Is This Briggs Intek About To Blow Up?

[JonnyBlaze]

18.5hp 31N707 3374 G1 101130ZD

I made a video. Sounds baffley? Previous owner said it ran good when parked last fall. Started it a couple days ago and sounds like this. No oil leaks. Oil looks clean. No metallic clicking or ticking.... Thoughts?

https://youtu.be/PRScYuCLk1Q

 

[Russ2251]

What do you mean by "blow up" ?

Sounds like it's running rich.

 

[JonnyBlaze]

What do you mean by "blow up" ?

Sounds like it's running rich.

I wear hearing aids so its hard to tell. Maybe its mild backfiring I hear...? Maybe I'm just being paranoid. Lol.

 

[tom3]

Does that have a hand choke for starting? Try closing it some and see if the engine runs worse or better. Could be something bent the choke cable?

 

[dfbroxy]

check valve lash and clean carb.

 

[Fish]

Take off the valve cover and take a peek at things. Watch the rocker arm action while turning the engine over by hand. look for sticking valve and see if the valves both move @ the same depth when engaged.

 

[Boobala]

check valve lash and clean carb.

I'll SECOND that idea ! .. :thumbsup:

 

[JonnyBlaze]

Will tackle it tomorrow. Thanks guys!

 

[7394]

Yank the spark plug also, & when you rotate it, hold your thumb over the hole.

PS: Check the air filter. Doesn't sound very robust,..

Have any rodents made a nest in the exhaust ?

 

[JonnyBlaze]

Today I pulled the carb and it was spotless. 8 found the spring disconnected and hooked it back up and it made no difference.

I pulled the valve cover and found that the top valve had a half inch or more of gap and the cup was laying at the bottom of head. The adjustment bolt is still tight so I wonder if the engine has internal damage? I'll adjust the valves tomorrow. I pulled the rod and it is straight and the rocker moves as it should when I turn the engine by hand and hold the rocker in place.