Hi. I am curious to know some more about the possible long life of a 1.350 HP. Mercury....

Merc say 200 houres before rebuild. From my understanding, an overhead camshaft engine will take high revs alot better than a push rod engine with rocker arms. That means less boost with the same horse power. Turbos = less energy needed to overpressure the engine = less heat. Merc have invested huge money in the development of this engine. And they last longer (thankfully!). 1075s ran usually about 100-180 houres between rebuilds which earned them money. That was cheaper to develop of obvious reasons. 1.350 is a lot of horsepower and one rarely use all of them. If we see the parallell to cars with similar engine set up (Maserati, Audi and Mercedes+++ all have four camshafts, small pistons which push the valves up and down with shims in between, and turbos. There engines usually run 100-200.000 miles without much more than oil changes even when used at German Autobahns. In other words thousands of houres (with thousands of start ups during cold winters too).

Have anyone ran their 1100/1350/1650 untill they REALLY need to be rebuild?? In a normal Powerboat which is used like a fast daycruiser and sometimes for poker runs, the time of having wide open throttle is minimal. Lots of the houres are idling too which can not wear much at all. What goes wrong and how can you feel it? To me, these engines seen to last a very long time (they also have closed cooling which is a big benefit), and I wonder if Mercury on purpouse rebuild them too early just to be sure. How many houres can the run when driven softly?


Thanks for input on this one!


Erik

Have a set of 1100's in a Cigarette 42X - been told non-race hour rebuild is 300 - 400 hours or more (Directly from Top Leadership at Mercury Racing). Best part, they run on 89 octane.

I've owned had many sets of Mercury Racing products the QCV4 engines are a game changer.

Do yourself a favor and ride in a boat with QCV4 power.

I would have loved to had taken a ride in yours Gary, problem is you did ask when you were right here on Lanier, LOL. Hope you are doing well, see you next year.

Hi 39 Unlimited

I just ordered a 42X with 1100's as well
Do you have any updates on your 1100's as far as hours on the engines and have you sent the engines in to rebuild yet and if so, how many hours did you have on them?
Thank you
George

How are the 1100's holding up? max refresh at 400 hrs.? Cost per engine $50k?

Don’t compare car engines to boat engines…it never works out.

all common sense and engineering leaves the room the second the word boat enters.

Found out rebuilds from Mercury Racing are around $75k now. 400 hours is the best case scenario. I was looking at a boat with 1100's with 277 hours. Hard to justify the asking price.

In multiple threads this rebuild cost has been said. Tring to get out of it is not going to happen. Why do you think there are so many beautiful boats that have 250 hours and up on QC4V Mercury's for sale? By the time it is done the cost is $200k and add the time of non use. That is why these boats are being sold. Add that $200k to the asking price of a used boat and it is close to the cost +/- of a new boat. I was from Ohio and a bonehead as well tiring to justify the $$$ then there was the Wife. You want to Play You Got to Pay. Boats are never a good investment from the cash standpoint. That is why I said I would Never own one. So I got several now in different states, new and used, LOL. The value is the Great times you have on them and Memories. It took a long time to realize that. Money in the bank will not get you those things.

Just looking for someone who has had seat time and real world experience with these motors. I got that yesterday, from someone who owns a QC4V. I know a rebuild would be coming very soon. Just wanted to talk with someone who has been through this scenario.

You never make money owning a boat. Its just a matter of how much money you're willing to spend for enjoyment.

Just from and engine standpoint. It is $375-500 an hour that is run out of those QC4Vs to get to a 300-400 hour rebuild on both.

Then add everything else that a boat needs a year to operate. It is $750-800 an hour for a big high performance boat minimum. Add the purchase price and it is astronomically expensive.