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    98 mercruiser 4.3 port side exhaust manifold runs 50 degrees hotter than stbd side

  2. I

    98 mercruiser 4.3 port side exhaust manifold runs 50 degrees hotter than stbd side

    I have the 1998 Mercruiser 4.3 Alpha carbed motor. The San Juan Engineering MC321 FWC kit installed, dry joint exhausts installed and has ran fine for the last 10 years. After changing the (weeping from the shaft) GM water pump recently, I noticed the port side exhaust manifold was 50 degrees...
  3. I

    What is the Mercruiser 1998 4.3+ valve train setup procedure for non-adjustable rockers?

    I am re-assembling a mercruiser 1998 4.3+ top end after cylinder head rebuilds. These are the newer style bolt not stud and nut fasteners for the rocker arms. The reason for rebuilding top end was b/c of sticky valve symptoms re: low compression on the 1-3-5 side of the engine. There was plenty...
  4. I

    1998 4.3+ Valve adjustment and distributor install

    I am re-assembling a mercruiser 1998 4.3+ top end after cylinder head rebuilds. The reason for rebuilding top end was b/c of sticky valve symptoms re: low compression on the 1-3-5 side of the engine. There was plenty of rust in the exhaust valve ports that I figured was causing sticky valves and...
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