Heater connections on engine for a 2001 Xstar

[TURSTY]

Hey all,

I am building a DIY heater for my 2001 Xstar with the 5.7l injected Indmar 330hp motor.

Can anyone point me in the right direction on where to find the heater water feed and return on the motor?

Pics would be ideal as I think I have found a couple of possible bungs on the port side of the motor near the back, but not sure which it correct.

[wheelerd]

Check out this thread. http://www.mastercraft.com/teamtalk/...ad.php?t=20018
It has some good pics and info. It shows an MCX but the hookups are the same for your engine.

[TURSTY]

Thanks for the link. I have had a look over my motor and it looks slightly different. The fuel rails on my engine seem to be joined at the back and the joiner hoses run straight over the heater outlet by the looks. Has anyone got around this issue before? Im not sure any kind of fitting would clear the lines, even a 90* bend =S.

[bigmac]

Yah, that's tight quarters. All you need is a hose barb for a 5/8 line. On the MCX, there's a 45 degree angled brass fitting and a valve. That is the place where you want your supply line.

The return line is a similar plug on your engine's circulating pump. Depending on the boat, might be kind of hard to get to. IMHO, using a Y-pipe for the return line is easier to deal with and additionally is more effective in that it creates far better heat output at idle or low RPM.

[willg]

I have a 2002 xstar w/ factory heater. The connection is in a different place. I'll go take some pictures now.

[wheelerd]

Here are two pics from my former 01 X5. The supply line is just above the water pump pulley. I just unscrewed the plug that was in the manifold and screwed in the 90 degree brass fitting. At the bottom of the second pic you can just barely see the Y of the return as it enters the raw water intake hose.

[willg]

On my boat, 2002 X-star (5.7L LTR engine) w/ factory heater, the valve is on the side of the block, between the spark plugs and under the manifold. It was really hard to get a good picture with the dividers in, I'll try to take a better one tomorrow. In the second picture, you can see the brass valve right in the center of the image between the exhaust. I have no idea where the water returns to the engine.