Oil Pressure

[wwcw]

I "adjusted" my 8N carborator and now can not get it to run longer than 5 seconds.

When I try to start it, I do not get any oil pressure. I have replaced the gage, cleaned out all the oil tubes and checked the pickup tube which is in place and attached.

I have also left one of the tubes unattached and oil does not flow out of it when trying to start the engine.

I have also put 80wt oil in pressure relief hole.

Should I be getting oil pressure? Any last minutes suggestions of things to try before I remove the pan and go after the oil pump?

Thanks!

 

[Dan]

Drain the oil, reach up through the oil drain hole and see if the pickup tube wiggles. It is common for these to crack and keep the oil pump from picking up oil from the pan. If it is loose, you need to drop the pan and replace/fix it pronto. You can alway reuse the oil if it is new-ish or in good shape.

Dan

 

[HCooke]

Might have to run more than 5 sec for the oil pressure to come up. Depends on the condition of the oil pump and the bearing clearances and the oil temp and viscosity. Are you shuting the engine down after 5 sec because there is no pressure or will the engine not run longer than that?
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[Danny in CO]

You may need to prime the oil pump. There is a large (15/16" I think) plug by the water pump in the front of the block. Take it out a squirt oil in there until it is full.

Good luck,
Danny

 

[wwcw]

Thanks for the quick replies.

Engine does not run longer than 5 seconds and during the 5 seconds it is just barely running.

I did check the pickup tube and it is connected solidily and does not wiggle.

I did try and prime the pump with 80wt oil and tried with 30wt oil also.

 

[NOXJohn]

I would prime the oil pump and jump starter with a 12 volt battery with plugs removed, out of gear and key off. Jump 12 volt battery to only the front bolt on solenoid so you don't back feed 6 volt battery or it could blow up. Make sure transmission is in neutral because starter will spin as soon as second jumper connection is made. If you can't get 5 pound or so of oil pressure this way you have a problem. Once you are sure you have oil pressure you can work on your other problem. Never start an engine that will not build up oil pressure.

 

[wwcw]

Thanks NOXJohn!

I have a 12 volt system so I am assuming that I should remove the plugs, prime the pump, and try to start it with the key off and switch on.

 

[wwcw]

NOXJohn,

Did what you suggested and got no oil pressure at all. I guess it is on to the oil pump.

Thanks for the test information