Antifreeze low after sitting 2 week

[karayj]

So I went to winterize my boat and I noticed as in the past the antifreeze was a little low and this has been a summertime issue after replacing the head gasket exhaust gasket the intake gasket and exhaust riser gasket . Every time I start up the boat you can clearly see the antifreeze shooting out of the exhaust it lasts for about 10 seconds and it's pretty much the same amount that's missing 1 pint . So somehow any phrase is leaking I guess into the exhaust add when you start the boat shoots out the back . Do you think it’s the exhaust riser gasket (new) failed . I may redo the riser and exhaust gasket next spring

 

[karayj]

I 'm thinking the riser gasket failed.... and is leaking into the exhaust . What is the proper way to replace it without letting antifreeze leak into the pistons.

 

[tpenfield]

What engine are we talking about ? Got a S/N ?

I assume 'Full' closed cooling . . .

 

[karayj]

89 merc 3.7 Also I notice there are allot of different gaskets for the riser...

 

[karayj]

Can some one tell me what gasket I should buy. I have a feeling I have the wrong one on the engine now.

 

[karayj]

Serial numbers are below the picture of the gasket I installed and
and the riser pictures are the old gasket from what I remember.

 

[nola mike]

27-18272 is the gasket, use the Merc graphite gasket, not the green paper. Drain the system and pressure test. Did you check the heat exchanger?

 

[karayj]

OH I forgot the exchange my have a leak... I did a pressure test I did drop I did hear a noise near the exhaust manifold / riser. Were would I look on the exchange?

 

[nola mike]

I'd disconnect the hx and pressurize the coolant side

 

[karayj]

I already winterized it so I will have to do this in the spring UGH/ I have a marina here that the owner said I can help my self to used Heater Exchanges

 

[nola mike]

I already winterized it so I will have to do this in the spring UGH/ I have a marina here that the owner said I can help my self to used Heater Exchanges

Winterizing involves pulling the aft plug on the hx...1 minute if you're missing 3 fingers