Rebuilding small engines for longer life 1

[m899nyc]

I’ve had flathead Kohler and single cylinder Honda engines last around 10,000 hours, but I can’t seem to get more than 1500-2000 of life out of a Briggs and Stratton I/C flathead. Is there anything I can do to increase the longevity of this engine, possibly different rings, or cylinder coating? I’m not sure what this particular design is so limited.

 

[m899nyc]

@TugboatEng: The bore and crank wore out. There were a lot of metal shavings in the oil. It was an aluminum engine with a liner. I wonder if I had a better liner and custom bearing if I could crack 7,000+ hours. But I don’t know where I could have the parts made.

 

[mfgenggear]

My 2 cents
A tear down required
Inspect and record every detail.
F then compare with oem specs.
There are repair manuals.
Rebuilding will not be cheap.
If the cylinder is worn, bore out if possible
Insert a sleeve and reborn.
Are there rod and crank bearings
For over sized holes and u/s shaft.
Have the crank ground under size and engineering chrome plate. Regrind to size.
Check condition of valve. The will stick and bend when these small engines over heat.
These motor are not heavy duty cycle.
And will over heat.

 

[mfgenggear]

For got to add, carburetor will warp from heat and suck air. The magnetos will corrode, if left in the rain. Causing failed ignition.
Heat will wear out an engine.
Keep cool