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Old 01-03-2015, 11:05 AM   #5
sunchaser
Guru
 
City: Carefree, Arizona
Vessel Name: sunchaser V
Vessel Model: DeFever 48 (sold)
Join Date: Apr 2008
Posts: 10,185
Forget about brand when looking at 4 strokes. As you stated, think PO's care and diligence. Here are a few engine things to look for
  • Are spare parts readily available such as coolant and RW pumps, HXs, turbos, transmissions and fuel system pieces.
  • Timing for RW pump impeller, fuel filters and oil change outs.
  • Decent records
  • Spotless is good, clean bilges and no rust on water or fuel tanks tops.
  • Is the boat propped right
Once you have gotten through the PO's attentiveness then start flipping coins between JD, Lehman, Perkins, Cummins, Cat or Lugger for those below say 350HP. When going above 350 HP the things to look our for get very engine specific because within brands there are some goods and bads and MTU and MAN enter the mix.

Boatdiesel is your engine website friend, pay the $25 and do some real searching.
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