Re: 1973 starcraft ss restore in progress
well we got a week off rain here so tonight i tinkered with engine abit. i bought a cheap spark tester from autozone, and tested spark on all 4 cyl. happy to say i got good strong ,blue spark on all cylinders. now it went a bit south on me and i am a bit befuddled. last dec in 20 below, and poor cranking conditions i got 95 psi compression on 3 of 4 cylinders and 85 on the other. felt like they would get better in warmer temps. well tonight i tried again using same proceedure. carbs wide open, well charged battery and carbs and holes have had some fog oil in them. the part that befuddles me is tonight i get 75 psi on 3 and 50 psi on the other. seems to be cranking good , but cables are poor and maybe not cranking as fast as should. any ideas as to why those compression numbers would fall like that. granted engine is not warm ( running temp)and cables may be poor but all is same as last december in colder conditions.why did they fall off, and 50 to 75 if accurate can't be good can it? may have had a bit of a setback here. any ideas, or input would be greatly appreciated as always. thanks (ps gonna post same question in outboard forumn, but value all your thoughts )