaphram arm. Dropped the pan to find the arm, got the arm and the dipper. I’ll pull the rod and piston tomorrow,  I’m doing a carburetor as well.

Another vote for electric fuel pump.

[squonk 41,155]

Those dippers break off more than you think. Dye check or magna-flux every rod you pull out of an  Kohler. You'd be scared to use the rod again.

[953 nut 55,321]

12 minutes ago, squonk said:

magna-flux every rod you pull out of an  Kohler.

The rods are aluminum Mike, can't be magna fluxed.

[squonk 41,155]

13 minutes ago, 953 nut said:

The rods are aluminum Mike, can't be magna fluxed.

That's why I said dye checked too

[The Tuul Crib 7,336]

11 hours ago, 8ntruck said:

Yup.  But when you get it set right, you will have less in that Wheel Horse than in a new box store machine.  You will have a whole lot more tractor than a new box store tractor too.

I work on Cubs every day and I wouldn't give you a penny for each one.

 

[The Tuul Crib 7,336]

The word stamped out is used alot!

 

Edited March 12, 2021 by The Tuul Crib

[The Tuul Crib 7,336]

1 hour ago, Gregor said:

Another vote for electric fuel pump.

[WHX?? 48,828]

1 hour ago, squonk said:

Those dippers break off more than you think. 

 

Yah but why is what I don't get? Just bad castings?  Guys running concrete in the pan?  

[squonk 41,155]

Hairline cracks right out of the foundry, Casting flaws, Porous and contaminated aluminum.

[Bill D 1,926]

I wish Kohler had used oil slingers like the ones found in the Briggs 320000 series iron block motors!  It's a steel piece that is held to the rod end cap with the two connecting rod bolts.  FYI Zach Kerber makes a billet rod with a screw in oil slinger and replaceable insert bearings.  That might be a nice upgrade during a rebuild.  Bill

[WHX?? 48,828]

1 hour ago, Bill D said:

I wish Kohler had used oil slingers like the ones found in the Briggs 320000 series iron block motors!  It's a steel piece that is held to the rod end cap with the two connecting rod bolts.  FYI Zach Kerber makes a billet rod with a screw in oil slinger and replaceable insert bearings.  That might be a nice upgrade during a rebuild.  Bill

Interesting to know if one is building a hi perf. or pulling motor. @Greentored

[Old312-8 11]

I tore down the engine today. 2 questions. Do these have rod bearings? If so, they were non-existent. If the factory rod fit just fine do I get a standard or +10?

[Gregor 4,846]

2 hours ago, Bill D said:

I wish Kohler had used oil slingers like the ones found in the Briggs 320000 series iron block motors!  It's a steel piece that is held to the rod end cap with the two connecting rod bolts.

My 7 HP Tecumseh also had an oil slinger bolted to the rod.

 

I don't believe there are any bearings on the rod. As far as size goes, there is really no way to know for sure without measuring it. You say it's a very low hour motor, so I would guess it is standard. But guessing on something like this, is a really bad idea.

 

BTW what happened to those pics?

Edited March 13, 2021 by Gregor

[Old312-8 11]

I found a few of em online, I’ll buy a standard to put on, and a +10 for emergencies. 

[953 nut 55,321]

26 minutes ago, Old312-8 said:

I tore down the engine today. 2 questions. Do these have rod bearings? If so, they were non-existent. If the factory rod fit just fine do I get a standard or +10?

Don't buy any parts until your machine shop tells you what you need. Get a stick of GREEN Plastigage to see how the old rod was fitting. Chances are the old rod was standard.

 

[Old312-8 11]

The rod was standard, and it fit pretty snugly. No play at all.

[Old312-8 11]

It was just the slinger that broke, and at 200 hours, the rod couldn’t have worn that much. I won’t need any further than a +0.10

[seuadr 488]

On 3/12/2021 at 7:05 PM, Old312-8 said:

I tore down the engine today. 2 questions. Do these have rod bearings? If so, they were non-existent. If the factory rod fit just fine do I get a standard or +10?

Nope, they count on thr rod being aluminum and an oil hole. 

[Greentored 3,214]

On 3/12/2021 at 6:23 PM, WHX24 said:

Interesting to know if one is building a hi perf. or pulling motor. @Greentored

That was a serious consideration when I built the engine in Hoss, but kept the oem rod since I only buzz it to 4000. 

The inserts are a GREAT idea, and there are guys who can machine the oem rods out for use in them. 

As for the dippers, yes, the steel bolt on dippers Briggs uses would seem to be a lot more trustworthy. Seems I remember someone making a billet rod for the 5hp Briggs- it actually had a small hole drilled in the dipper and a tiny 'scoop' carved into it to actually force oil to the rod journal. THAT, along with an actual insert, would pretty much end these 'busted rod' issues, as 99% of the time it is due to lack of lube and a binding big end.

Edited March 16, 2021 by Greentored

[stevasaurus 22,764]

Maybe, when you lost the fuel arm, it got stuck under the oil flipper when you ran the engine.  That is all it would take.