Originally Posted by alt
Friend in the local club has just landed with one of these and has a few questions, thought i'd try to assist.
I know little about this block (apart from it's a cousin of the Landcruiser 4.2) / out-drive.
First thing I had him do was replace the gear-oil / clean the gauze on the out-drive.
1) Suspect he has the wrong prop fitted. Came with a SOLAS 3511-143-21 which appears to be 14/3" 21" - it just felt wrong
2) Any idea of WOT RPM on this engine? We got 3400RPM @ 45km/h
3) Oil spitting out the dip-stick and crank (front) seal, but the breather is not blocked. Apparently someone else local to us had similar issues (waiting to hear back from him). Turns out the dip-stick is broken (new one on order). Regarding the crank seal... if it is gone, does anyone know if this engine is a timing belt or chain? (If chain at rear of engine, would make changing crank seal a lot easier)
4) I'm a Volvo KAD person but always showed interest in these engines (Another cousin of the Yanmar?) but my knowledge of the engine / out-drive is very limited... any idea of a source for even general owners manual> (boat came with nothing).
Should make close to 4000rpm lightly loaded & max rated to 3800 with 3600 max continuous rating. Front crank seal isnt hard to do once you get the crank pulley bolt loose 600nm torque iirc & fecking tight with a little corrosion thrown in for good measure. It has a timing belt but its gear driven to the pump & cam drives via toothed belt from the front of the pump. Belt is a doddle to change & destroys the engine if it snaps so cheap insurance if no history.
Gaskets belts filters & seals starter & alternator etc are all landcruiser stuff so easily sourced from local parts shop but easier if you have a landcruiser registration no handy. I can give you a landcruiser reg to use its a 24v version so on your 12v engine the timing belt will be different, you need a reg from an early hdj80 to get the correct belt almost everything else is the same as my hdj100 series