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  1. IslandExplorer

    Ford Mercruiser 188 Rehab and Cooling

    Interesting that they used a Y pipe on those systems you mentioned. Was that for convenience or is there an advantage vs just 1 larger seawater pump?
  2. IslandExplorer

    Ford Mercruiser 188 Rehab and Cooling

    It is a really simple looking exchanger, much like the San Juan units I've seen. Has only 4 ports other than 2 small threaded drain or vent holes, 2 coolant, 2 raw water. It's supposed to be a triple pass I think. Made by Sen-Dure.
  3. IslandExplorer

    Ford Mercruiser 188 Rehab and Cooling

    The system I read about that sounded the most like mine had the engine coolant controlled by the thermostat with a small bypass passage to keep coolant flowing through the exhaust a little even when thermostat is closed fully/still warming up. Going to have to find one like that probably. The...
  4. IslandExplorer

    Ford Mercruiser 188 Rehab and Cooling

    I wasn't able to find an 888 full cooling sytem setup example from Mercruiser. This model seems like it wasn't as common so maybe there wasn't a factory full system setup, I don't know. Since the parts are rare if not non existant anyway- I am fine with doing a non standard setup/ copying...
  5. IslandExplorer

    Ford Mercruiser 188 Rehab and Cooling

    Also, after thinking about it more, I am leaning toward not using the X raw water block. Like you said, without proper tear down and rebuild I just can't clean it that well.
  6. IslandExplorer

    Ford Mercruiser 188 Rehab and Cooling

    Good point, I'll definitely need to keep the pump in there then. I already have a new one anyway. Too bad those pumps don't put out more flow bc it would be nice to use it for the heat exchanger and be done. If I kept the pump but removed the hose by the bellows and sealed the transom pass thru...
  7. IslandExplorer

    Ford Mercruiser 188 Rehab and Cooling

    Thanks for the quick reply Scott, I will be running a full system so that the risers and HX will be the only raw water cooled parts hopefully. Definitely good to know the drive still needs to be cooled. Was really hoping to lose the drive pump though! Maybe I'll replace it with a drive shower...
  8. IslandExplorer

    Ford Mercruiser 188 Rehab and Cooling

    Hello, I have a 1974 Mercruiser 188 / Ford 302 2V V8 with 888 (MC1 outdrive) that I have been working on. After pulling it from the boat for further inspection I have decided that the corroded log manifolds cannot be trusted so they will be replaced with nice new ones. I am working on...
  9. IslandExplorer

    1974 Chieftain 25 "Adventurer" Restoration

  10. IslandExplorer

    1974 Chieftain 25 "Adventurer" Restoration

    454 big block heat exchanger for the small block. Passages inside look really clean, no tubes blocked off or evidence of repairs that I have noticed so far.
  11. IslandExplorer

    1974 Chieftain 25 "Adventurer" Restoration

    Thanks! Just grabbed a sweet 454 big block heat exchanger for the ol girl. Gotta protect the Ford Dino-drive you know. 🦖 Saves me the giant hassle of moving the distributor alll the way to the back.. lol Definitely going to paint it and get all that done before next season now that I have the...
  12. IslandExplorer

    1974 Chieftain 25 "Adventurer" Restoration

    Starboard log Port log Manifolds and Risers off to be cleaned and inspected later. Both sides have lots of old river sediment and rust flakes. Going to scrape it out and see what it looks like afterwards.
  13. IslandExplorer

    1974 Chieftain 25 "Adventurer" Restoration

    The HP robbing log manifolds I have would be fine for my cruising purposes other than all the corrosion inside that would clog an exchanger. I want to keep the original Y pipe setup so I am not complety redoing everything so I don't think I will be converting to Osco's or anything. Is there a...
  14. IslandExplorer

    1974 Chieftain 25 "Adventurer" Restoration

    I am considering swapping all the marine parts over to another 302 block I have. This block has never seen anyrjing but coolant in its passages. Need to find out how compatible it would be with its truck cam and standard 302 firing order. Any comments/ideas on this are welcome. But please keep...
  15. IslandExplorer

    1974 Chieftain 25 "Adventurer" Restoration

    Stbd front end cap: Some evidence of rust present inside. Stbd rear end cap: No manifold bolts broken or needing anything more than a 3/8 ratchet, very lucky. Guessing everything must have been assembled with antiseize, been seeing grey on mostly unrusted bolts. A number of things like this...
  16. IslandExplorer

    1974 Chieftain 25 "Adventurer" Restoration

    Starboard log exhaust manifold disassembly: Nuts, bolts, and studs came right out luckily. A view down the ol log flume 🪵 Risers appear to have block off plates with just a small vent hole pass through in one passage to log.
  17. IslandExplorer

    1974 Chieftain 25 "Adventurer" Restoration

  18. IslandExplorer

    1974 Chieftain 25 "Adventurer" Restoration

    The oil pump shaft is down in this hole. It wiggles around and turns but won't lift out even with 5 different powerful magnets, what a pain.
  19. IslandExplorer

    1974 Chieftain 25 "Adventurer" Restoration

  20. IslandExplorer

    1974 Chieftain 25 "Adventurer" Restoration

    So, there have been a whole number of things that have happened and changed since the last post. Engine was in and running, was working on timing and carb tune, things were moving along. Unfortunately the oil pump driveshaft beneath the distributor that I was desperately trying to replace- is...
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