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    115 Pro XS Command Thrust on a pontoon - prop?

    Will try and make this as TLDR friendly as possible. Both props tested same day, same conditions, same load. RPM confirmed via VesselView and speed via GPS. Would like to be able to hit max RPM(6300) or just above with this load as it is about as light as we're ever going to be. Also confused by...
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    Clogged fuel tank vent cause engine to start and die?

    2018 Mercury 115 Pro XS CT 4 Stroke 2018 pontoon boat with Moeller fuel tank in engine pod. Fuel tank has a raised fill neck with a vent hose attached about 2" down from the fill cap. No primer bulb or FDV, fuel supply hose goes direct to the motor. A few weeks ago it developed a problem where...
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    115 Pro XS CT 4 stroke losing RPM and speed

    2017 model, serial #2B501681, bought a couple of months ago on a 22' pontoon boat with lifting strakes and under skinning. 4 key time spans, each consisting of a few times out on it. 1st time out - Wouldn't rev past about 2500. Diagnosed/as a bad shift position sensor, problem solved. Also...
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    UFlex - HYCO vs HYTECH vs PROTECH?

    Want to upgrade my mechanical steering to hydraulic. Price difference between the Hyco and Protech are similar enough, about a $60-70 dollar difference. Engine is 115 ProXS CT. Boat is a 22' pontoon. Aside from the 150 and 300 HP limits between the 2 systems, would one provide any benefit over...
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    115 Pro XS 4 stroke, is it a CT?

    2017/18 115 Pro XS 4 stroke, serial #2B501861. It has a sticker on the lower that says 2.38:1, which would indicate that it is a Command Thrust lower. However, just about every other CT Pro XS I've seen in person and in photos has a silver lower, while this one is black and it doesn't appear...
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    Mercury Pro XS to MercMonitor Level 1 to Lowrance?

    4 stroke 115 Pro XS CT Level 1 MercMonitor gauge which is also a gateway and the wiring harness for it has an NMEA2000 connector New Lowrance Elite FS 7 I keep being told and reading that I need an NMEA2K network between the MercMonitor and Lowrance - Why is that? Why can't I plug the...
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    Yet another prop question thread

    2018 Mercury 115 Pro XS 4 stroke. 2018 22' pontoon. 14.5" x 17P Solas Rubex 4 blade aluminum prop. WOT top speed with 2 adults, light gear and 3/4 tank of fuel was 26 MPH at 5800 RPM. Should be able to rev it to 6300. What prop should I go with to maximize RPM and gain top end?
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    Shift Position sensor - 2018 115 Pro XS 4S

    I need one and the Mercury online parts catalog says it's part # 8M0181784. When I google it I get only 1 search result from a place called PPT(Performance Product Technologies), like that's the only place online that mentions that part number. Seems a bit odd and I'm almost wondering if it's...
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    Install tachometer on 2018 Merc 115 Pro XS 4S

    Anyone know if these motors come prewired for a tach? Just bought a boat and it didn't come with one. I'd like to install an analog tach, but I'm unsure if the wiring harness going to the helm includes the signal wire for it. I'd look under the dash myself, but it's a couple of hours away and...
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    VesselView - Questions from a total noob

    Just bought a pontoon with a 2018 115HP Merc Pro XS 4 Stroke. Looking to add a GPS/Chartplotter with VesselView functionality. Not even sure if what I'm looking for exists, I'd like at least a 7" that can overlay engine data over the GPS/Chartplotting screens. We hardly ever fish so all of...
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    2018 115 Pro XS - OIL, the great debate, and what fuel?

    Just bought this 4 stroke last night and want to change the oil and filter before I take it out. I know this is a topic that gets discussed a lot...but I'll ask it anyway, what oil? 10W30 or 25W40? Synthetic or dino? It'll never be used in temps below about 50 and higher than about 100...
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    2016 Mercury Optimax 150 Pro XS Reviews?

    Considering a tritoon with one of these on it and it just occurred to me that this is a 2 stroke motor. I don't have any past experience with 2 strokes and, in all honesty, extremely little experience with outboards in general. All of my previous boats have been fiberglass stern drives...
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    3.0 seems low on power and dieseling at shut off

    Had no issues last season when it was put away. Winterized and added fuel stabilizer to a tank just below half full(about 12 gallons in a 26 gallon tank). 4 weeks ago it was de-winterized, fuel/water separator replaced and tank filled with non-ethanol gas. I don't recall if it was 89 or 91...
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    Washing interior with boat in slip/water?

    Hey, all. I've been trailering my boat to/from the local lakes which meant I could wash it at home while it was on the trailer and let the water drain out of the bilge drain. This year we decided to splurge and rented a slip at a local marina. One thing I wasn't expecting is how quickly and...
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    Transducer cable through transom?

    Hey, all. I'm looking for a good, water tight, way to accomplish this without just drilling a hole and applying gobs-o-sealant to it. It's on a FG bow rider and will be above the water line, but only by about 3-4" above it, so it'll get very wet, very often. I ordered the BSS Side Entry...
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    BSS Add-A-Battery ACR and wiring questions

    Hey, all. I'll be adding a BSS 7650 kit which is comprised of their 5511E switch and 7610 SI-ACR. There are several ways to wire this up, and the most common is to connect the alternator output to the starting battery side...however, there are instances where this is not ideal and my questions...
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    Dual Voltage Gauge - 52mm

    Does anyone know of one? Seems impossible to find other than in Australia. I'm looking for a dual input gauge to fit in a standard 52mm(2") gauge cut out that can display the voltage of 2 independent 12v batteries. Preferably with a white background and chrome bezel to match the rest of my...
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    What controls the TKS module on a Merc 3.0?

    This is an '06. No issues with cold starts, and most times no issues with a hot start. It's the in-between engine temps that seem off. When warm, it will start after a couple of seconds of cranking and then have a very shaky idle for a few minutes, eventually smoothing out. Idle RPM also is...
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    2006 3.0 TKS Warm Start Issue

    It starts relatively well when cold. No throttle pumps, 2-3 seconds of cranking and it'll fire up. It's a little rough at idle at first, but the increased cold start idle helps it stay running until things warm up and everything smoothes out. Can put it in gear right away to back it off of...
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    Humminbird Helix 5 losing depth reading at slow speed and when stopped

    Just installed this with a transom mounted transducer. It's rock solid at anything above 10-15mph, but any slower than that, including when not in motion, it looses depth readings randomly. I find this odd as it's usually the other way around. I have the transducer mounted next to the...
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