Leak in he engine compartment

My 1986 IP 27 is located on Puget Sound.  When it rains (often here) water runs down the port side of the engine compartment, down the front of the battery box and on the side of the engine, some times filling the engine pan in the winter.  I have decked the drains and they are all clear.  I cannot detect how the water is entering.  Can anyone help?
Graham

Graham:
I would expect that would be a failed engine lid hatch gasket. I would inspect this and replace that as I had to do that on our 1986 IP27 #058.

Hayden

Thanks! I will try that.
Graham

Hayden,
Thanks. I removed the old gasket and replaced it with a new one. It is still dry here so I am unsure if it will succeed. May I ask you one further question, please. The gasket I replaced is not on the hatch lid, but on the raised edge of opening. Should there also be a gasket on the edge of the hatch? I worry that adding a gasket there would impede the gutters and not allow water to properly channel into the drains.

Graham
The engine hatch lid has a rubber liner and that presses down and makes a seal of its own. I do not think you need one on the hatch lid. If anything, maybe a thicker one on the raised lip.
PS:
Also make sure the drain hoses and scuppers for the drain around the hatch lid are open and not blocked. If these are blocked then the water will back up and no gasket will stop a leak. Check the drains too.
Hayden.

Hayden,
Over the weekend I placed a hose into the drains at the hatch lid and in the small locker on the port side. They all drained overboard as they should. I replaced the gasket around the mouth of the engine compartment. Today I ran a hose into the cockpit and simulated rain for about 25 minutes. The hose nozzle I placed at the transom. There were no engine compartment leaks. I have not added a gasket to the lid because I worry it might block the drains, both of which are located close the hatch lid. What do you think? (I much appreciate your advice with this issue).
Graham