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02.06.2021 3:17:28
The new Mercury 115 features new graphics over a classic black Mercury cowl with a shapely profile. here
See full version: Mercury Debuts All-New 75 HP, 90 HP, and 115 HP FourStroke Outboards
The new Mercury 115 features new graphics over a classic black Mercury cowl with a shapely profile. here
The 75 HP, 90 HP and 115 HP FourStroke models are in production and being shipped to dealers and boat builders. Pricing (MSRP) ranges from $9,235 for the 75 FourStroke (offered only with a 20-inch shaft) to $10,975 for the 115 Command Thrust model. The Command Thrust gearcase adds $330 to the price of any 90 or 115 HP model. All 2.1-liter models are available with the optional Big Tiller control, and there are 65 and 80 HP jet-drive versions as well.
The new Mercury 115 FourStroke is smaller, lighter, more powerful and perhaps more versatile than any motor in this key segment of the outboard market, and it was introduced at an event in Wisconsin lately that also noted the 75th anniversary of the founding of Kiekhaefer Mercury in the state. The new 2.1-liter, four-cylinder outboard will also be offered with a 75- and 90-hp ratings.
These 2.1-liter series outboards are lightweight, compact, powerful, thrifty and quiet. Plus, a choice of gearcases offer greater flexibility for matching performance to hull type.
The new Mercury 75 HP, 90 HP, and 115 HP FourStroke models will power all kinds of boats, from bass rigs to pontoons, flats skiffs to dual-rig center consoles, in a segment that covers 30 percent of the outboard market.
RPM Information: 5000-5500
Your engine's RPM range is important in choosing the right propeller for a given application. For example, if you look at your tachometer at top speed and it is not within the engine's RPM range then that is generally not good. You want your RPM's to be within the proper range while at wide open throttle (WOT). Be sure to do your testing under your normal boating conditions and with a good propeller (not bent, cracked, or excessively chipped).
The iboats Outboard Motor Forums are another excellent source of information. here
Mercury’s world-renowned engineering team has packed incredible power into these lighter, compact four-cylinder single-overhead-cam engines. The 115hp weighs 20 pounds less than its closest four-stroke competitor, making it the world’s lightest low-emissions outboard in its power range.
Take a deeper dive into what makes Mercury outboards stand apart with detailed information on each motor and the features that make them unique. here
The Mercury 115 FourStroke is quieter than a competitive 115hp four-stroke across the rpm band. more
There is certainly a difference in the initial cost of a carburetted 2-stroke compared to a 4-stroke, with prices for the nine 90hp engines we reviewed varying from $NZ7995 for a 2-stroke Parsun T90, through to $NZ20,789 for the new V4, direct injected 2-stroke Evinrude ETEC 90 HO.
We took one boat to two different locations and spent a whole lot of time to put together a comprehensive fuel and performance data comparison on nine different 90hp outboards. The results proved both interesting and predictable.
If you have an issue with weight on the transom, then you might be better off looking at the basic 2-stroke options as the 3-cyl, carburetted versions are considerably lighter –121-137kg – than the 4-cyl. 4-strokes – 155-181kg.
Direct injection has become an important option to further optimise 2-stroke internal combustion engines. The opportunity to dramatically reduce the hydrocarbon emissions makes this system even more attractive. Whatever the brand name, they are all essentially doing the same job, but in a different way. here
Fuel was drawn from a 25-litre tote tank and most engines were evaluated over a period of 30 minutes, with various runs depending on the tide. All tests were performed several times to ensure accuracy and repeatability.
In contrast, in a two-stroke the combustion of the fuel-air mixture takes place every stroke that the piston travels towards the crankshaft, from the top dead centre (TDC) to the bottom dead centre (BDC); this is called a power stroke. Thus, every two strokes is a power stroke – hence the name 2-stroke. When the piston approaches the BDC position, ports that were originally blocked by the piston, unblock to allow the burned gases to flow out of the exhaust ports and a fresh charge of air-fuel mixture to flow in through the intake (transfer) ports from the crankcase in a process called scavenging. here
B. Is there a lighter alternative in a 75-90HP outboard out there?
I bought 16' Fisherman by Sportcraft.a couple years ago and I have clean it up quite a bit. Perfect little bay boat for our family. Came with a 1991 3 cyl 75HP 2 stroke Mercury on it. It runs pretty well considering its age but since I bought it I couldn't get over how physically large is seems to be compared to some of the other outboards I have seen. in some cases larger that some 90's and 115's I have seen.
A. How much does the outboard I have weigh?
So I have been trying to do some research on: here
Adding to this has been the fact that it seems to really weigh down on the stern of the boat. If anyone stands toward the back of the boat, water comes in through the scuppers. I installed ball check scuppers this year but the don't seem to work all that well (that's another issue).
I saw some that came in around 200-230lbs and I "think" my motor is over 300 lbs. here