I have a 40hp mariner outboard serial is 40E 676BL 411226, I need the year to try find a service manual for it. The motor has great compression and starts at the flick of the key, gets my 12 foot pride playmate up to 25 knots with ease and runs smooth, it just has no low down grunt, if you go flat stick off the mark it just labors and misses but if you take off gradually and steady it has no trouble at all. So i need a manual to find and fix the prob thanx if u can help.