Joined Oct 22, 2005. 2,806 Posts. #4 · May 20, 2013. at tick over and cold you are looking at least 50 -60 psi and 25 psi hot and around 50 -60 psi at max revs any thing less then you have problems and as stated hope the shells were the right size, but could just be a sender fault as the engine has been to bits, or could be a pressure relieve. I have a 2003 Mercury 60 hp four stroke EFI. Start ups good at first. goes up to about 3100 rpm in gear, has a horn go off then has in intermittent cutting out. Back off throttle to 1500 rpm. Primer b read more. Mercury 60 hp FourStroke EFI BigFoot decal set replica in Red for 2002-2004 (4-Stroke) Outboards. Referenced Part number: 883526A02 DECAL SET 859267-7 DECAL, Bigfoot 859270-15 DECAL, FourStroke EFI. Qty: Add to Cart Buy with. OR. ... Mercury 60 hp 883526A02 Decal Set will work on the following Models:.