Question about Mantis Tiller

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Engine looses power, then speeds up, then looses power again

I did all the fixes recommended, cleaned the muffler screen, (mine was clear) cleaned the carb, but nothing worked, then I played with the adjusting screws, = success was limited! I got my mantis to start without holding the clutch in, got the tillers to turn quicker with more gas, ran it in the garden and again the tines moved very slowly, then after a few minutes they got some life and sped away, only took 9 minutes to till the 12x10 area and 4 months to tune up this baby! but again after moving up the yard and tilling all other areas, the tines slowed down considerably. I will gladly buy a new carborator or whatever, but I need to know what exactly will fix the slow down problem....

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  • 123 Answers

This sounds like the little fellow is getting hot. Are you using a good oil in the fuel don't skimp on that oil use the best you can find and get a new plug to sounds like the oil is killing your tiller.

Posted on Aug 26, 2009

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Blower bogs down and kills at full throttle


Check the following, then clean or replace:
  • Fuel Filter - Located IN the fuel tank
  • Spark Plug
  • Spark Arrestor - at muffler port, creates resistance of exhaust flow, engine then bogs
  • Carburetor - may need a rebuild kit
Then watch this...

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Mar 31, 2013 | Echo Pb265l 25.4cc Gas Powered 158 Mph Low...

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Went to start bp251 blower after sitting in shed for a week, pull string was very hard to pull. took off plug a lot of fuel came out of plug hole . also checked muffler screen,was clean. there was quite a...


Take plug out turn blower to where plug hole is down pull starter cord many times until all fuel is out. Clean plug, install, try starting without priming or choking. If no start try priming just until you get fuel to engine. Try starting again. If this works when storing blower leave fuel cap slightly loose in very hot weather until you want to start.

Aug 09, 2017 | ECHO, Inc. PB-251C Handheld Blower

1 Answer

My McCulloch Pro Scaper II HD start right up but has little power. The line doesn't spin fast enough. I am using the recommended weight of line. Could this be a carburator issue?


An engine running at reduced power could have different issues. Check for carbon build up in the muffler and on the spark arrestor screen at opening on muffler. Cleaning it fixes this issue. Yes, it could be a carb issue also. If you can, remove the carb and its covers and gaskets, noting where they go, and spray the carb liberally with aerosol carb cleaner. You may just need to adjust the H and L speed jets on the carburetor. There is no one solution to your problem, but it is most likely carbon build up or a malfunctioning carb. A gasket and diaghragm kit (under $10) can fix a lot of carb issues, so after cleaning and if you see no improvement, consider installing a new G & D kit.
Also, don't forget to check the condition of the spark plug. The way a plug looks tells a real story about how the engine is performing. With the plug removed, shine a flashlight into the engine down onto the piston and note how much carbon/crud/buildup there is. Removing this buildup improves engine efficiency and lost power also.

Oct 13, 2010 | Garden

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ON MY ECHO PB 230LN HAS NO POWER.SCREEN HAS BEEN TAKEN OUT OF EXAUST ,NEW CARB KIT,OLUG AND FILTTERS. STARTS FINE,IDLES BUT WONT PICK UP SPEED


I think you are on the right track with removing the screen from the exhaust, but I feel your exhaust blockage is further back...possibly in the muffler or ,most likely, in the exhaust port itself. To check, remove the muffler and visually inspect the muffler port. If it is clogged, rotate the piston to the top of the cylinder and using a dull small screwdriver, chip away at the carbon until you have it clear. don't chip too hard, you don't want to damage the piston. Use some compressed air to blow away the debris. Lower the piston and blow away any stray debris that might have ended up in the cylinder. You can test run with the muffler removed, but only for a few seconds, and it will be very loud.
If the muffler port is clear and the test run without the muffler doesn't cause a significant difference in the engine speed, then the next course is in the carburetor. Most of Echo's current products use carbs that are not adjustable, therefore the carb must be rebuilt or replaced.
Good luck!

Sep 12, 2010 | ECHO, Inc. PB-251C Handheld Blower

2 Answers

My TB320BV slings oil all over my pants. It comes


No, there is no factory sealed oil inside the blower. Did you smell the oil that was on your pants? What I recommend is first, check the head bolts, make sure they are all tight, then remove the muffler (with it not running and cold, of course) and examine the exhaust port, piston and ring. You should see no residue in the port itself and the piston should look shiny and smooth and the ring should be able to move when manipulated with a screwdriver.

Next, pull the spark plug and check the anode (the part that is inside when the plug is installed). It should be dark but not sooty and not wet.

What these tasks will accomplish is:
If there is no oil residue in the exhaust port, the piston is clean, and the plug looks and smells normal then replacing the muffler may take care of the issue.

If there is oil residue in the exhaust port, check the plug; if it is wet, move to the carburetor, intake, choke and air filter.

If the air filter is excessively dirty, replace it, then replace the plug and replace the muffler; that should clear up the problem.

My reasoning: a dirty air filter restricts the air flow through the intake, thereby making the air/fuel mixture too rich; the oil doesn't get completely burned, so it is slung out of the muffler.

Loose head bolts could (not probable here, but possible) allow the oil/fuel mixture to leak out and get all over your pants. I don't think it is the bolts, though, because if they were loose you wouldn't get the right compression and the engine wouldn't run.

Try all of this and, if it does not fix your issue, let me know here...but I have a feeling this is going to fix it.

Nov 23, 2009 | Troy-Bilt Mtd Southwest Tb320bv...

1 Answer

I have an Echo Backpack Blower PB46-LN that is leaking black oil out of the muffler, its easier to start when its cold but when its hot it difficult to start, also I dont even need to prime it to get it to...


This senerio is an 'over-rich' condition, most often caused by an improper fuel/oil ratio mix, and the 'exhaust screen' or 'spark arrestor' on the outlet of the muffler is plugged. Cleaning the screen may be all that is needed to correct the problem. **Make sure this screen is clean, and operate engine for at least 5 minutes before making any of the suggested adjustments below.

Basics to check:
1) Spark plug - brown or dark brown - OK
a) is it carbon or fuel fouled
b) is there spark

2) Muffler remove for inspection
a) exhaust screen clean or plugged
b) inspect cylinder wall/piston as the flywheel is slowly rotated

Overfuel or 'rich' condition
Basics to check:
1) Spark plug - brown or dark brown - OK
a) is it carbon or fuel fouled
b) is there spark

2) Muffler remove for inspection
a) exhaust screen clean or plugged
b) inspect cylinder wall/piston as the flywheel is slowly rotated
3) Check Air filter for fuel saturation
4) Allow engine to run for 5 minutes to excess fuel from muffler
5) Fuel mixture ratio: Make sure the oil mix is per your manufactures recommendations
6) If after the above the engine is still smoking and blubbering:
Adjust carb mixture screws to a 'less rich' setting
*NOTE: only move mixture screws 1/8 of a turn at a time,
and try operation before any more adjustment

Nov 12, 2009 | Echo Garden

1 Answer

Engine will only run on 1/2 Choke


Hello edv40026:

Have you Checked the Exhaust Port and Muffler for Restriction?
From your Description it Sounds like the Exhaust Port or Muffler is Restricted with Carbon Deposits, the Carburetor Metering Pump Actuator Gap is Incorrect or the Compression is Low (Worn Rings/Cylinder).
>>The Following is a Basic Instruction File for Doing a Diagnostic on the Engine for this Problem. Any Input is Appreciated.
>>**Remove the Muffler and Make Sure the Exhaust Port is Clear.
>>If it is, then Try to Start the engine with the Muffler Off.
>>If it Starts and Runs Properly, then Clean the Spark Arrestor Screen in the Muffler or Replace the Muffler if Required.
>>The Following is a Basic Instruction File for Doing a Diagnostic on the Engine for this Problem. Any Input is Appreciated.
>>**Remove the Muffler and Make Sure the Exhaust Port is Clear.
>>If it is, then Try to Start the engine with the Muffler Off.
>>If it Starts and Runs Properly, then Clean the Spark Arrestor Screen in the Muffler or Replace the Muffler if Required.
Is the Fuel Line from the Fuel Filter Staying Full of Fuel?
The Carburetor Metering Jet Actuator is Set so the Pump Diaphram Dowl is Just Touching the Actuator Arm. These Components are Located Under the Cover with 4 Small Screws Holdong it to the Carburetor Body.
Please, Do Not Hesitate, If you Hit a Snag or this Does Not Correct the Problem, I am Here if You Require More Assistance.
Hope this Helps. Let me Know What Happens, Please. May the All Mighty Bless You and Yours. Be Safe and Be Happy. Thanks.

Good Luck

Respectfully

jbridger (John)

May 13, 2009 | Craftsman Garden

1 Answer

Difficulty starting. When it does start it will only run for a short time at a slow speed before stopping.


Hello

>>The Following is a Basic Instruction File for Doing a Diagnostic on the Engine for this Problem. Any Input is Appreciated.
>>**Remove the Muffler and Make Sure the Exhaust Port is Clear.
>>If it is, then Try to Start the engine with the Muffler Off.
>>If it Starts and Runs Properly, then Clean the Spark Arrestor Screen in the Muffler or Replace the Muffler if Required.
Please, Do Not Hesitate, If you Hit a Snag or this Does Not Correct the Problem, I am Here if You Require More Assistance.
Hope this Helps. Let me Know What Happens, Please. May the All Mighty Bless You and Yours. Be Safe and Be Happy. Thanks.

Good Luck

Respectfully

jbridger (John)

May 11, 2009 | Garden

1 Answer

Runs good without air filter, but badly with air filter. New air filter no help. The engine was partially submerged in hurrican Ike and a new carburator was just installed. With air filter in it runs very...


Hello

Check the Exhaust Port and Muffler.
>>The Following is a Basic Instruction File for Doing a Diagnostic on the Engine for this Problem. Any Input is Appreciated.
>>**Remove the Muffler and Make Sure the Exhaust Port is Clear.
>>If it is, then Try to Start the engine with the Muffler Off.
>>If it Starts and Runs Properly, then Clean the Spark Arrestor Screen in the Muffler or Replace the Muffler if Required.
If the Exhaust Port and Muffler are Clear, then
Check the Carburetors Metering Needle Valve.
If the Metering Valve Plunger (on the Carburetor Metering Jet Diaphram) is Set too Close to the Needle Valve Actuator Arm, then you will have this Problem.
I Require the OEM and Model Numbers Off the Carburetor to be of Better Assistance to you.
Please, Do Not Hesitate, If you Hit a Snag or this Does Not Correct the Problem, I am Here if You Require More Assistance.
Hope this Helps. Let me Know What Happens, Please. May the All Mighty Bless You and Yours. Be Safe and Be Happy. Thanks.

Good Luck

Respectfully

jbridger (John)

May 09, 2009 | Garden

1 Answer

Husqvarna looses power after 10-15 min.


Hello Matt:

From your Description it Sounds like Either the Gas Cap is Not Venting the Tank, the Exhaust Port/Muffler is Restricted or the Rings are Worn Out and Require Replacing.
Make Sure the Gas Cap Allows Air into the Tank.
If the Gas Cap is Good, then
>>The Following is a Basic Instruction File for Doing a Diagnostic on the Engine for this Problem. Any Input is Appreciated.
>>**Remove the Muffler and Make Sure the Exhaust Port is Clear.
>>If it is, then Try to Start the engine with the Muffler Off.
>>If it Starts and Runs Properly, then Clean the Spark Arrestor Screen in the Muffler or Replace the Muffler if Required.
If the Exhaust Port and Muffler are Clear, then Most likely the Rings are Worn and Require Replacing.
Please, Do Not Hesitate, If you Hit a Snag or this Does Not Correct the Problem, I am Here if You Require More Assistance.
Hope this Helps. Let me Know What Happens, Please. May the All Mighty Bless You and Yours. Be Safe and Be Happy. Thanks.
Good Luck

Respectfully

John

May 08, 2009 | Husqvarna 28cc Gas Line Trimmer

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