422 is getting hard to start

[MuncyBob]

This summer I rebuilt the carb, installed new plugs and fuel filter. Toward the end of the summer I noticed it had to tn over more than usual to start. Now that colder nights are here I am having to turn it over a few times....wait and repeat until finally it starts. She runs fine once running and when the engine is hot she starts right up.

Approaching 500 hours....would a valve adjustment needed be the main cause here?

 

[Transit]

Rebuilt the carb. Ok, is there any choke mechanism to assist in enriching the mixture or adjustment?

 

[MuncyBob]

Yes...has manual choke... it works and is used properly.

 

[Gravy]

Yes. Adjust the valves. Mine needed it well before the recommended time. It ran much better after the adjustment.

It's a pain, but do it anyway.

 

[MuncyBob]

For those that have adjusted the valves themself...any tips other than swear a lot?

 

[MossRoad]

For those that have adjusted the valves themself...any tips other than swear a lot?

Yeah, you have to drink a lot, too! :laughing:

 

[Gravy]

The adjusting part is trivially easy if you've previously done a number of valve adjustments on assorted engines.

Turning the crank to just the right position? Not so much...

 

[MuncyBob]

I've never done a valve adjustment...but seems fairly straight forward from the service manual. Guess I'll be swearing & drinking a lot!

 

[MossRoad]

Guess I'll be swearing & drinking a lot!

Welcome to TBN! :laughing:

 

[washita]

here are pictures of how I modified my 425 to make life easier when adjusting valves

 

[MuncyBob]

Interesting....the pics are a bit blurred on my pc but appears you cut out the middle section of the rear tub area and somehow placed screen or mesh over it?

 

[washita]

1/8'' aluminum plate with 3/16'' holes fastened with #18 self tapping screws, not shown was the plastic snap cover that covered the hole in the plastic engine shroud. I figured time and effort for modifications was well spent considering how difficult it is to properly adjust the valves