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Recent content by 98BaronMag

  1. 9

    1998 Mercruiser 5.7 TBI Backfiring Under Load & Loss of Power

    I apologize for such time passing before I updated you folks. I replaced the head gasket and reassembled. Compression test after reassembly showed Cyl 4 (previously at 35 psi) now at 190. seemed to fix that. Cyl 2 and 8 at previous numbers. Cyl 6 still at 0. I put a small amount of oil in...
  2. 9

    1998 Mercruiser 5.7 TBI Backfiring Under Load & Loss of Power

    Alright, I got back to it today. Removed everything in the way and removed the valve cover and exhaust manifold. Cranked it to verify full/proper motion. Everything seemed in order. Then, I removed wiring and distributor and pulled the intake manifold and the starboard side head. Head gasket had...
  3. 9

    1998 Mercruiser 5.7 TBI Backfiring Under Load & Loss of Power

    @Droid How would I go about determining warped head/block?
  4. 9

    1998 Mercruiser 5.7 TBI Backfiring Under Load & Loss of Power

    I'm thinking head gasket right now, because the oil level seems quite high, but no gas smell. Headgasket could explain coolant (water) elevating the oil level. I'd never notice milky oil, since I don't check it immediately after running. Plan to drain the oil and check for water the next...
  5. 9

    1998 Mercruiser 5.7 TBI Backfiring Under Load & Loss of Power

    Well folks, I think we've identified a major problem here. Did a compression test today and the results are as follows. Cylinder numbers are basic chevy 350 pattern. Cyl 1 200psi Cyl 3 185psi Cyl 5 190psi Cyl 7 195 psi Cyl 2 198 psi Cyl 4 35 psi Cyl 6 0 psi Cyl 8 200 psi Seems like we're looking...
  6. 9

    1998 Mercruiser 5.7 TBI Backfiring Under Load & Loss of Power

    Hello all, I've been pouring over dozens of old threads the last few weeks trying to sort out some issues I'm having, but was mostly just trying small, inexpensive fixes. After this weekend, I decided to find a shop to work on my boat. Unfortunately, no one in my area particularly wants to work...
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