Briggs 18.5 Intec engine locks up

[Ray81]

Nube here: My Briggs 18.5 engine locks up when trying to crank it. Without the sparkplug it spins real fast and has good compression. I have no gauge but it blows my finger out of the hole with a lot of pressure . I pulled the head and the valves are not stuck. The pushrods were opening the valves as best as I could see. What else can I do? :confused2:

 

[Mikel1]

Is it the right spark plug and were valve clearances good?

 

[LaWn GuY]

Common on OHV engine's, sounds like your valves need adjusting.

 

[pugaltitude]

Either valve clearance or your decompressor has broken which
Is on the end of the camshaft.
Engine Valve Maintenance & Repair | Briggs FAQ

Sometimes you tube is helpfull.

 

[Tinkerer200]

I can send you detailed Instructions for adjusting the valves which includes a Compression Release test IF you like. Address below, put in proper format and remind me engine model number and what you want.

Walt Conner

 

[Tinkerer200]

I can send you detailed Instructions for adjusting the valves which includes a Compression Release test IF you like. Address below, put in proper format and remind me engine model number and what you want.

Walt Conner

Well would have been nice if I had actually included address.
wconner5 at frontier dot com