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  1. M

    Small hole in hull.

    Had this chip on the bottom of my boat about 15 years ago. Assumed it was just gelcoat but every trip it would blowoff. Thought nothing about it but this year I was like lets see why nothing will stick. Well I grounded it all out and realized it was a small hole. Dont know where it goes into...
  2. M

    Mercruiser Alpha 1 vs SEI

    Im going to call this morning and see what they can do. The boat is 32 years old but its in pristine shape and always stored inside.
  3. M

    Mercruiser Alpha 1 vs SEI

    Um, total we had a catastrophic failure on out 1990 Alpha 1. Driving at 2500rpms and BOOM dead motor and came to a standstill. Motor woukd not turn over. Felt like we hit a sub merged log. Wouldnt crank over.. Got towed 3 miles back and I could smell random gearlube. Got back, towed home...
  4. M

    1990 5.7. 260 Overcooling at idle.

    Im wondering if I should pull the risers and see if I got all 4 slots open like the merc bullitin. If I do that Im half temped to go back to the restricted.. Keep it at 900-1000 rpms, zero issues
  5. M

    1990 5.7. 260 Overcooling at idle.

    I did replace it with the newer 160. So I should plug the T stat housing hole and put it in the intake?
  6. M

    1990 5.7. 260 Overcooling at idle.

    Should I move the temp sensor to the intake manifold or leave it in the thermostat housing?
  7. M

    1990 5.7. 260 Overcooling at idle.

    It does not. Per the parts guide and post #11 there are no balls and rod on the Type III cooling version. The balls and rod is on the type II thermostat housing.
  8. M

    1990 5.7. 260 Overcooling at idle.

    Starboard is always hotter in my case by a good 20*
  9. M

    1990 5.7. 260 Overcooling at idle.

    Temps are right on par with temp gun I borrowed from work. On the rare occasion itll bounce up to 160* and back to 100 within 5 seconds and do that for a few minutes then lay back on 100. Like I said its been doing this for 10+ years but its finally bugging me to the point that it shouldnt be...
  10. M

    1990 5.7. 260 Overcooling at idle.

    Bringing this back up. Replaced thermostat with OEM Merc along with plastic spacer and I have identical results. Again, over 1000rpms. PERFECT cooling. Trolling or idling around the river itll drop to below 100 like its over cooling. I have the non restrictive manifold gaskets with 2 hose...
  11. M

    mercruiser 5.0 head gaskets new felpro..not stainless steel?

    I've had the felpro on my 350 build since 2007. Zero issues in freshwater...
  12. M

    Through Hull Exhaust too loud?

    I run Corsas Q&Q On my Chaparral. Not cheap but soooooo nice.
  13. M

    1990 5.7. 260 Overcooling at idle.

  14. M

    1990 5.7. 260 Overcooling at idle.

    Yup, it's the K&N FA. USCG number on the steel lid and the FP is a new MerCruiser with line to the 1409 Edelbrock. Just had to get a new FP as the other one had fuel in the clean line. When ingrt home from my trip ,I'm going to pull it apart and see what's up.
  15. M

    1990 5.7. 260 Overcooling at idle.

    I thought about this a few years ago when I had one leak into the motor over winter. Pulled my plugs to check before starting up and antifreeze was on all the plugs on the port side and in the oil. Pulled riser and there was a puddle in there. I cant remember what I used. Should prob pull them...
  16. M

    1990 5.7. 260 Overcooling at idle.

    On another note, the engine came with the 2nd design 6 port thermostat housing but was cracked and rusting. I now have the 3rd design housing if that makes any difference .
  17. M

    1990 5.7. 260 Overcooling at idle.

    I was thinking that as well. I put a new mercruiser 143* in there back in 2007 when I got the boat. I'll check. yea no saltwater here. Usually inland lake or Lake Erie and most times that waters 40* -60* degrees. I'm going to pull it off and change it. See what's up. We were out today and...
  18. M

    1990 5.7. 260 Overcooling at idle.

    I've had this issue for about 10 years now and although it's been fine and havent given me any issues I figure in should figure out whats wrong as I'm using the boat more and more this year. I have a 143 stat in there, gauge works fine. But after ideling around the river it'll drop to 100 and...
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