I've just finished swapping out the power head from a 1969 55 HP Chrysler into a newer Force 50 HP lower unit. There was something wrong with the Chrysler's lower unit (wouldn't go in reverse) and the Force had a perfect prop and hydraulic tilt&trim. It was relatively easy to do, but I'm left with just a couple of concerns:<br /><br />1. There was a small black rubber hose the comes off two points on the intake side of the Chrysler block near where the carb bolts on, and it used to plug into a port on the base of the compartment (top of the Chrysler's lower unit) on the same side as the starter solenoid. I'm not sure what these were for (I suspect vacuum) but there is no such a port on the lower unit of the Force, just a casting relief where it could have been drilled through. I've just plugged the hose for now, but I'm not sure what it's for or how critical it is to the proper operation of the Chrysler engine.<br /><br />2. I've been trying to tell where the cooling water comes out of the Force's lower unit. I'm running the engine on land using a set of water ear muffs. I'm worried that the water pump may not be working, or if it is, the flow has been interrupted. How can I tell if the engine is being cooled.<br /><br />The engine is mounted on a 1969 Chrysler Challenger 118 boat.<br /><br />I can get the serial numbers of both engines, but don't have them handy right now.<br /><br />Appreciate any insight you might have to share. My worst fear is that the combination of the original Chrysler power heat with the new Force lower unit, may not be getting the cooling water the engine needs.<br /><br />Cheers,<br /><br />Pat from Whitby.
