88 Four Winns , 4.3 Chevy , Cobra outdrive , low hours.
Sorry, this will be long read but didn't want to miss anything that might be important.
Thanks in advance!
Bought boat without upper half of outdrive. Previous owner changed fluid, filled from top, locked it up.
Bought used upper half and...
1988 FourWinns with 4.3 Chevy mated to a Cobra outdrive.
New thermostat and impeller. Runs nice and cool (stays at 160 on muffs) but heats up under a load.
On the lake it quickly got up over 200 so I dropped back to neutral/idle. Thought it would cool back down quickly but it stayed hot. It did...
got my blocked cooling passage on my cobra outdrive gearcase issue solved (88 fourwinns, 4.3 v-6).
ran on muffs/hose for a half hour in driveway and it stayed at 160 degrees. took it to the lake...
after a short while it got up to 200+ degrees.
decided to let it idle for a while to watch it cool...
88 4.3 chevy OMC Cobra outdrive.
Getting hot.
Had outdrive off for several weeks as last owner locked up the upper half solid being low on gear lube.
Installed used outdrive, impeller, fluid, etc. Fired right up with muffs on.
Got hot quickly, exhaust manifolds quite hot. Thought stuck...
