Pirate Lady
Well-Known Member
Speaking of which, i was in the store buying bottom paint today, and on the wall they had a list of reman long blocks and prices. No 7.4. Had 8.1. is 8.1 a bored out 7.4?
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thanks, i guess they just dont have any 7.4s there now.Nope. The 8.1 is GM's metric motor. The 7.4 can be bored and stroked to increase its size but usually call it a 496.
Obviously, not practical if you are re powering, but for a new build IMHO its the only way to go.Well Jim I agree about OBs being easier to winterize. But (always a but), was at boat store today, merc 175 was 16k. Takes 2 at 32k to make the same power as 1 7.4 for 7-8k. So for me - No.
I've used these kits for many years. I don't know which one the OP used, but mine did indeed come with instructions.Marcus:
Early on, didn't you say you used a commercial winterization kit of some sort to add polypropylene anti-freeze. If that's right, were there instructions?
If it was indeed drained first there should have been no water left to freeze. Adding the AF should have done no harm (you would think).Marcus said:
"As far as winterizing, the procedure I followed was to run the engine in the water until it was at normal operating temps, then on my lift (engine off) I drained it completely through the seawater drain. Then, I attached earmuffs connected to a CAMCO winterizing kit and let the engine pull the propelyne glycol through until it began expelling through the prop. Shut off, done."