I have a V135hp Mercury Black Max engine (1992). The problem I have is when the boat is under full throttle or has done - Answered by a verified Marine Mechanic We use cookies to give you the best possible experience on our website.
Mercury Black Max 135 Hp
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Merc 135 - any good? - Moderated Discussion Areas Merc 135 - any good? Author Topic: Merc 135 - any good? Frontier posted 10:56 PM ET (US) Anybody with good or bad experience with a late 1990's 135 HP V6 Mercury (non-Optimax)? Are they holding up? Linust posted 01:34 AM ET (US) I assume you're talking about the classic 2-stroke carbureted 2.0 liter V6 135hp.
I didn't have a late 90s model (not sure how long they made them till) but I had one in the early 90s (1992 model year, bought in 1991). Only reason I don't have it today is I sold the boat to buy my Whaler (it was on my '91 Searay, which I owned until last summer and can still borrow at any time for skiing:). It's a solid performer, lighter than most V6s. Understressed, so if you are inclined, some hot-rod options exist (the 150 2s carb from the early 90s was also a 2 liter V6 motor). Once I learned the operation of the fuel enrichener for starting (press and hold for 5 seconds), it would start up EVERY TIME on the FIRST TURN of the key.
Kgregg posted 08:26 AM ET (US) I've owned a 1991 Merc 135 'Blackmax' outboard since Aug 02 and have had no problems with it. Let me know if you have specific questions on the motor. Kevin frontier posted 04:43 PM ET (US) Thanks for the input. Are the early 1990's 135's the same as the newer one's? Kgregg posted 08:30 AM ET (US) Are the early 1990's 135's the same as the newer one's? When did the 'Blackmax' series stop production and the 'Optimax' motors begin? Linust posted 12:36 PM ET (US) two different technologies.
Blackmax was the brand applied to Merc's outboards way back when.I'm not sure exactly what it means, but I seem to see it only used on the high HP motors-perhaps only on the 2s carb'd V6s. Optimax is Merc's direct-injection 2-stroke technology.
135 Mercury Outboard Specs
Clark Roberts posted 07:06 AM ET (US) Mercury came out with it's V6 engines around 1976 and dubbed them the 'Black Max' engines. They came non-oil injected and in 150, 175, 200 and 225 hp versions and in two displacements, 2.0 Liter for the 150 (steel sleeved) and 2.4 Liter (chrome bore) for the others. These were crank rated for hp and when the industry changed to prop shaft ratings the 150 went to 135hp and 175 to 150hp etc. These first engines evolved into present 2.5L family of V6's including the Optimax DFI versions. Don't have a clue as to origin of the 'Black Max' name!???? SCN linust posted 12:28 PM ET (US) Clark- Downrating the motors.hmmm.IIRC, in 1991/92, the 135 and 150 carb'd motors were both 2 liter blocks. By then, those were prop-shaft ratings.
Mercury 1992 135 Black Max Outboard Manual
I can't confirm right now as I let my Mercury service manuals go with my old boat, but I can check in the next few days. I'll try to get a copy of the spec page from the book-I recall the 175 Ski was a 175 EFI, don't recall if that was the 2 or '2.4' liter block oh yeah.hat '2.4' liter block is a stretch.closer to 2.3 than 2.4 liters! Linust posted 05:36 PM ET (US) got to my buddies this afternoon on another errand, so I grabbed the manual. The Service Manual is (c) 1989, Models V-135 thru V-175, serial nos.
C221500 and up. The 135 and 150 are indeed 2.0 liter blocks (1999 cc) while the XR4 Magnum II 150, 175 and 175 SKI are 2.4 (2327 cc) blocks.
Here's a pdf scan of the general spec page: This doesn't answer any more about the downrating of the engines, though. Hope someone finds this useful!