Search found 9018 matches

by jimh
Thu Apr 22, 2021 3:15 pm
Forum: The GAM
Topic: Future of Marine Charts in USA
Replies: 22
Views: 9335

Re: Future of Marine Charts in USA

Thanks for the update from NOAA on how eliminating paper charts will lead to better ENC charts. In case you haven't looked at ENC charts and compared them to paper charts, there is certain plenty of room for ENC charts to "improve" until they get to the level of the old paper charts. As fa...
by jimh
Thu Apr 22, 2021 3:08 pm
Forum: PERFORMANCE
Topic: Crouch's Calculator Restored
Replies: 3
Views: 72

Re: Crouch's Calculator Restored

The term called the Hull Factor Coefficient really converts ALL the units involved. The formula works only for power in HP, weight in LBS, but can work for speed in either statute-miles-per-hour (MPH) or nautical-miles-per-hour (NMPH or KNOT) by just adjusting the coefficient. In the example you cit...
by jimh
Thu Apr 22, 2021 10:27 am
Forum: GLOBAL NAVIGATION SATELLITE SYSTEMS
Topic: GPS III SV-05 Launch
Replies: 1
Views: 576

Re: GPS III SV-05 Launch

A SpaceX Falcon 9 rocket will launch the GPS III SV-05 mission on Thursday, June 17, 2021 at 10:00 PM (UTC) according to information at

https://www.rocketlaunch.live/launch/gps-iii-5
by jimh
Thu Apr 22, 2021 10:21 am
Forum: SMALL BOAT ELECTRICAL
Topic: Charging Two Batteries in Parallel
Replies: 2
Views: 50

Re: Charging Two Batteries in Parallel

On the corollary and unmentioned topic of management of power distribution with two batteries available and for management of the re-charging of the two batteries, the best arrangement will provide for isolation of the two batteries and their loads from each other, and for isolation of the re-chargi...
by jimh
Wed Apr 21, 2021 7:18 pm
Forum: SMALL BOAT ELECTRICAL
Topic: Charging Two Batteries in Parallel
Replies: 2
Views: 50

Re: Charging Two Batteries in Parallel

Is there any harm in connecting a deep cycle battery to the starting battery in parallel? As long as the two batteries are of the same type, for example, both lead-acid batteries, and as long as they are both in good condition, that is, neither has a shorted cell and neither has any internal parasi...
by jimh
Wed Apr 21, 2021 10:11 am
Forum: The GAM
Topic: New 2021 220 Dauntless Information Sought
Replies: 6
Views: 150

Re: New 2021 220 Dauntless Information Sought

With options for 200 and 225-HP, I was curious how the top speed of the 2021 220 DAUNTLESS would drop off with those smaller engines. Again, using the Crouch Speed Predicting Method and my Crouch's Calculator , and using the hull factor coefficient of 209 previously calculated, I predicted speed wit...
by jimh
Wed Apr 21, 2021 9:23 am
Forum: The GAM
Topic: New 2021 220 Dauntless Information Sought
Replies: 6
Views: 150

Re: New 2021 220 Dauntless Information Sought

There is a recorded presentation of a walk-through on a 2021 220 DAUNTLESS boat on youTube at https://www.youtube.com/watch?v=Gh8_ISYvSyo&t=1s The presenter, Marilyn DeMartini, makes a humorous gaff: she describes the reversible pilot seat as having "cantillated storage" as she demonst...
by jimh
Wed Apr 21, 2021 8:24 am
Forum: REPAIRS and MODIFICATIONS
Topic: OEM Instrument Panel Plastic
Replies: 21
Views: 2347

Re: OEM Instrument Panel Plastic

The thickness of the plastic sheet for the panels as seen in Figure 11 surprises me. What is that dimension? Your cut for the curved upper edge of the panel looks good. Nice work with a jig saw. I suspect there was some sanding. I like the edge bevel on the panel. Re the the white outlines on the pa...
by jimh
Wed Apr 21, 2021 8:12 am
Forum: REPAIRS and MODIFICATIONS
Topic: OEM Instrument Panel Plastic
Replies: 21
Views: 2347

Re: OEM Instrument Panel Plastic

What is the part number for the OEM circuit breaker panel? It is a bit hard to read the number from Figure 12.
by jimh
Wed Apr 21, 2021 7:44 am
Forum: The GAM
Topic: New 2021 220 Dauntless Information Sought
Replies: 6
Views: 150

Re: New 2021 220 Dauntless Information Sought

Looking at some of the options for the 2021 220 DAUNTLESS, I was surprised to find the upcharge for the 250-HP engine and for change in cowling paint color. The base engine is a 200-HP Mercury V6 with black cowling. Changing the cowling paint to white costs $2,090. That seems incredibly high for a c...
by jimh
Tue Apr 20, 2021 2:44 pm
Forum: The GAM
Topic: New 2021 220 Dauntless Information Sought
Replies: 6
Views: 150

Re: New 2021 220 Dauntless Information Sought

The Boston Whaler website is already providing extensive information about the 2021 220 DAUNTLESS boat. There is detailed performance information of the 2021 220 DAUNTLESS , as Boston Whaler always provides for its boats. According to the Boston Whaler test data, the boat as tested weighed 4,149-lbs...
by jimh
Tue Apr 20, 2021 10:13 am
Forum: The GAM
Topic: New 2021 220 Dauntless Information Sought
Replies: 6
Views: 150

Re: New 2021 220 Dauntless Information Sought

With a suggested MSRP "starting price" of $83,575, and an introduction of just this month, April 2021, I doubt there are very many owners of the new 220 DAUNTLESS, and I doubt they have much time underway with the boat to provide a comprehensive review of it. Is there something more specif...
by jimh
Tue Apr 20, 2021 9:24 am
Forum: REPAIRS and MODIFICATIONS
Topic: 1996 MONTAUK 17: Leak at cockpit sump drain
Replies: 28
Views: 254

Re: 1996 MONTAUK 17: Leak at cockpit sump drain

In regard to replacement on Boston Whaler boats of plastic through hull drains, Boston Whaler published a recorded presentation demonstrating their suggested method several years ago on youTube. See: https://www.youtube.com/watch?v=Zby76eoKO-I&t=4s From the ease that the original through-hull dr...
by jimh
Tue Apr 20, 2021 9:06 am
Forum: REPAIRS and MODIFICATIONS
Topic: Remote Engine Shift and Throttle Controls for a KATAMA Console
Replies: 1
Views: 50

Re: Remote Engine Shift and Throttle Controls for a KATAMA Console

The unusual console of a KATAMA can be seen in CETACEA. See

http://continuouswave.com/whaler/cetace ... age30.html

Use a top-mount remote engine throttle and shift control. Mount it on the console top surface.

KATAMA_Console.jpg
Fig. 1. A KATAMA console with top-mounted engine remote throttle and shift controls.
KATAMA_Console.jpg (14.98 KiB) Viewed 33 times
by jimh
Mon Apr 19, 2021 7:14 pm
Forum: The GAM
Topic: OUTRAGE 25 Transom Strength: HP-rating; Engine Weight
Replies: 15
Views: 304

Re: OUTRAGE 25 Transom Strength: HP-rating; Engine Weight

Recreational hulls in the 1980’s were (and still are) really sold only to authorized dealers, and that dealer would install the engines. Hulls for government or municipal buyers were probably sold directly to those buyers by Boston Whale CGP. A buyer like a county sheriff probably would not want to ...
by jimh
Mon Apr 19, 2021 1:48 pm
Forum: REPAIRS and MODIFICATIONS
Topic: 1996 MONTAUK 17: Leak at cockpit sump drain
Replies: 28
Views: 254

Re: 1996 MONTAUK 17: Leak at cockpit sump drain

I've got some West System epoxy in the garage, maybe that will do the trick. I would not have any doubts about WEST System epoxy for use in a marine environment. Boat assembled with WEST System epoxy 45-years ago are still held together by that product. In terms of a marine epoxy, there really is n...
by jimh
Mon Apr 19, 2021 1:12 pm
Forum: EVINRUDE I-COMMAND, ICON Pro, ICON Touch
Topic: EV-Diagnostic 6 and E-TEC G2 Engines
Replies: 7
Views: 13258

Re: EV-Diagnostic 6 and E-TEC G2 Engines

Here is a long overdue update: the EV-Diagnostic 6 software can also be used with ICON II EST controls and with some ICON or ICON Touch gauges to deliver updates or to change settings.
by jimh
Mon Apr 19, 2021 10:03 am
Forum: PERFORMANCE
Topic: Crouch's Calculator Restored
Replies: 3
Views: 72

Re: Crouch's Calculator Restored

Regarding the usefulness or accuracy of the Crouch Speed Prediction Method as embodied in my Crouch's Calculator, I can offer the following demonstration. From data for my own boat, I have established values for horsepower, weight, and speed, as follows: HP = 225 LBS = 4300 MPH =39 to 40 Using those...
by jimh
Mon Apr 19, 2021 9:44 am
Forum: REPAIRS and MODIFICATIONS
Topic: 1970 NAUSET 16: Sealing Fastener Holes in Transom
Replies: 6
Views: 109

Re: 1970 NAUSET 16: Sealing Fastener Holes in Transom

Re the cure time for 3M5200: that product takes about a week to completely cure in air. To cure underwater takes even longer.
by jimh
Mon Apr 19, 2021 9:39 am
Forum: REPAIRS and MODIFICATIONS
Topic: 1970 NAUSET 16: Sealing Fastener Holes in Transom
Replies: 6
Views: 109

Re: 1970 NAUSET 16: Sealing Fastener Holes in Transom

I believe I can comprehend your situation without needing to see an audio and video presentation. To fill and seal old holes from fasteners that were below the water line on the transom, the holes should be dry. If water continually seeps out from an old fastener hole, that is a sign water has been ...
by jimh
Sun Apr 18, 2021 12:55 pm
Forum: SMALL BOAT ELECTRICAL
Topic: Wiring for Navigation Lighting, Specific to a particular manufacturer, year, and model
Replies: 3
Views: 178

Re: Wiring for Navigation Lighting, Specific to a particular manufacturer, year, and model

Regarding the wire insulation color on marine electrical installations, the positive circuit wiring for navigation lamps is usually carried on a conductor with GRAY insulation. For more advice on marine electrical wire color codes see Marine Wiring Color Codes http://continuouswave.com/whaler/refere...
by jimh
Sun Apr 18, 2021 12:37 pm
Forum: The GAM
Topic: The WHALER 27 Models and hull dimensions
Replies: 2
Views: 109

Re: The WHALER 27 Models and hull dimensions

Your inquires about other models than the WHALER 27, WHALER 27 FULL CABIN, and WHALER 27 WALKAROUND are interesting, but not covered in my most recent new research. Perhaps you can research those models and post a separate article. Here I was just looking at the WHALER 27 models. The three distinct ...
by jimh
Sun Apr 18, 2021 12:05 pm
Forum: REPAIRS and MODIFICATIONS
Topic: 1996 MONTAUK 17: Leak at cockpit sump drain
Replies: 28
Views: 254

Re: 1996 MONTAUK 17: Leak at cockpit sump drain

That the c.1996 MONTAUK 17 had plastic through-hull drain fittings is quite interesting. I don't recall any mention of the change to plastic fittings from the brass tube fitting before in the MONTAUK models. That the drains are all plastic is new information. Perhaps Boston Whaler made that change t...
by jimh
Sun Apr 18, 2021 11:52 am
Forum: REPAIRS and MODIFICATIONS
Topic: 1996 MONTAUK 17: Leak at cockpit sump drain
Replies: 28
Views: 254

Re: 1996 MONTAUK 17: Leak at cockpit sump drain

Using 3M5200 was probably a mistake. Removal may be difficult, as you already commented. As I recall, there may be a solvent that helps loosen 3M5200. However, I have no idea what such a solvent might do to the foam in the interior of the Unibond hull. Proceed cautiously with any sort of solvent you...
by jimh
Sun Apr 18, 2021 5:02 am
Forum: REPAIRS and MODIFICATIONS
Topic: 1993 Evinrude 48SPL: Removing Upper Bearing
Replies: 8
Views: 129

Re: 1993 Evinrude 48SPL: Removing Upper Bearing

Congratulations on being able to remove the upper bearing from the 1993 Evinrude 48SPL. You persistence has paid off. I guess you really wanted to change that bearing.
by jimh
Sun Apr 18, 2021 4:58 am
Forum: REPAIRS and MODIFICATIONS
Topic: 2001 Dauntless 16 Replacement Windshield; Sump Pump; Bottom Paint
Replies: 6
Views: 68

Re: 2001 Dauntless 16 Replacement Windshield; Sump Pump; Bottom Paint

I am torn as to whether or not the [hull] bottom should be re-painted. The hull has some barnacles that need removing. The paint seems spotty in places. If there is substantial marine growth already attached to the hull bottom, then clearly the anti-fouling paint was inadequate in preventing the gr...
by jimh
Sun Apr 18, 2021 4:52 am
Forum: REPAIRS and MODIFICATIONS
Topic: 2001 Dauntless 16 Replacement Windshield; Sump Pump; Bottom Paint
Replies: 6
Views: 68

Re: 2001 Dauntless 16 Replacement Windshield; Sump Pump; Bottom Paint

Q2: what is the appropriate size [for a replacement windshield for a 2001 DAUNTLESS 16]? Q3: what is the size [for a replacement windshield for a 2001 DAUNTLESS 16]? I don't understand the difference between Q2 and Q3. A replacement windshield needs to be the correct size to fit onto the center con...
by jimh
Sun Apr 18, 2021 4:50 am
Forum: REPAIRS and MODIFICATIONS
Topic: 2001 Dauntless 16 Replacement Windshield; Sump Pump; Bottom Paint
Replies: 6
Views: 68

Re: 2001 Dauntless 16 Replacement Windshield; Sump Pump; Bottom Paint

Give me a suggestion for a replacement sump pump. I suggest you replace the existing electric sump pump with a similar model. The brand and model are usually very clearly marked on the pump housing. The RULE brand centrifugal pump is a very common pump used by Boston Whaler to evacuate water from a...
by jimh
Sun Apr 18, 2021 4:49 am
Forum: REPAIRS and MODIFICATIONS
Topic: 2001 Dauntless 16 Replacement Windshield; Sump Pump; Bottom Paint
Replies: 6
Views: 68

Re: 2001 Dauntless 16 Replacement Windshield; Sump Pump; Bottom Paint

Q1: Where can I purchase [a replacement windshield for 2001 DAUNTLESS 16]? A1: I doubt there is an off-the-shelf replacement windshield available available from a general boat supply store. Contact your Boston Whaler dealer to see if there is a replacement part available from Boston Whaler. Also co...
by jimh
Sat Apr 17, 2021 8:22 pm
Forum: REPAIRS and MODIFICATIONS
Topic: 1996 MONTAUK 17: Leak at cockpit sump drain
Replies: 28
Views: 254

Re: 1996 MONTAUK 17: Leak at cockpit sump drain

It is much easier to stop more water from getting into the hull foam than it is to get water out of the hull foam. When a drain tube passes through the Unibond hull of a Boston Whaler boat, the hole it passes through was probably not treated with any sort of sealant at the factory in the original fa...
by jimh
Sat Apr 17, 2021 7:53 pm
Forum: PERFORMANCE
Topic: Crouch's Calculator Restored
Replies: 3
Views: 72

Crouch's Calculator Restored

I am again very pleased to announce that another boat performance calculator, the Crouch's Calculator, has now been restored to operation. The new version is a complete re-write of the old calculator with a new code base. The new Crouch's Calculator can be found at http://continuouswave.com/calculat...
by jimh
Sat Apr 17, 2021 3:01 pm
Forum: The GAM
Topic: The WHALER 27 Models and hull dimensions
Replies: 2
Views: 109

The WHALER 27 Models and hull dimensions

One of the larger classic-era Boston Whaler boats was a model called the WHALER 27. These boats were generally listed by Boston Whaler under the grouping of SPORTFISHING MODELS. All models with this designation share the same hull, with these dimensions: LOA: 26-feet 7-inches, except the Whaler Driv...
by jimh
Sat Apr 17, 2021 2:16 pm
Forum: VHF MARINE RADIO
Topic: Effect of Transmission Line Loss on VSWR Measurement
Replies: 0
Views: 24

Effect of Transmission Line Loss on VSWR Measurement

This article is a brief primer on how loss in a transmission line between transmitter and antenna can affect VSWR measurements taken at the transmitter end of the transmission line loss. First, to understand VSWR you need to know that if an antenna impedance is a mismatch for the transmission line i...
by jimh
Sat Apr 17, 2021 1:59 pm
Forum: REPAIRS and MODIFICATIONS
Topic: 1993 Evinrude 48SPL: Removing Upper Bearing
Replies: 8
Views: 129

Re: 1993 Evinrude 48SPL: Removing Upper Bearing

So far I have about five hours into this so that translates to $500 shop hours I saved. Investing $500 in shop labor to rehabilitate a c.1993 high-emission two-stroke-power-cycle engine might not be the best money ever spent. You need an local long-time OMC dealer who never throws away any old engi...
by jimh
Sat Apr 17, 2021 11:32 am
Forum: REPAIRS and MODIFICATIONS
Topic: 1993 Evinrude 48SPL: Removing Upper Bearing
Replies: 8
Views: 129

Re: 1993 Evinrude 48SPL: Removing Upper Bearing

At one time I had a 1987 Yamaha 70-HP engine. The propeller shaft seal needed replacement in c.2003. The seal was the original, so it was 16-years-old. The engine had been used occasionally in saltwater. There was a large diameter circular aluminum retainer that was very firmly corroded in place to ...
by jimh
Fri Apr 16, 2021 2:46 pm
Forum: SMALL BOAT ELECTRICAL
Topic: Wiring for Navigation Lighting, Specific to a particular manufacturer, year, and model
Replies: 3
Views: 178

Re: Wiring for Navigation Lighting, Specific to a particular manufacturer, year, and model

Q1: On a [1986 MONTAUK 17 boat] was the original wiring from the factory [for control of the navigation lamps] installed as I will describe below? A1: the electrical circuit described in your narrative sounds appropriate. The dash panel switch provides two separately switched circuits for the posit...
by jimh
Fri Apr 16, 2021 1:53 pm
Forum: VHF MARINE RADIO
Topic: Antennas for AIS Transmitters
Replies: 0
Views: 32

Antennas for AIS Transmitters

This article will look at the requirements for an antenna for an AIS transmitter, and at the effects that occur if one antenna is to be used for both an AIS transmitter and for a VHF Marine Band ship station radio transmitter. DIFFERENT FREQUENCIES An AIS transmitter operates at 162-MHz, at the very...
by jimh
Thu Apr 15, 2021 11:14 am
Forum: PERFORMANCE
Topic: How to Raise Engine Mounting Height
Replies: 1
Views: 82

Re: How to Raise Engine Mounting Height

Methods of raising the engine mounting height vary. See

http://www.continuouswave.com/ubb/Forum4/HTML/000172.html

for descriptions of several methods.
by jimh
Thu Apr 15, 2021 9:29 am
Forum: PERFORMANCE
Topic: SUZUKI DF60 Owners Sought For Comments
Replies: 4
Views: 125

Re: SUZUKI DF60 Owners Sought For Comments

I think the original post creates confusion about the weight of modern engines, In the original post the weights mentioned are all in reference to an unspecified other engine's weight. It is hard to follow the narrative about engine weight because the only actual weight mentioned was 300-lbs for the...
by jimh
Thu Apr 15, 2021 8:29 am
Forum: PERFORMANCE
Topic: SUZUKI DF60 Owners Sought For Comments
Replies: 4
Views: 125

Re: SUZUKI DF60 Owners Sought For Comments

An account of re-powering a MONTAUK with a Yamaha F50 is given in this prior article: Storm Story: July 17, 2006, Manitoulin Island http://continuouswave.com/ubb/Forum1/HTML/013113.html You might find some useful information there with regard to the engine weight and its effect on the MONTAUK 17 hull.
by jimh
Wed Apr 14, 2021 5:30 pm
Forum: PERFORMANCE
Topic: Super Sport 15 Re-power 60-HP
Replies: 7
Views: 256

Re: Super Sport 15 Re-power 60-HP

The engine weight is 247-lbs. Max rpm is 5500-6000. Gear ratio (standard gear case) is 1.83:1 An engine weight of 247-lbs is a reasonable weight for a 15-foot hull. Compare at http://continuouswave.com/ubb/Forum4/HTML/002449.html Using 5750-RPM (the middle of the recommended maximum engine speed ra...
by jimh
Wed Apr 14, 2021 12:50 pm
Forum: The GAM
Topic: Recommend Yamaha Dealer in North Carolina; Gel Coat Repair Vendor
Replies: 3
Views: 130

Re: Recommend Yamaha Dealer in North Carolina; Gel Coat Repair Vendor

I have never heard of an age limit for a boat to qualify for a new engine. It sounds like the dealer is unfamiliar with Boston Whaler boats and their useful service life. Perhaps that dealer has some bad experiences with previous customers who put a new engine on an old boat (on its last legs) and w...
by jimh
Wed Apr 14, 2021 11:55 am
Forum: The GAM
Topic: Safety Lanyard Poll
Replies: 17
Views: 1184

Re: Safety Lanyard Poll

porthole wrote:I voted never, but that is because I have installed Fell Marine MOB's on two different boats...


I altered the poll question to refer to an "engine cut-off link", so your device is covered by that nomenclature.
by jimh
Wed Apr 14, 2021 11:31 am
Forum: PERFORMANCE
Topic: Montauk 17 with 115-HP 25-inch-shaft
Replies: 4
Views: 119

Re: Montauk 17 with 115-HP 25-inch-shaft

If the current Yamaha propeller is marked "K17" I believe the K refers to the gear case diameter, and K propellers fit the Yamaha 70 to 130-HP engines. The K gear case engines are 4.25-inch hub diameter. The "17" is the pitch rating. The propeller may be a stainless steel or an a...
by jimh
Wed Apr 14, 2021 10:56 am
Forum: The GAM
Topic: OUTRAGE 25 Transom Strength: HP-rating; Engine Weight
Replies: 15
Views: 304

Re: OUTRAGE 25 Transom Strength: HP-rating; Engine Weight

There is some irony in this discussion. There have been very few classic-era OUTRAGE hulls re-powered with a six-cylinder VERADO engine, but the one I recall seeing was on an OUTRAGE 25 hull. To see an OUTRAGE 25 with notched transom with two VERADO six-cylinder engines is really quite astonishing. ...
by jimh
Tue Apr 13, 2021 2:07 pm
Forum: REPAIRS and MODIFICATIONS
Topic: OUTRAGE 22 SUPER CONSOLE: Moving Batteries to Center Console:
Replies: 7
Views: 106

Re: OUTRAGE 22 SUPER CONSOLE: Moving Batteries to Center Console:

...by switches [moving to the recess where the fire-extinguisher was] I mean the engine battery selector switches and house battery switch. Thanks for the clarification on what you meant by "electrical switch." As I already mentioned, you will have to move the primary battery switch and p...
by jimh
Tue Apr 13, 2021 1:43 pm
Forum: REPAIRS and MODIFICATIONS
Topic: OUTRAGE 22 SUPER CONSOLE: Moving Batteries to Center Console:
Replies: 7
Views: 106

Re: OUTRAGE 22 SUPER CONSOLE: Moving Batteries to Center Console:

I plan to repurpose the fire extinguisher hatch as a electrical switch compartment. I don't think moving all the electrical switches to the old fire-extinguisher recessed panel is a good idea. How would you access those switches while piloting the boat at the helm? The usual location for any electr...
by jimh
Tue Apr 13, 2021 1:38 pm
Forum: REPAIRS and MODIFICATIONS
Topic: OUTRAGE 22 SUPER CONSOLE: Moving Batteries to Center Console:
Replies: 7
Views: 106

Re: OUTRAGE 22 SUPER CONSOLE: Moving Batteries to Center Console:

One of the pictures in your gallery shows that the access hole in the deck through which engine rigging and other cables pass DOES NOT have the usual surrounding raised plastic shield or water dam to keep water from entering the rigging tunnel. See: http://continuouswave.com/forum/download/file.php?...
by jimh
Tue Apr 13, 2021 1:28 pm
Forum: REPAIRS and MODIFICATIONS
Topic: OUTRAGE 22 SUPER CONSOLE: Moving Batteries to Center Console:
Replies: 7
Views: 106

Re: Avoiding Voltage Drop in Engine Cranking Battery Cables

I am thinking of moving the batteries to the [SUPER CONSOLE on an OUTRAGE 22 boat] console. Give input. Advice on moving the engine cranking battery out of the boat's stern and to the helm console is given in many prior discussion. I recommend this discussion in SMALL BOAT ELECTRICAL for the electr...