Mitsubishi KE75 2 Cylinder Bolens 172

[rwblessi]

We recently purchased a a 1979-81 Bolens. Has the KE75 2 cylinder engine. It ran last year we were told but sat over winter.

It cranks, plugs heat, seems to be getting fuel, has compression but it won't even hint of firing. It does smoke some from the exhaust after multiple repeat rotations.

I read in other forums that compression is critical needing (400) much more than a gas engine. Compression out the glow plug holes seem quite high but don't have a proper guage to test. If compression is true, short of a ring and valve job, it there any way to resolve if this is the issue.

Any other suggestions to get it going?
Roland

 

[mit]

does it have a block heater?if it does not put one on.
make sure battery is fully charged to be able to crank at hi rpm.use a charger booster if necessary.put some diesel addative to the fuel. if you are having black smoke while cranking you are almost there.it will start.
let it rest for a few minutes reheat the plugs and crank it up.repeat this process until you get it going. keep the battery charged while starting.
when you have the block heater in it is going to start a lot faster.just plug the block heater in for a hour before you want to start it.with the block heated .you then heat your plugs and crank.if the battery is strong it will spin fast and start.
good luck.

 

[lens12]

First thing I'd do is bleed the fuel system to make sure there is no air in the fuel system.

 

[ncwtractorparts]

Check to see if you have good fuel pressure going to your injector nozzles by
cracking the fuel lines at the injector nozzles on the cylinder head to see if you are geeting fuel pressure. This is to check to see if your fuel pump
doesn't have a sticking plunger on the outer delivery valve, ruling out the fuel
pump. If you are getting good fuel pressure and you have taken the glow plugs out and have tested them to make sure they are good. Getting fire to them does not mean that they are good. test them with live voltage current.

If you are getting good fuel pressure, and the glow plugs are good, and that you have replaced your old fuel with fresh fuel and the filter is clean or replaced and the tractor still does not start then the next thing to do is to
check your injector nozzles. If this tractor sat for a long time the needle plunger in the injector could siezed in the closed position restricting the
fuel pop off spray.

If you need more help, give us a call.