CONTINUOUSWAVE

msteinkampf

Q3: what type of wood was used as the seat base of the Reversible Pilot Seat? It looked like ordinary plywood. I suspect it was discolored due to age and contact with the overlying foam rubber, but I can’t rule out that it was treated with something before installation. Q4: is [the method of attach...

msteinkampf

I was interested in this discussion because I recently replaced my outboard motor of thirty-five years whose prop nut was secured with a tab washer with one (a Yamaha F70) that uses a cotter pin. When I installed the propeller on the new engine, I simply inserted the pin and bent back the tangs as s...

msteinkampf

Mark, thanks for the suggestion. Despite considerable upward pressure on the seat, I couldn't get the T-nuts to bite. Under these circumstances, I thought the best way to remove the seat would be to pull the upholstery staples and remove the cushion so that the T-nuts could be grabbed with locking p...

msteinkampf

Q1: how can screw fasteners that hold the plywood seat base of a Reversible Pilot Seat to the top of the Z-legs be removed when the wood has rotted and the T-nut fasteners in the plywood just spin? seatBaseToLegFasteners.jpg BACKSTORY The reversible pilot seat on my 1990 Montauk 17 is sagging enough...

msteinkampf

A few months ago I installed a Garmin ECHOMAP UHD2 93sv connected to the engine via an NMEA 2000 network (you can read the details of how I accomplished this here: https://continuouswave.com/forum/viewtopic.php?f=9&t=10083). This allowed me to assess fuel efficiency, as shown in this graph: F70 ...

msteinkampf

Flush-mount radios do look nice when they are installed, but when the inevitable time comes to replace or upgrade the unit, that hole in the console can be problematic. The fixed-mount VHF radio on my 1990 Montauk 17 is mounted on a bracket just inside the center console, where it is protected from ...

msteinkampf

A final note about connecting a Garmin ECHOMAP UHD2 93sv to a Yamaha F70 outboard motor: The setup for the Garmin unit includes designating the number of engines, and I initially chose “1”. When I ran the boat, the fuel economy readout was blank, but when I reset the number of engines to “Auto Confi...

msteinkampf

Those look like well-crafted modifications, but I'm not surprised the owner's daughters didn't like the boat. A Montauk has limited freeboard (hence the popularity of railings) and deck space, and these changes reduced both. Rather than adding auxiliary fuel tanks, a more sensible upgrade would have...

msteinkampf

The X2Power looks like a very nice battery, but at about $400 is kind of pricey. That 48 month "free replacement warranty" looks attractive, though. However, the fine print on the X2Power battery includes the following: If you store or do not use your vehicle or battery for a period in exc...

msteinkampf

Please submit a photo.

M

msteinkampf

I think moving the fuel tank under the reversible pilot seat is a good idea, as it would give you more options for passenger seating. If you want to distribute weight towards the bow, consider moving the batteries to the console.

M

msteinkampf

My 1990 Montauk 17 came with only one battery. When I installed a trolling motor, I added a second battery identical to the first one, using a combination starting anddeep cycle AGM battery. https://www.samsclub.com/ip/duracell-agm-deep-cycle-marine-and-rv-battery-group-size-sl34magm/8399630002 Now ...

msteinkampf

A few additional points: - My Garmin unit displays a datum accompanied by the symbol for “boost pressure”, the additional pressure supplied by a turbocharger or supercharger to the air intake manifold. In a normally aspirated engine like the F70, this is the absolute pressure at the air intake manif...

msteinkampf

One concern not addressed in this discussion about a helm-mounted multifunction display is the compass-safe distance, which is the minimum gap needed between a magnetic compass and an electronic device on a ship or vehicle to prevent interference, ensuring the compass points accurately to magnetic n...

msteinkampf

After connecting and initializing the Garmin Echomap, I powered up the NMEA 2000 backbone and turned the engine's ignition switch only to be greeted with a loud beeping and an error code displayed on the MFD. Garmin Echomap initial picture.jpg Actually, there were four alarms activated, as seen here...

msteinkampf

Option 6. Displaying Yamaha NMEA 2000 data on a Garmin ECHOMAP without using a gateway As noted above, Garmin indicates that their MFDs can receive NMEA 2000 data from “some” Yamaha engines without using a Yamaha Multi Hub or a Yamaha Gateway. Information supplied by Navico for their Lowrance MFDs s...

msteinkampf

Although I never met him, it was apparent from his postings that he was a smart, innovative gentleman. My hydraulic jack plate installation came directly from a post of his, and I always looked forward to his online contributions.

He will be missed.

M

msteinkampf

Option 4. “Advanced Yamaha® Support with J1939 Integration”. Many Garmin GPSMAP chartplotters have a J1939 network port. This port allows the unit to receive J1939 sentences, some of which are comparable to NMEA 2000 data, from Yamaha engines using cables to connect a Yamaha Multi Hub directly to th...

msteinkampf

Option 3. Accessing Yamaha NMEA 2000 data via the CL7 display The Yamaha CL7 MFD was manufactured by Garmin and is similar to their GPSMAP 7607 unit, but the CL7 has a built-in Yamaha gateway and can output NMEA 2000 data to a generic NMEA 2000 bus. The CL7 connects to the engine via a Command Link ...

msteinkampf

Option 2. NMEA 2000 using Yamaha gateway without the Multi Hub For installations that don’t require a Multi Hub, Yamaha provides cables and adapters for connecting the gateway directly to the engine, as shown in the diagram below (downloaded from https://static.perfprotech.com/files/store/app_themes...

msteinkampf

The options for connecting a Yamaha outboard to a multifunction display (MFD) depend on what Yamaha engine(s) you have and which MFD you want it to connect to. I’m going to primarily discuss how to connect a Yamaha F70 engine to a Garmin ECHOMAP UHD2 93sv Fish Finder/Chartplotter Combo with GT54 Tra...

msteinkampf

JimH wrote: "I can't offer any advice regarding a Yamaha engine and connecting it to a NMEA-2000 network. There seems to be some peculiarities associated with where you connect to the engine data depending on what type of Yamaha-brand instrumentation you already have. If you solve that puzzle ...

msteinkampf

jimh wrote:The metal tag HIN seen in Figure 15 has me wondering if my recollection of the HIN on my 1990 REVENGE 22 was actually molded in or if it were a tag.

I found a photo of your boat here. It looks like you have a metal HIN tag.

--M

msteinkampf

The Yamaha F70 owner’s manual recommends that if the engine cannot be trailered in the normal running position, an additional support device should be used to secure it in the tilt position. I didn’t have any support device, so last month I just tilted the engine up and headed out on the highway. Du...

msteinkampf

When I hooked up the trailer to take the boat out for a spin in the lake before heading for my annual Louisiana fishing trip, I noticed that the tongue weight was much heavier than before the repower. I have an EZ Loader adjustable trailer, and a few years ago I had adjusted it so that the transom i...

msteinkampf

SOLD: 1991 Mercury 90-HP outboard engine, tools, and accessories for $1,200 in Mountain Brook, Alabama 35223. It sold for the asking price via Facebook Marketplace within four hours of posting, and I had at least one other buyer lined up. The motor stand went for an extra $50. It seems there are qui...

msteinkampf

David--thanks for your interest in this project. You can find much more detail about this jack plate on my Montauk 17, including the answers to your questions, by reading at: Atlas Micro Jacker hydraulic jack plate on a Montauk 17 https://continuouswave.com/forum/viewtopic.php?f=6&t=7564&p=4...

msteinkampf

PART FIVE: SEA TRIAL ⋅ June 6, 2025; Lewis Smith Lake, Alabama; elevation 510 feet; air temperature 79-degrees-F; ⋅ boat speeds measured by GPS (Humminbird Helix 5); engine speed measured by Quicksilver analog tachometer (not calibrated); aAll values listed are the mean of two ru...

msteinkampf

PART FOUR: ENGINE BREAK-IN When I took delivery of the boat, I received two sets of break-in instructions. Here is the one in the owner’s manual: F70 factory break-in procedure.jpg And here is what I received from the dealer: F70 dealer break-in procedure.jpg Note that the manufacturer recommends av...

msteinkampf

This is as close as I could come to fulfilling jimh's request for an experimental measurement. BW transom.jpg A tape perpendicular to the water was attached to the transom and marked off in inches. The distance from the transom to the water level was initially measured with no added weights. Weights...

msteinkampf

After years of struggling with fuel hoses obtained at the local sporting goods store, I purchased a Quicksilver 8M0061890 Fuel Line Assembly - 9 Ft. Long with Primer Bulb . Pricey, but money well spent, as the liner doesn’t separate from the rubber when a fitting is inserted, unlike the aftermarket ...

msteinkampf

PART THREE: FUEL SYSTEM Before putting the boat in the water, I had to reinstall the fuel system. Fortunately, the fuel connector for my Mercury outboard fits the Yamaha, but the Yamaha owner’s manual recommends installing an external 10-micron fuel filter despite there being a 10-micron filter unde...

msteinkampf

Another note about propellers. I expect that one day the supply of Yamaha Performance 3 propellers will dry up. As previously mentioned, I think the Turbo Quest 3 blade 13.125-inch x 15-pitch is probably the best alternative for a Yamaha F70 on a Montauk 17, although I don’t doubt that other props m...

msteinkampf

Perhaps I am confused, but in PHIL T's remarks he mentions the "13.25 x 14 Yamaha Performance Series" propeller as a recommended choice. Isn't that the same as the "Yamaha Performance Series-3 13.25-inch x 14-pitch (part # MAR-GYT3B-V4-14)" propeller you decided to buy? Jim, I a...

msteinkampf

PART TWO: CHOOSING A PROPELLER I did a Google search recently for “Montauk F70 propeller continuouswave” and got 79 hits. Indeed, the question of which propeller to use for a Yamaha F70 on a Montauk 17 is so commonly posted on this discussion board that one of the moderators has a stock answer that ...

msteinkampf

PART ONE I finally decided to re-power my 1990 Montauk 17. This boat came with a 1991 Mercury 90 HP (two-stroke) outboard motor when I bought it new in November 1990. The engine has served me well, and I have enjoyed maintaining it almost as much as running it. If I operated this boat primarily to p...

msteinkampf

I used the Spectrum Desert Sand paste product on my 1990 Montauk 17 in four places. In three places, the color match was perfect. In the fourth spot, on the side of the hull about where your patch is, the repair paste was a bit darker. I'm just living with the imperfection, but if you want a perfect...

msteinkampf

[The ChatGPT answer is] not a bad assessment. The parts catalogs for the F70A and F70B are now available online at: https://yamahaoutboards.com/ Click on Owner Center and then Outboard Parts to get to the parts catalogs. Part numbers differ for the cowling, ECU, float chamber assembly, stator, and w...

msteinkampf

I’m about to re-power my Montauk 17 with a Yamaha F70. I understand Yamaha has just come out with an F70B model.

Q1: what differs on a Yamaha F70B from a Yamaha F70A?

msteinkampf

If you want the short answer, just read Phil T's post. Here is a longer answer: it depends on ... 1. What you want to do with the boat. If you are routinely pulling a slalom skier out of the water, stick with a 90 HP, or even a 100 HP if it's the same weight as the 90. If your boat is mostly used fo...

msteinkampf

Varying the amount of support using the trailer jack is a good idea. You can look at the engine swivel tube to see when you are fully supporting the weight of the engine, but not pulling up on the bracket. See my post here for details: Installing an Atlas Micro Jacker Hydraulic Jack Plate on a MONTA...

msteinkampf

I am following this discussion with interest because one of the swivel tube nuts is seized on my 1991 Mercury 90 HP outboard, and I see a similar project in my future. I would not discard the option of drilling out the swivel tube just yet. Your tube probably has an outside diameter of one inch, an ...

msteinkampf

The engine rigging on my 1990 Montauk 17 does not have an engine shut-off safety switch, and neither federal law nor Louisiana state law (where I do most of my boating) law currently requires one, but I am contemplating installing an engine shut-off safetey switch, anyway. A wirelessly-operated syst...

msteinkampf

There are three options for management of rain accumulation in a Montauk 17, and I have done them all: 1. Remove the drain plug. In my 1990 Montauk 17 with a 1991 Mercury 90 HP outboard engine and two batteries mounted at the stern, doing this will result in the accumulation of no more than one inch...

msteinkampf

Out of curiosity, I emailed Boston Whaler Customer Service to inquire what tool was used to generate the HIN tag for their hulls. I received the following reply: Unfortunately, as with other aspects of our tooling and techniques, this is proprietary production information which we are unable to rele...

msteinkampf

The duplicate HIN tag on my 1990 Montauk 17 is in the same location. See here for some discussion of duplicate or "hidden" HINs: https://continuouswave.com/forum/viewtopic.php?f=4&t=7600&p=44288&#p44288

M

msteinkampf

JimH wrote: The molded-in HIN number seen in Figure 16 for c.1973 hull looks like it was done with a Dymo Tape Label printer. But I am trying to figure out how the process was accomplished. The hull is molded in a female contact mold, so the plastic tape must have been stuck inside the mold for the...

msteinkampf

Alan-thanks for posting those HIN photographs. I thought that HIN application had progressed from metal tags (up through about 1995), transitioning to molded-in numbers in 1996, but you have dis-proven that. I just found a 1973 Sport 13 with a molded-in HIN on the starboard side. HIN 1973Sport13.jpg...

msteinkampf

I agree with Jim that relying on the claim of an owner to determine the model year of a boat is a dubious proposition, especially if that boat is for sale, so I respectfully suggest that anyone who wants to post information about a particular style or location for their HIN tag in this discussion in...

msteinkampf

I agree with your sentiments about the suboptimal quality of these photos, but it is a matter of reproducing a thumbnail image at even lower resolution. The best I can provide is a cropped image of the clearest shot I found of the "orange HIN". Hopefully there are some owners of 1996-1997 ...

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