Question about Briggs Stratton IC Horizontal OHV Engine 305cc 1450 Series 145 Gross Torque 1in x 3 2132in Shaft Model 2053320537B1

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Have a bent push rod.I replaced it but can't adjust the clearance because the travel of the push rod is more than the valve will allow.

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I think you have posted in the wrong area!

Posted on Jun 17, 2014


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Is there anyway that i can fix bent push rods ?

There is no way to repair push rods. If they are bent they need to be replaced. However, the hundred-dollar question is "Why were they bent?" The only thing that will normally bend a push rod is if the pistons hit the valves and compressed and bent the rods. If the push rods are bent, you should go the extra distance to inspect the valves/pistons for damage as well.

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What causes push rods to bend on left bank of a 20 HP V- Twin

Here's some generic answers, not relating to this engine specifically:
  • The timing could be off, so the piston is hitting the valve.
  • A loose pin in the piston could be allowing it to extend too far, shoving on the valve.
  • I guess the valves could need to be adjusted so there's a gap.

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1 Answer

Craftsman lawn tractor

Hi, had it been sitting some time unused?
Sounds like the valves are stuck in their seats and the rods bent when the motor pushed them with the cam.
You might be lucky and the one that fell in didn't get into the works.
Make sure you fish it out before doing anything else.
I'm guessing it is the typical side valve type motor?
Remove the valve cover (I guess you have already to get the push rod out) and using some sort of lever try and move the valves up against against their springs. Don't bend them with sideways pressure though. If they're stuck some CRC / WD40/oil or similar will help to get them moving. Remove the spark plug and spray CRC etc onto the valve heads inside the cylinder.
Assuming the push rod hasn't contacted anything moving while the motor was being wound over and done more damage, you should be good to go with new push / 2nd hand push rods. Just check there is some clearance between the push rod and the valve stem when each valve is closed.

Oct 09, 2013 | Craftsman Garden

2 Answers

I bought a new short block for my Kohler CV730 25HP. I'm about to take the old cylinder, valves, rocker arms, push rods, etc. from my old engine and place on the new block. Unfortunately, I'm very...

turn the crank shaft and watch the relationship between the piston position and the cam followers. As the piston nears top dead centre you will see the exhaust cam follower start to move down and the inlet cam follower start to rise up. This will create a rocking motion of the cam followers at top dead centre. This is known as valve overlap assemble the motor in this position. Ensure the valve clearance is backed right off Turn the crank shaft one full revolution and you now have the compression stroke . This places the piston again on TDC and it is at this position you adjust the valve clearance. Check that clearance for the tappets as most engines run .010" and .012"tappet clearance. If the head is fitted last place the push rods in the cam followers if you cannot see the cam followers and it does the same job. When the top of the push rods reach the overlap situation it is just an extension of the cam followers.

Oct 07, 2013 | Kohler CH25 PA-CH730-0040 Command Gasoline...

1 Answer

Puch rod come off roker arm

Usually there is a reason why the rocker arm came off the push rod so you will need to check a few things before putting it back together. First make sure the push rod is not bent, if it is replace it, do not try to straighten it. Make sure the rocker arm stud did not loosen, if it did back out, re-tighten. If you're ready to put it back together, you will need to set the valve clearance between the rocker arm and the push rod. You will need to know the engine model number to get this clearance since it varies. Once you get the clearance values, make sure the piston is at TDC on a compression stroke and adjust the valves per the setting. In some rare instances, the valve can "stick" in the valve guide and this will cause excessive gap. However, usually when this occurs the engine will not start anyway. Hope this gets you in the right direction.

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1 Answer

I have a Generac NP-50G Generator with a broken push rod

The push rod should just go back in where the broken one was. They set into the tappet almost automatically. You can slowly spin it over to verify. I'd replace both push rods if it where mine.
This is a generic OHV " How to adjust the Valves" YouTube video which should take you thru the process.
Change the oil. Check/adjust the valve clearance at least yearly.

How to Adjust Valves on OHV Small Engines Valve Clearance lash

Sep 19, 2017 | Sport & Outdoor - Others

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I have a tecumseh hm100 on a powermate generator that is hard to start and backfires from the muffler. I pulled the breather cover off and I can see the exhaust valve and lifter rise approx. 1/4'' on...

Any time a small engine is hard to pull you need to check your valve clearances. If they check out look for a bent push rod. Also check your spark plug anytime it backfires. Even if it appears to be good I would replace it since they are cheap and can go bad and not show any signs of a problem.

Finding top dead center: Remove your spark, remove your valve cover, pull over your engine slowly, watch for the intake valve to open, once it starts closing put a long screwdriver down the hole on top of the piston. As you pull your recoil rope let the screwdiver follow the piston up until you hit the highest point. At TDC you will notice that it will not move for about a 1/4" pull of the recoil rope. It may take a few attempts. And alway reverify your valve setting after making adjustments by finding TDC again and checking the clearances.

Check the valve clearances they should be .005-.007on your intake and .007-.009 on your exhaust. The intake is always closes to the carb and exhaust to the muffler. The slightest bend in a push rod will do this and is hard to detect. The best way to check them is to remove both rods and on a smooth clean surface roll them together and watch the gap between them. If they are good the gap should remain constant. If other, replace both rods since they are cheap and with one bent it's hard to tell if the other is slightly bent.

Note: Before doing any of this; shut off your fuel, remove your spark plug and pull over the engine a few times. Any excess fuel in the head should come flying out. It's a good idea to spray a little carb cleaner in the cylinder via the spark plug hole to help dry up any oil if present when doing this.

Mar 22, 2009 | Coleman Powermate Powermate 5000W...

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