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Silver thing is thermostat housing no? Brown thing I think your talking about is end of heat exchanger. Gas tank is kicker tank nothing to do with big motor.

Appreciate all the help on here. Have more pics and can explain what I’ve done. As mentioned lower unit down and it drained and it’s still down. Removed back plug on heat exchanger clear water ran out. Also plug at bottom of exhaust elbow nothing came out. Plug still off. Can see the blue...

120 hp Mercruiser 1973. At the end of the heat exchanger closest to the stern there were two plugs. I removed the back one and fresh water came out. I’m assuming that drained the heat exchanger. So check to be sure about power steering and that should do it. Thanks in advance

120 hp Mercruiser 1973. At the end of the heat exchanger closest to the stern there were two plugs. I removed the back one and fresh water came out. I’m assuming that drained the heat exchanger. So check to be sure about power steering and that should do it. Thanks in advance

Have never drained this for winter. Outdrive down it's empty. Closed cooling system so where all do I drain fresh water out of. Arrows on the pic for location would be great. Thanks

Excellent idea 1960 Starlite thanks for that.

A.I. is telling me exterior trim tilt switch might have been replaced with a jobber interior limit switch. Will check for that when I get in the boat.

So drive has to come off to access?

Changing my starter noticed a wire with insulation rotting off on my 1966 120 hp Mercruiser with a 1974-1976 alpha outdrive. The wire is one of two going through the transom directly behind the Center of the engine and goes into the outdrive. I’m assuming they are for the trim tilt switch...

But will ask anyways. These trim tabs didn't have hose clamps where the hose attaches to the cylinder. I'd my leak there as simple a fix as put a hose clamp on?

This trim tabs leaking oil? Looks like out of fitting and hose. Is it as simple as hose clamp, and if so why are they not on it already?

All good bad connection to bilge pump.

When I hook the battery power cable up I'm getting this noise? Trim tilt pump running maybe?

Thank you matt167. Been awhile since I seen u on here Bondo I have great respect for your opinions. Thank you.

I have a complete 120hp mercruiser setup prop to front engine pulley installed in a boat now. Have a chance for a better boat with a blown 470. If I completely strip the 470 down to the bare transom will there be any issues besides front motor mounts? Or is there more potential problems? I...

All good got into it this morning. Outdrive is in the shop. Engine next.

I have a 240 OMC and drive see pics got the outdrive ready to pull off but the shift cable is still attached at the top of the back of the engine. See that pic circled area. Question is how does it come off. First what gear should it be in? I lifted the pin and swung out the two arms behind...

Thank you StewartL will have a look. If I cant find one should be ok to run one to a negative post on a battery?

On the transom of my boat was this connector with a purple and white wire on it but needed new connection ends. When changing see there was a third wire but broke off only the connection end was still on the post. So a purple and white wire going from this transom connection point to the front...