Mar 8, 2010 - 'Just recently bought a boat with a Mercury BlackMax 150 and I have a. Online access to repair manuals for your Mercury / Mariner outboard. Numerous Mercury Marine Outboard How-To Technical Repair Videos.Search Videos. 'It must be awfully nice to be a writer and be privileged to point to. ![]() Your dealer at your initial walk through will go over the break in procedure in detail. You should follow their procedures exactly. The 4 stroke outboards run extremely cool. When you break in the rings, it's important that you not be shy on throwing the throttle to it when it's time. The piston rings need some heat to get them to break in properly. Just make sure you warm up your engine for awhile when you start your motor--until your break in period is through. You'll really enjoy that motor. Although I've got the F150 Yamaha, as far as I can tell the Merc. Engine is about equal in every performance category. As they're a detuned 300 hp motor, 150 FourStokes are proving to be very reliable. I look for higher horsepower versions of that motor in the future. Engine Break‑in Procedure IMPORTANT: Failure to follow the engine break‑in procedures can result in poor performance throughout the life of the engine and can cause engine damage. Always follow break‑in procedures. For the first two hours of operation, run the engine at varied throttle settings up to 4500 RPM or at three‑quarter throttle, and at full throttle for approximately one minute every ten minutes. For the next eight hours of operation, avoid continuous operation at full throttle for more than five minutes at a time. Engine Break‑in Procedure IMPORTANT: Failure to follow the engine break‑in procedures can result in poor performance throughout the life of the engine and can cause engine damage. Always follow break‑in procedures. Owners Manual For Mercury 150 Hp OutboardFor the first two hours of operation, run the engine at varied throttle settings up to 4500 RPM or at three‑quarter throttle, and at full throttle for approximately one minute every ten minutes. For the next eight hours of operation, avoid continuous operation at full throttle for more than five minutes at a timesame for my 115 4s. The most important thing with these four strokes is have them under a load at all times for the first couple hours. I don't know if the 150 4S has oil temp on the smartcraft, but you have to get those oil temps over 200* to really get the motor broken in right. On four strokes oil temp is as important as water temp. I live in the great white north and fish mostly on lakes less than 1k acres. ![]() Mercury Outboard Owners Manual PdfA proper break in will limit that issue so you do not get crazy oil dilution. I hate to start back up a thread that is almost a year old but i could not find the answer searching the forums. Mercury 150 Outboard Owners ManualMy follow up question about this Merc 150 break in is: If i am going to be running for 2 hours at 3/4 throttle or full throttle, my 30 gallon tank on my new SPX is going to run out of gas. 'IF' i have to stop and fill up on the ICW during my initial break-in is that going to cause any harm while i idle into the marina's and get fuel? I do not have a spot on the ICW where i can do 35mph+ for more than 20 minutes before i am going to hit a no wake zone.
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