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OHV135 ENGINE WILL NOT CARRY A LOAD, SUCH AS ENGAGING BLADES, HAS 120LB. COMPRESSION, LEAK DOWN TEST NO VALVE OR CLY. LEAKS . WHAT TO CHECK NEXT?

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  • Contributor
  • 21 Answers

Most of the time, it's caused by dirt, etc. in the carburetor. Disassemble and clean the carb.

Posted on Nov 02, 2015

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6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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CarlGehrke
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SOURCE: WONT START GOOD SPARK SPITS OUT OF CARB

This problem can't be the anti-diesel solenoid in the carb, that only does anything when the engine is shutting down.
Because you got poor results in the leakdown test and get 175 psi of compression (way too much), I suspect that either your intake valve is bad or misadjusted, or the key that holds the flywheel to the crankshaft is sheared off.
Check the valve lash settings and visually inspect the operation ov the valves while you're setting them. If the valves are OK remove the flywheel and check the key.

Carl

Posted on Dec 11, 2008

lester482529
  • 226 Answers

SOURCE: Knocking in mower deck or belt clutch when engaging blades, motor bogs / slows down

YOU MAY HAVE A BENT BLADE OR EXESSEIVE BUILD UP UNDER THE DECK

Posted on Jun 01, 2009

  • 7 Answers

SOURCE: Engine rpm is not steady.

sounds like the spring on the carburator butterfly valve is weak ... when at idel it surges the engine but when the blade is enguaged the engine evens out

Posted on Jun 17, 2009

  • 109 Answers

SOURCE: Engaging blades kills engine

there is a safety switch somewhere toward the bottom of the engagement handle if this switch is bad it will kill the engine there is also a switch under the seat that could be bad

Posted on Aug 23, 2009

  • 138 Answers

SOURCE: engine cuts out when engaging clutch or engaging blades..

lift the seat and make sure the connector is firmly plugged into the seat switch

Posted on Aug 24, 2009

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3 Answers

2002 lexus rx300 # 2 cylinder no compression. plug and coil check ok. what else could cause no compression


Probably valve related. Even severely worn rings will make some compression.
Have you changed the timing belt on schedule (not sure if it's an interference engine but more are today than not) ?
You can see the valves actuating with the valve cover removed (probably not an easy job, most cars aren't these days.)

Jan 06, 2018 | Lexus Cars & Trucks

1 Answer

Burning oil ,no leaks or smoke


how many miles?
can be bad rings.
or bad valve seals.
or both.
do a compression test then a leak down test, and bingo the answer.
if both pass, the valve seals are bad.
if not rings are bad, if the oil test for compression fails the valves them selves are bad, if the teaspoon of oil test , passes the rings are shot.
read up on all compression tests. using google, or by any car engine book, one that tells you how to test for this.

The leak down test, can even tell you which direction the leak happens
using a rubber hose to your ear.
i can hear air leak to crankcase, valve cover oil filler, oil dip stick hole, and to intake plenum and even hear it at exhaust ports. sure can.

one the oil control rings on old engines can stick down and be
near useless. stuck in the lands. seen many like that.

Id use the 2 gauge to judge engine condition,
if bad, its hopeless. (bottom end bad)
if good, all tests. then the valve seals are bad.
there is a way to change them head on car.
using shop air , or other wild tricks.

Feb 07, 2014 | 1995 Honda Odyssey

1 Answer

I have a johndeer f725 it runs on one cly. what is wrong?


do a compression test on the engine looking for burnt valve or a valve held open on the one cylinder.

Jun 16, 2013 | Garden

1 Answer

Knocking at upper left front of engine or # 4 cly. Compression on #2 and 3 cly. 210 psi. #1 180 and # 4 120 psi. Thanks, Larry


I think with the lower pressure reading that the knocking will be coming from a broken compression ring or cracked piston. There is only 10% difference allowable between pistons in a compression test.. However check that the valve train is not causing you problems with a failed rocker or cam shaft bush gone.

Mar 31, 2013 | 2002 Saab 9-3

1 Answer

Can I repair a bad cylinder without taking apart the motor in a 2000 Monte Carlo?


Are you talking about compression readings? If so, and you only have 30 psi, engine is in serious state of disrepair. The cylinder head will have to be taken off to fix the problem-sounds like a stuck valve, a non sealing valve, or a blown head gasket. There's no way to get to it without removing the head.
Apparently you had a compression test done? If you had done or would do a leak down test of that cylinder, it would pinpoint the source of the problem-whether an intake or exhaust valve, or a head gasket, or piston or ring damage. With a leak down test, wherever the air is escaping from the cylinder points to the source: if for instance, air leaks out the exhaust pipe, you know it is the exhaust valve not sealing in that cylinder. If air leaks out the intake-it's the intake valve.
Air hissing from the oil dipstick tube would mean compression is being lost past the piston rings-going into the crankcase.

Feb 22, 2013 | 2004 Chevrolet Monte Carlo

2 Answers

I have a 99 sienna and the cylinders have low pressure what can i do?


If cylinder compression is too low, the car may not even start because of it. Have a shop do a compression test or a leak-down test to check the internal health of your engine. A good engine should have pressures of 150-200 psi in all cylinders and be close to each other. A worn or high mileage engine may have pressure as low as, say 125 psi, but if still balanced (close readings), would still run decent. Compression below that, especially below 100 psi, is serious trouble. ignition spark refuses to ignite the air/fuel mixture and you get a misfire-a non-working cylinder. Low compression can be caused by worn piiston rings or poor valve sealing. Low compression in 1 or 2 cylinders can be a valve problem, burned valves or valves not seating properly.
A leak-down test will check each cylinder and if there is a problem, the test will find the cause of the problem.

Dec 11, 2012 | 1999 Toyota Sienna

3 Answers

2 Things on my 2005 SRX. I keep getting check gas cap messages and replaced the cap once but am getting the messages again. Also, the system says my Engine oil life is still at 69% or so and the check...


Could be leaking from valve cover , or valves are not seated right. Though the piston rings . Or the seals on the valves are bad ( think there called o rings)

Dec 13, 2017 | 2005 Cadillac SRX

2 Answers

Low compression in cylinder 4


When an engine has a cylinder with low compression it will be caused by a mechanical malfunction, and the reasons for low compression in a cylinder can be a bent or burnt intake or exhaust valve, or a valve that is not closing all the way because of a piece of carbon or an improper valve adjustment, the head gasket could be faulty around the compression sealing rings, or the cylinder head could be warped or even cracked, and the piston for that cylinder could be damaged with a crack or a hole, or the piston rings could be worn out or damaged.

The cause of the low compression can be determined without having to dis-assemble and inspect the engine by a "Compression Leak-Down Test" and a good repair shop or someone with a compression leak-down tester and a good air compressor can perform that test.

Jun 19, 2010 | 1983 Ford Ranger

2 Answers

Misfire on #1 cylinder 2004 cavalier.


In order to check correctly, you would have to put the same viscosity of oil in the other 3 cylinders as well for their reading. Have you done a leak down test?

Apr 14, 2009 | 2004 Chevrolet Cavalier

1 Answer

Timing belt broke changed it engine is missing. could it be


The easiest way to test this is to carry out a compression test. This test will determine if any valves are bent. The test is very easy to carry out. 1.obtain a compression tester. 2. remove all spark plugs. 3. screw tester into spark plug hole. 4. with your foot on the accelarator, crank engine. 5. read the tester reading and write it down. eg. cyl 1 175psi cyl.2 170psi etc. if you have a bent valve one cylinder will be very low compared to the rest.

Dec 21, 2008 | 2001 Chrysler PT Cruiser

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