Why does the starboard side go BOOM?

[drgboat]

I've been looking for a starboard side head for my 1982 Johnson 150.
No luck, it seams that every 150 that is out there for parts has a bad starboard side.
What gives? Why is it always this side?

What other size heads and carbs can I use to make this FLY ?

What casting numbers----- from what years? Who has them ?!?

It's on a Sleekcraft Executive 23 that we use to tube and ski with three kids.

Please give me your opinion !

by post or pm

[drgboat]

Well, you know, as fly as you can get with a 150 on a 23 foot Sleekcraft day criuser. LOL

[EMDSAPMGR]

Here is some info on heads to look for regarding the 149 cubic inch blocks. In descending order of compression ratios:
320644/643. 1976 200 heads. Highest compression stock OMC heads. Some of these heads may have been modified due to a 1976 OMC service bulletin- to decrease compression. Modified heads are the same as the 235 heads of 1977 and 1978. Unmodified, undamaged heads very rare. 329872/873. 1977, 1978 235 heads. Great heads. Many more around. 323457/456- Heads from 1977-1979 150,175 and 200. Slightly less compression than the 235 heads, but not bad. Many still around. 329772/773. 1983-1985 XP/GT heads. These are actually the old 77-79 457/456 heads, but with a .40 extra lip on the seal face, to lower compression. You can machine the .40 off and have the 456/457 head. Any of the above heads should provide an improvement over what you have now. Should you use any of these heads, you will need to pay attention to jetting, timing and octane requirements. You don't want to run lean. Don't buy any that are pitted on the firing face. There have been 2 sets of 1976-200 heads sold on ebay in the last 2 months.

[neveredge]

You forgot about the CCC heads. I will post the part numbers after I get out in the garage to see what they are. I believe these were the highest compression heads made for the small bore crossflow.

[aircraftman]

they blow the starbord side to provide us with an overabundance of port side heads.

[drgboat]

Thats funny