Engine compartment ventilation

[shawmacs]

Hi all, 

I have taken over ownership of a 1990 34+ from my father in law and we have sold our previous J/30 which I had for 16 years and knew inside and out. I am sure I will have lots and lots of questions while I learn this new vessel. It is definitely the perfect upgrade for us. 

The biggest downside I see is this tiny engine compartment. Cramped maintenance maneuvers aside, it doesn't seem to have clear ventilation to keep the temps down. Has anyone come up with a means to improve airflow? I am thinking if I upgrade the batteries and start putting more load on an upgraded alternator, the ambient temperatures may affect charging performance. 

Of the top of my head, maybe some sort of forced air duct back under the fuel tank following the exhaust outlet to the aft lazarettes.

Thanks!

Scott

S/V Pacific High. 1990 34+ 

Squamish BC

[Francois Rivard]

Hi, 

Positively zero issues with engine temps even in 90+ degrees outside temps. It's a tiny 900 cc diesel that wheezes out 24 hp... no sweat, C&C/ Yanmar engineers knew what they were doing.

- Francois

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[Chuck Scheaffer]

I agree with Francois.  I have the Universal M4-30 diesel and it used to overheat when pushed hard for hours during deliveries.  I added vents to the transom and learned they didn't help.  More recently, I descaled the heat exchanger using Rydlyme, and the engine temperature now stays between 160 and 180.    The engine itself stays below 200, as it is cooled by the water flowing through it.   The exhaust temperature is probably a lot higher, but air won't cool it like water.  I'd watch your engine temperature gage and if it gets higher than 185 or 190, run a descaler through it to clean the metal surfaces.

Chuck S  

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