1984 70 Evinrude Rebuild - Help!

[Bonito2009]

I have recently rebuilt a 1984 70 Evinrude which consisted of boring out .030 over all three cylinders. I have now experienced a reduced compression in number 1 cylinder which presents as a dry carbon field cylinder when the I pulled the head. Other symptoms that I have experienced is the inability to idle; however, when the primer/choke is pressed, it kept the engine from stalling.

Recent advice on the problem suggested that I have been running tool lean and that I should have increased/drilled the main jet in all carbs to accommodate the increase .030 cylinders.

I am pleading for assistance on this project as I have spent an endless amount of time on trying to get this motor functioning.

Thanks.

[Faztbullet]

Forget the advice on drilling jets as they must be reamed to size. I have seen jets drilled bigger acutally run leaner.Here is part numbers for bigger sizes,yours should be a 52D and a 54D should be right on. As for compression being low are you seeing any scuffing in bore and how low is lower?

53D.....321297
54D.....321407
55D.....320921

[Bonito2009]

Faztbullet, thank you for the reply.

Compression test on #1 was 80, #2 was 125, and #3 was 130. The cylinder walls on #1 have some scuffing in mainly the 6 o'clock position but not the deep grooves that were their prior to the rebuild if I can use that as any gauge.

Thanks for the help.

[kencat]

What did you mean by this "number 1 cylinder which presents as a dry carbon field cylinder when the I pulled the head" ??

What are the differences compared to the other two cylinders?

Pics?