CONTINUOUSWAVE

Regarding making a large hole through the hull that exits below the water more immune to having water penetrating the surrounding foam in the interior of a Unibond, a proven technique is to drill the hole or otherwise enlarge the diameter of the hole to be very slightly oversize, apply a coating or ...

ASIDE For readers not familiar with the use of the unit deciBel (dB) to compare a ratio of two power levels, the definition of a deciBel (dB) is (1) dB = 10 times LOG 10 (P2/P1) where P2 and P1 are power levels. For example, if P1 = 10 and P2 =20, then the deciBel ratio is dB = 10 ti...

...I want to repair the putty box, and perhaps expand it a bit so there is more putty around the through hull than before. I don't think this is why it failed, but I assume this adds structural support to keep the fiberglass from flexing when the fitting is tightened. Based on what is seen in Figur...

Thanks for adding four illustrations and much expanded explanatory narrative so that readers now understand much better the location of the through-hull fitting (which is noted as being bronze and passed through the hull bottom) that was leaking. In this instance the through-hull fittings are much t...

The term putty box as previously used on this website refers to a section between the outer and inner hull (liner) where the foam has been excluded and replaced with a material that creates a solid and waterproof area. The purpose of this modification at the factory was to provide an area where a SO...

Method to Calculate Length of a Loss of -1 dB The loss figures available for coaxial cable are generally given for 100-foot lengths. A LOSS of N dB per 100-feet means a loss of (N dB /100) per foot. To deduce the length in feet needed to produce a loss of 1 dB, we express the relationship between l...

The transmission line that connects a transmitter to its antenna should not contribute excessive loss of power in the line itself. The power loss in the transmission line should be as low as practicable and should not exceed -1 dB. (For those not familiar with comparison of power levels using deciBe...

For a more technical look at radio propagation at 156-MHz (the VHF Marine Band), see article:

VHF Radio Propagation Over Water
https://continuouswave.com/whaler/refer ... Water.html

Q1: what is the transom height for [an unspecified model year] SPORT 15? The transom height of a classic era SPORT 15 is 20-inches. Read more about the 15-foot hull in the REFERENCE section articles beginning at https://continuouswave.com/whaler/reference/15/ The only Boston Whaler boats with a not...

Our 2025 Honda CRV hybrid has a recommended 600 mile break-in procedure. I won't go into the details but the recommendation is to avoid full throttle acceleration, hard breaking, etc. The recommendation is supposedly due to the high output to displacement ratio of most newer engines. Thanks for tha...

The elaborate regimine for engine use during "break-in" seems to be something that has occurred with marine outboard engines using four-stroke-power-cycle designs. For perhaps 100-years four-stroke-power-cycle engines have been used in automobiles, and I do not recall any special condition...

You are going to faint when you see the retail price of new marine fuel hose certified A1-15 Alcohol Resistant. Perhaps you can locate a more affordable source than your local West Marine store, where it is $10-per-foot.

I was curious about the 5.5-MPH loss in top boat speed from the 90-HP to the 70-HP. Using the Crouch Speed Prediction formula as implemented in my Crouch's Calculator , the following inferences can be made: Assuming the boat weight in both tests was the same, all other influences on engine power out...

An often mentioned assumption by boaters or others not familiar with radio propagation is that at VHF frequencies communication between stations is limited to "line of sight" (LOS) distances. This is not particularly accurate. Radio waves are electro-magnetic waves and when they propagate ...

A common question among boaters or others not particularly familiar with transmission lines, antennas, and VSWR is: Q1: does changing the length of a transmission line affect the VSWR on the transmission line? The short answer is no, the length of a transmission line does not affect the VSWR. A more...

Yes, the several accessories are not specific to a particular 70-HP engine, and could by useful with many OMC engines of that era.

The 6-gallon on-deck fuel tanks are also quite fungible, as those tanks are still in demand.

A good location for a Boston Whaler get-together is often at a local Boston Whaler dealer—if the dealer is located on the water.

I think you meant to point to only this post: https://www.thehulltruth.com/8928693-post15.html You pointed to the entire discussion, and in that discussion there were advocates for the primer bulb to be both upstream and downstream of a fuel filter. On the topic of creating pressure, one advocate pr...

From your narrative I am inferring that the remaining part of what was once a ring terminal connector that broke apart and fell off the machine screw binding it to the metal fuel filler was mistaken for a male spade connector in your initial examination of the loose conductor you found in the stern ...

Generally one would assess the value of a used item on the cost of a similar new item. In the cases of a 70-HP outboard engine with all remote controls, cables, harnesses, gauges, and other items, the new cost would very likely exceed $10,000. On that basis you would think that some reasonable fract...

Q6: What is the gear ratio of your engine?

Q7: What is the engine manufacturer’s specified optimum engine speed range for full throttle.

Q8: How much are you willing to spend for a steel propeller that will provide maximum boat speed?

Figure 5 shows the fuel hoses being used have a gray external covering. However, the hoses do not appear to have the "metallic" gray appearance that was a birthmark of hoses that had a notorious history of becoming blocked when a liner to the inner portion became detached from the outer ho...

The presence of a rigging tunnel on any Boston Whaler boat would be visually very obvious. If you don't see a rigging tunnel then there is no rigging tunnel, and particularly so on small open boat models.

Q2: what model are you asking about?

The boat seen in the illustrations above is not a product of Boston Whaler. It is also not some sort of adaptation of a Boston Whaler boat, as the hull design is unlike anything produced by Boston Whaler. The boat looks like something designed by Harley Earl, the iconic automobile stylist who was he...

Yes, the fuel filter is a metal base and a metal canister, with no place for male connector. I was asking about the fuel FILLER fitting. Usually they are metal so when the metal pump hose spout is placed into the fuel fill inlet there is an electrical connection made between the boat fuel system an...

Considering the company started in c.1960, they have been making boats for 65-years. To total 200,000 boats made suggests an annual production of 3,077 boats per year. Allowing for a two-week shut down and five-day work weeks, there are 250 production days per year, so on average they would make 12....

Q7: Is the fuel filler fitting on this particular boat made of metal?

Usually the bonding conductor is wound around the rubber hose and goes to the fuel tank.

Q8: Is the fuel tank metal?

Q3: what was the original electrical connection for this…wire [with white insulation] from the transom electrode on my 1991 OUTRAGE 17? Most likely the conductor with (what is now) white insulation was connected to some metal part of the fuel system. From your description it sound like it was termi...

Another area of a hull to which some wood trim can be added in the cockpit inwales. Using some very think strip planks to cover all that bare Desert Tan fiberglass bulkhead under the gunwales can create a pleasant wood ambiance. For an example of a boat fitted with very nice wood trim, visit Page 36...

...additions to a Boston Whalers, done tastefully and done well can, at best actually add value but, even at worst, don't seem to harm the value of a Whaler. I disagree. It is entirely possible to turn a very nice condition classic Boston Whaler into an albatross that no one wants other then the gu...

An artisan or small shop In Massachusetts or East Coast was refurbishing Boston Whaler boats and often adding additional wood trim. He was selling these reworked boats at very high prices. I can’t recall the guy’s name; maybe someone else will. The essential element in any modification to a classic ...

The launch of GPS III SV-08 by SpaceX on Saturday, May 30, 2025 was successful. Liftoff was at 1:37 p.m. EDT. The mission achieved its two goals: ⋅ the GPS satellite payload reached its intended orbit; and, ⋅ the Falcon 9 booster stage B1092 was successfully recovered by autonomo...

A June 2025 FAA posting indicates the WAAS signals now active are PRN ALLOCATION (SAT) LON 131 WAAS (Eutelsat117 West B] 117 W 133 WAAS (SES-15) 129 W 135 WAAS (IntelsatGalaxy 30) 125 W Geo Footprint Map at https://www.nstb.tc.faa.gov/images/GeoFootPrint_Alaska.png?req_ti...

In April 2025 I bought a nice “12-Volt” 10-Ampere bench power supply on Amazon, a PYRAMID PS12KX model for only $57. The supply uses linear voltage regulation, which generally produces less residual voltage ripple and is often more reliable than the now-common and much more compact switching-mode re...

In December 2024 I took some great advice (see details below) about four components being sold on Amazon.com that would be very useful for measuring the voltage standing wave ratio (VSWR) on a coaxial cable transmission line feeding a VHF Marine band antenna by using a 25-Watt fixed-mount VHF Marine...

To see what an REVENGE 20 W-T notched transom is supposed to look like go to https://continuouswave.com/jimh/Revenge20WT/ There appears to be a lot of non-OEM stuff on your prospective buy. A soft center deck is a big repair. Read the two-part article at https://continuouswave.com/whaler/reference/o...

Today the state with probably the most boat builders and marine oriented allied tradesmen is Florida. In terms of what element of a boat is likely to be damaged, bow railings should be near the top of the list. Artisans who work with stainless steel tubing for boats include boat canvas makers. Perha...

Find out who was the OEM vendor for the railing. I doubt that Boston Whaler actually fabricated the railing themselves. The OEM vendor might still have the template from 25-years ago and possibly could make a new railing—but I think that is a longshot.

The GPS III SV-08 launch is now scheduled for Friday, May 30, 2025, with a SPACE X FALCON 9 Block 5 rocket as the launch vehicle. This marks the second consecutive time that the original contractor, United Launch Alliance, was unable to provide their Vulcan rocket on-time, and Space X is taking over...

Choosing a top brand is always a good decision, even though it may initially cost more. Yamaha outboard engines have a very good reputation.

Regarding the maximum boat speed and engine speeds: getting to the maximum boat speed generally means that the propeller is very well matched to the load, and the engine can continue to accelerate under load to a speed that is just about the maximum allowed engine speed, thus producing what is often...

Q1:In the image provided in Figure 1, is the freeboard of the transom considered to be sitting lower than normal or is that how it should look? The boat show in Figure 1 is a very normal hull with a very normal engine with a not-very-heavy guy standing near the stern in cold freshwater. On that bas...

Contact a Boston Whaler dealer like SUE LODAL at THE BOAT HOUSE or the guys at NAUSET MARINE to get a price on an OEM replacement rub rail for your unspecified model year 305 CONQUEST. If you buy a 100-foot roll from the OEM you will have a lot of expensive rub rail left over. For up-to-date contact...

I went to my local outboard dealer today and the 40-HP engine was $6,000, plus controls, propeller, and fitting it all, and with tax was close to $8,500! Even for today's inflated prices, it sound like that dealer really does not want to sell you an engine and install it on your 50-year-old boat. T...

I have added a large PDF file that contains 47 original drawings from Boston Whaler that give the details of the sail rigging for the SQUALL 9 model. See Drawings of Boston Whaler Components Available Online https://continuouswave.com/whaler/reference/drawings.html These drawings are scans of the or...

The entire package of 47 detailed drawings for the rigging of the SQUALL is now available for download at

https://continuouswave.com/whaler/refer ... agrams.pdf

You are in luck with a 1973 13-footer because that model year should have a transom height of 20-inches, instead of the 15-inch-high transom used in older models. But you are right at the epoch when the transom height changed, so you should look carefully at the boat to see if the transom has a notc...

Q2: would a 13-footer with a 40-HP be strong enough to tow a teenager? I remember my wife's aunt had a 13-footer with a 30-HP (pull-start) engine, and you could water ski behind it. But the engine was a classic Johnson two-stroke-power-cycle engine, with good low-RPM torque. https://continuouswave....

See the REFERENCE section article on the classic 15-footer at

https://continuouswave.com/whaler/reference/15/

The bare hull should be about 500 to 550-lbs.

Your most interesting sidebar on Toshiba is also much appreciated. Regarding propellers for submarines, I have always pondered the notion that is often attributed to outboard engine propellers that ascribes to a particular propeller the capability to be bow-lifting or stern-lifting (or sometimes bot...

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