Export thread

Hello gang , I have an Craftsman 550 Series Briggs & Stratton Engine Model No. 944.361300 . My blade hit a metal post couple of times , and the last time the engline start to be less strong , like if the motor does't run as fast. Check these videos please. Can this trouble and weak power can be cause by the shaft ?

Link to videos : https://filebin.net/8pu5cu1oyu7s00ui

dieselb0y said:

Hello gang , I have an Craftsman 550 Series Briggs & Stratton Engine Model No. 944.361300 . My blade hit a metal post couple of times , and the last time the engline start to be less strong , like if the motor does't run as fast. Check these videos please. Can this trouble and weak power can be cause by the shaft ?

Link to videos : https://filebin.net/8pu5cu1oyu7s00ui

Click to expand...

It probably sheared the flywheel key (Alum) and is out of time (ignition timing)....remove flywheel to find out, then replace it if it is sheared (broke)

Hey thanks for your reply mower king! Here is pictures of the flywheel key , not broke , but sign of wear .... sorry for the low quality of the pictures . You think thats the cause of the problem ?

dieselb0y said:

Hey thanks for your reply mower king! Here is pictures of the flywheel key , not broke , but sign of wear .... sorry for the low quality of the pictures . You think thats the cause of the problem ?

Click to expand...

I can't tell 100% by the pics but, the key does not look sheared, sheared is usually split into 2 pieces.

Yeah exact , thats why I suspect more the shaft. What do you think about the shaft when you look at the video ? Seems to be bend enough to cause the trouble ?

dieselb0y said:

Yeah exact , thats why I suspect more the shaft. What do you think about the shaft when you look at the video ? Seems to be bend enough to cause the trouble ?

Click to expand...

I couldn't get the videos to open but, a bent crankshaft is never a good thing either....does it vibrate after the impact?

Oh ok , it will be easier for you after watching these three videos

dieselb0y said:

Oh ok , it will be easier for you after watching these three videos

Click to expand...

Bent crank for sure, that will vibrate bad!

Hey hey thanks Mower King.

dieselb0y said:

Hey hey thanks Mower King.

Click to expand...

Unfortunately, most of the time, it's not cost effective to replace a crankshaft in a push mower......unless it's a real high dollar mower. Might be time for a new mower!

mower king said:

Unfortunately, most of the time, it's not cost effective to replace a crankshaft in a push mower......unless it's a real high dollar mower. Might be time for a new mower!

Click to expand...

Well said!

Check around some of the independent mower shops to see if they have an in the engine crankshaft straightener. If you take the engine off and take it in may not cost much. I charge $50 if the engine is off the mower.

Hey its me again . I have a new lawn mower now so my girlfriend is now happy to see the clean cut grass when she wake up in the morning.....but ....I'm not able to trash away my old one ....maybe to sentimental....and I have a doubt that only a bent shaft would make the low engine sound that you hear on the clip... and the lawn mower doesn't vibrate a lot even if the shaft is bent . Maybe I miss something and there is another thing who make the motor to run low. What do you think ?

You might call around local shops, there are a few that still "straighten" cranks.

dieselb0y said:

Hey its me again . I have a new lawn mower now so my girlfriend is now happy to see the clean cut grass when she wake up in the morning.....but ....I'm not able to trash away my old one ....maybe to sentimental....and I have a doubt that only a bent shaft would make the low engine sound that you hear on the clip... and the lawn mower doesn't vibrate a lot even if the shaft is bent . Maybe I miss something and there is another thing who make the motor to run low. What do you think ?

Click to expand...

Hey...don't hit / impact anything with your new mower.....you want to keep her happy!!

mower king said:

Hey...don't hit / impact anything with your new mower.....you want to keep her happy!!

Click to expand...

Loll

I have oil on the spark plug , maybe a blown piston seal , I lost a lot of oil after the impact.

dieselb0y said:

I have oil on the spark plug , maybe a blown piston seal , I lost a lot of oil after the impact.

Click to expand...

Pistons.......uh....don't have seals!

mower king said:

Pistons.......uh....don't have seals!

Click to expand...

I mean ... the seals that keep oil from leaking into the combustion chamber

And people always wonder why I always recommend mowers with swing back blades on a disc.
Pity you can not get them in the USA any more

bertsmobile1 said:

And people always wonder why I always recommend mowers with swing back blades on a disc.
Pity you can not get them in the USA any more

Click to expand...

I am surprised that as dangerous as a mower is you can even buy one. Since America is into the new sport of outlawing ANYTHING that someone THINKS might be dangerous and if you disagree you want to kill children. They want to outlaw all knives and most schools have dropped shop classes, too dangerous. Playgrounds have taken out climbing structures. The insanity is mind boggling. The small town/state tin god poloticians want to legislate absolute saftey (translated as total control) "for the children"
Looks like i need another cup of coffee.

The oil is likely from turning over the engine.

Fish said:

The oil is likely from turning over the engine.

Click to expand...

Yes good chance thats happen! . Maybe this video will give you more clue. Here is a video without the air filter and with me playing with the carb spring.

dieselb0y said:

Yes good chance thats happen! . Maybe this video will give you more clue. Here is a video without the air filter and with me playing with the carb spring.

Click to expand...

I have seen some push mowers with carbs like that, not run right and act like that because of the air filter housing stud not in the carb, see if you install the air filter housing and stud tight, if it changes it.