Hey John have you considered installing a bilge blower? I run same motor as you, on a three stage. I installed one during build initially for safety (get rid of any fuel vapour if around) but I think helps with drawing hot air out(great for warming trigger finger beside outlet in winter when reached destination ;-). I have inlet pipe for mine down low at back of sump, draws air past sump from up front via under floor. I don't have oil temp gauge but.