2cycle engines

Craig45 · Jun 21, 2017

Is there a brake in period for a new engine?

Jim in rush co · Jun 21, 2017

The last 2 pro chain saws I bought the dealer had me run them about 10 hours and then bring them back to be tweaked up, they really screamed after that. I think they set a little rich to start with.

Russ from MN · Jun 21, 2017

I just bought a Stihl leaf blower last week, I asked the salesman about break in, he said don't do anything different. He filled it with gas and test ran it, maybe the mix they use is a little strong, although it doesn't smoke. If you buy a 6-pack of oil with the tool they double the warranty to 4 years, I thought it was worth it. I was surprised to see that you can adjust the carburetor with a screwdriver, and instructions in the owner's manual.

D beatty · Jun 21, 2017

I have bought 4 Stihl chainsaws and 1 weedeater and manuals and dealer said to not run over 3/4 throttle for first 3 tanks of fuel After that use it the normal way you would use it.

Bret4207 · Jun 22, 2017

This has been discussed here and elsewhere since the internet began. Some say run it hard, others say take it easy. I'm in the take it easy crowd. No hard evidence I'm aware of to back either school of thought.

tractorguy2 · Jun 22, 2017

I used sell trimmers. One cemetery used to buy two trimmers every three years. It is a five acre cemetery. I guarantee they did not give the trimmers a break in period. They were ran hard all day.

Texasmark1 · Jun 22, 2017

Not in today's market, 2-4 cycle, gas-diesel, matters not. Tin plated piston rings to seal right off the bat. Personal experience, from trucks to tractors to ZT mowers to weed eaters to chain saws. Buy em and use em.

Russ from MN · Jun 22, 2017

I was told once that the higher you rev an engine the higher the piston goes in the bore, due to rod and other component strech. Therefore if you break in an engine at slower speeds, the rings will be hitting a ridge when you do rev it up. I know, on most engines there is no detectable ridge, but this is a theory that I heard. I think with modern machining and technology it really doesn't matter.

dr sportster · Jun 22, 2017

That was a true thing but it was usually a teenager buying a car from an old lady . The kid would rev higher and stretch the rod which would now break the top ring.

Part Time Pete · Jun 22, 2017

My buddy rebuilds probably five tractor engines a year, and he breaks them in by putting them on the lagoon pump and work the heck out of them
With new stuff, I generally try and go easy for the first hour or so, then run it the way you're going to use it
Pete

kevinthefixer · Jun 23, 2017

With a 4-stroke, you want to change the oil after the first few hours runtime, it will have tiny glitter in it, mostly from the rings and bores seating together. That's abrasive, and gets through the filter, so you want to lose it ASAP. 2-strokes, of course, just blow it out the exhaust.

2cycle engines

Craig45

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Jim in rush co

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Russ from MN

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D beatty

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Bret4207

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tractorguy2

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Texasmark1

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Russ from MN

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dr sportster

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Part Time Pete

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kevinthefixer

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