OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Hand and Power Tolls Power Tools soft start engines- how to compression test?

Can anyone on the board tell me how to compression test a single cylinder mitsubishi generator engine with soft-start incorpoated i.e how do you disable soft start so that you get true compresion test rather than a false reading. I can't find any visble mechanism such as a decompressor externally. any ideas gratefully accepted
thanks, NZ635

nz635,

You will not see a decompresser as it is in the valve lifter system.

Thanks Bruce, so if you were doing a compression test how would you go about it in order to get a true reading?. Can you over ride the valve lifter, or is it a case that you can't actually perform a compression test

Thanks NZ635

nz635,

If you pull the engine over a few times you should get a reading unless the valve clearance is not correct or the head gasket is leaking.

Is your reading over 70?

Thanks for the info, i'll give it a try and get back to you if it isn't over 70- have a good day.

NZ635