4hp Chrysler

[carleton]

I am having a problem with this 4hp Chrysler model 42H79F.I have gas and a spark but it want hit a lick.Where should I look for where the problem could be?
Thank you
Jack

 

[wickware]

Re: 4hp Chrysler

Pull the plug and check for compression. With a gauge it should be close to 90-100 in 3-4 pulls IMO. Without a gauge you s/n be able to hold the compression in with your thumb or finger. It takes Spark/Fuel/Compression To Fire!!

 

[carleton]

Re: 4hp Chrysler

Pull the plug and check for compression. With a gauge it should be close to 90-100 in 3-4 pulls IMO. Without a gauge you s/n be able to hold the compression in with your thumb or finger. It takes Spark/Fuel/Compression To Fire!!

Compression is good.What am I missing?
carleton

 

[IamCanadian]

Re: 4hp Chrysler

is the spark strong and blue? is the timing set right?

 

[Frank Acampora]

Re: 4hp Chrysler

Assuming it is the two cylinder, water cooled 4: Are the plug wires on the correct cylinders? If they are switched, it will spark 180 degrees out of timing. It will not fire and will not even backfire. It will just sound like it is not getting either spark or fuel.

 

[carleton]

Re: 4hp Chrysler

is the spark strong and blue? is the timing set right?

The spark is not blue it is orange.The timing is set by the key and it is in place.

 

[carleton]

Re: 4hp Chrysler

It has only one spark plug.

 

[wickware]

Re: 4hp Chrysler

What year model related to Mag or electronic ignition?
Have you changed the plug?
If Mag Sys, have you checked the point?s condition?
When did it last run with good performance?
Do you have the history of the past that led to this matter?

 

[carleton]

Re: 4hp Chrysler

I bought it and it would run very ruff. I put a new carb. and a new set of points on.Has not started since.

 

[wickware]

Re: 4hp Chrysler

Please post a pic of the new set on points you installed (up close but showing all the inside of the magneto system. Please post your steps and specs of setting the points. Such as: .030 at TDC which is only an example vs correct. No harm intended in this info vs trying to help you. Attached is my 1970 35 HP Chrysler Mag sys If You Have Not Seen It Before. LOL! I feel we'll have this Monster running soon.