Search found 8980 matches

by jimh
Wed Apr 14, 2021 5:30 pm
Forum: PERFORMANCE
Topic: Super Sport 15 Re-power 60-HP
Replies: 6
Views: 173

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: 63

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 12:48 pm
Forum: The GAM
Topic: Recommend Yamaha Dealer in North Carolina; Gel Coat Repair Vendor
Replies: 3
Views: 63

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: 1061

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: 64

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: 10
Views: 165

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: 71

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: 71

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: 71

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: 71

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...
by jimh
Tue Apr 13, 2021 1:19 pm
Forum: The GAM
Topic: OUTRAGE 25 Transom Strength: HP-rating; Engine Weight
Replies: 10
Views: 165

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

A c.1986 OUTRAGE 25 with 550-HP would be a boat capable of more than 70-MPH. I am basing this on a similar OUTRAGE 25 with 400-HP that could go more than 60-MPH. Why would you want to push a 35-year-old hull to over 70-MPH? The OUTRAGE hull was not designed for those speeds. Without some added buoya...
by jimh
Mon Apr 12, 2021 4:31 pm
Forum: REPAIRS and MODIFICATIONS
Topic: Steering Wheel Paracord Wrap
Replies: 4
Views: 307

Re: Steering Wheel Paracord Wrap

Thanks for the follow-up. youTube demonstrations are often helpful. But thinking outside the box can also be helpful. I really do not see how the location of the knot must be on the outside edge of the steering wheel tube. What is your opinion of the wrap on the steering wheel in terms of an aid in ...
by jimh
Mon Apr 12, 2021 2:01 pm
Forum: PERFORMANCE
Topic: Chasing the Last MPH in Top Speed
Replies: 0
Views: 64

Chasing the Last MPH in Top Speed

Many boat owners are seeking the most performance possible from their engine and propeller by looking at the maximum boat speed possible, often in increments of speed as small as 1-MPH or less. For boats running in the 40-MPH range, a propeller of 17 to 19-pitch is typically used. With a propeller o...
by jimh
Mon Apr 12, 2021 1:28 pm
Forum: The GAM
Topic: 180 DAUNTLESS Changes During Production Epoch
Replies: 5
Views: 97

Re: 180 DAUNTLESS Changes During Production Epoch

I agree with BUTCH regarding changes to the hull. To change the hull would require an entirely new hull mold. Making new molds is a complicated and expensive process. However, I differ on the liner mold changes. Because the boat really consists of two major molded components, the hull and the liner,...
by jimh
Mon Apr 12, 2021 1:20 pm
Forum: The GAM
Topic: OEM Seat Pads for c.1972 13-footer: Need advice
Replies: 5
Views: 101

Re: OEM Seat Pads for c.1972 13-footer: Need advice

As historical artifacts, the cushions--that is the images of them and their existence--are very interesting. I do not believe cushions like these have been mentioned, seen, or discussed before. Thanks for this most interesting information.
by jimh
Mon Apr 12, 2021 1:17 pm
Forum: The GAM
Topic: OEM Seat Pads for c.1972 13-footer: Need advice
Replies: 5
Views: 101

Re: OEM Seat Pads for c.1972 13-footer: Need advice

If you want to get rid of them, you should post a notice of For-sale in MARKETPLACE and set a very low price. I am certain the cushions will be of interest to someone, more as a practical cushion to use than as an historical artifact. If getting rid of them at a very low price, you might give some c...
by jimh
Mon Apr 12, 2021 11:03 am
Forum: The GAM
Topic: 170 Montauk Instrument Panel Replacement
Replies: 11
Views: 138

Re: 170 Montauk Instrument Panel Replacement

On getting a blank plastic panel and drilling large circular holes for gauges: drilling large diameter circular holes in a thin plastic panel can be difficult and prone to damaging the plastic. If you buy an expensive blank panel, be very careful when using hole saws to make large diameter circular ...
by jimh
Mon Apr 12, 2021 10:50 am
Forum: The GAM
Topic: 170 Montauk Instrument Panel Replacement
Replies: 11
Views: 138

Re: 170 Montauk instrument panel replacement

...Replace the switch "covers" with labels...New Wire Marine sells switches and covers at reasonable prices. https://newwiremarine.com/marine-grade-switches/ I like Phil's idea. If the pre-printed switch covers are only $5, that is a bargain. It would make the refurbishment look better th...
by jimh
Mon Apr 12, 2021 10:46 am
Forum: The GAM
Topic: 170 Montauk Instrument Panel Replacement
Replies: 11
Views: 138

Re: 170 Montauk instrument panel replacement

The real problem with home-brewing (fabricating) a new panel on your own is the difficulty in making the precision rectangular holes for the several power switches. The switches fit into the panel with snap-in-place retainer latches, and the cut out in the panel must be very precisely made. If the f...
by jimh
Mon Apr 12, 2021 10:18 am
Forum: The GAM
Topic: 180 DAUNTLESS Changes During Production Epoch
Replies: 5
Views: 97

Re: 180 DAUNTLESS Changes During Production Epoch

BolinasWhaler wrote:...to answer your question...

I did not have a question about what changes you were interested in. I just want to know when the boat began and ended production. I think the first step in finding out what changed during production is to first find out when production began and when it ended.
by jimh
Sun Apr 11, 2021 11:37 pm
Forum: PERFORMANCE
Topic: Sport 15, 30-HP
Replies: 2
Views: 81

Re: Sport 15, 30-HP

See the REFERENCE Section article on the 15-foot hull. The minimum horsepower to put the 15-foot hull on plane is given there: http://continuouswave.com/whaler/reference/15/ The minimum horsepower recommendation (20-HP) is for a very lightly loaded boat. I recommend you buy a new Yamaha F50. You wil...
by jimh
Sun Apr 11, 2021 11:24 pm
Forum: REPAIRS and MODIFICATIONS
Topic: 1986 Montauk Rot
Replies: 2
Views: 115

Re: 1986 Montauk Rot

Embedded wood under the cockpit deck can become rotted and soft if freshwater has been allowed to get through holes in the deck laminate and gel coat and seep into the wood. Even boats kept in saltwater can get fresh water under the deck if rain has been allowed to accumulate and the deck has unseal...
by jimh
Sun Apr 11, 2021 11:12 pm
Forum: The GAM
Topic: 180 DAUNTLESS Changes During Production Epoch
Replies: 5
Views: 97

Re: 180 DAUNTLESS Changes During Production Epoch

What changed in the the design of a 180 DAUNTLESS over its years? Can you be more specific about the year range that is "over its years"? What year was the 180 DAUNLTESS introduced? What year did 180 DAUNTLESS production end? Re other articles on the 180 DAUNTLESS: to find resources on th...
by jimh
Sun Apr 11, 2021 9:31 am
Forum: PERFORMANCE
Topic: 2001 Montauk 17 115-HP
Replies: 11
Views: 1126

Re: 2001 Montauk 17 115-HP

Please renew this thread when you get another propeller and have more test data to present.
by jimh
Sat Apr 10, 2021 9:39 pm
Forum: SMALL BOAT ELECTRICAL
Topic: Battery Has Odor of Vinegar
Replies: 3
Views: 108

Re: Battery Has Odor of Vinegar

Adding water to a lead-acid battery electrolyte dilutes the concentration of the acid and reduces the electrical stored charge in the storage battery. If the electrolyte level is low, water should be added to restore the electrolyte to the proper level, and then the battery should be charged to incr...
by jimh
Sat Apr 10, 2021 5:50 pm
Forum: MARKETPLACE
Topic: Appraisal: 1989 Eagle Tandem Axel Trailer
Replies: 4
Views: 135

Re: Appraisal: 1989 Eagle Tandem Axel Trailer

I cannot see much detail in Figure 1, but my general experience with EAGLE trailers--made near me and popular--is they generally have all the hull support brackets welded in place. The trailer is more or less custom or unique to the boat that is to be trailered on it. For that reason, the value of t...
by jimh
Sat Apr 10, 2021 5:43 pm
Forum: The GAM
Topic: A c.1985 SPORT 15: Island Shuttle; Work; Plans; Weather, Future
Replies: 4
Views: 567

Re: A c.1985 SPORT 15: Island Shuttle; Work; Plans; Weather, Future

Re the confusion over the year of manufacture: the federal HIN will clearly identify the model year and year of production. Re the SPORT 15: the best small skiff ever made. I used to have one and loved that boat. By the way, your SPORT 15 has the seat back option. That is a nice upgrade from the pla...
by jimh
Sat Apr 10, 2021 1:35 pm
Forum: REPAIRS and MODIFICATIONS
Topic: Steering Wheel Paracord Wrap
Replies: 4
Views: 307

Re: Steering Wheel Paracord Wrap

Is there a particular reason the knots are on the outside diameter of the outer tube of wheel?

I would expect that having the knots on the inside edge would give the palm of your hand on the wheel a better feel.
by jimh
Fri Apr 09, 2021 11:05 am
Forum: The GAM
Topic: 170 Montauk on Hoist
Replies: 13
Views: 377

Re: 170 Montauk on Hoist

Regarding why Boston Whaler explicitly cautions against lifting the 170 MONTAUK by its lifting eyes for "long term", it has been suggested that this is due to concern about exposing Boston Whaler to risk of being "liable" for some future harm. I think the risk is clearly laid out...
by jimh
Fri Apr 09, 2021 10:58 am
Forum: The GAM
Topic: 170 Montauk on Hoist
Replies: 13
Views: 377

Re: 170 Montauk on Hoist

In order to create the least stress on the attachment points on the boat for hoisting, the direction of the lifting force should be completely vertical, that is, the hoist rope (or chain or strap) should be hanging down perfectly vertically when connected to each eye. In this way there won't be any ...
by jimh
Fri Apr 09, 2021 10:24 am
Forum: The GAM
Topic: 170 Montauk on Hoist
Replies: 13
Views: 377

Re: 170 Montauk on Hoist

What is the dimension for the distance between the I-beams the support the hoists in Figure 1? Is the location of the hoists on the beam supports fixed or moveable? From Figure 1 I infer the boathouse is open to the sea on the right. [Note: I reoriented the image files in Figure 1 and 2 to make the ...
by jimh
Fri Apr 09, 2021 10:01 am
Forum: MARKETPLACE
Topic: Appraisal: 1989 Eagle Tandem Axel Trailer
Replies: 4
Views: 135

Re: Appraisal: 1989 Eagle Tandem Axel Trailer

From the boat registration it appears the trailer is located in Ontario, Canada. Since the trailer is a painted steel trailer, I presume that the trailer has been used in freshwater exclusively. If the painted steel trailer has been used in saltwater its value would be lower. If the trailer is in ro...
by jimh
Fri Apr 09, 2021 7:42 am
Forum: SMALL BOAT ELECTRICAL
Topic: Battery Has Odor of Vinegar
Replies: 3
Views: 108

Re: Battery Has Odor of Vinegar

The odor associated with vinegar is acetic acid. A lead-acid battery uses sulfuric acid. The smell of sulfuric acid is somewhat similar to the smell of acetic acid. According to one automotive website, people are known to describe the smell of their battery as being like vinegar. Cf.: https://autogu...
by jimh
Thu Apr 08, 2021 6:17 pm
Forum: The GAM
Topic: Propeller Calculator Restored
Replies: 0
Views: 47

Propeller Calculator Restored

The propeller calculator is back. See

viewtopic.php?f=7&t=6317

for details.
by jimh
Thu Apr 08, 2021 6:09 pm
Forum: PERFORMANCE
Topic: Propeller Calculator Restored
Replies: 0
Views: 71

Propeller Calculator Restored

I am very pleased to announce that I have restored the PROPELLER CALCULATOR at the continuouswave.com website. I have created two versions: one for speed units in statute-miles-per hour or MPH and another for speed units in nautical-miles-per-hour or KNOTS Propeller Calculator for MPH Propeller Calc...
by jimh
Thu Apr 08, 2021 6:00 pm
Forum: PERFORMANCE
Topic: 1974 Revenge 21 - 2020 Mercury ProXS 200
Replies: 16
Views: 478

Re: 1974 Revenge 21 - 2020 Mercury ProXS 200

For this data set:
RPM = 6200
RATIO = 1.846
PITCH = 17
SLIP = 2.7

The calculated MPH is 52.6-MPH.

There is no certainty that the absolute most horsepower from the engine is occuring at the absolute maximum engine speed of 6,200-RPM. The horsepower peak might be a bit lower in terms of RPM.
by jimh
Thu Apr 08, 2021 5:10 pm
Forum: REPAIRS and MODIFICATIONS
Topic: Drain Tube Replacement on 13-footer
Replies: 12
Views: 3006

Re: Drain Tube Replacement on 13-footer

Sailfish_wc wrote:I'd like to know myself
Q1: did it have a brass tube like the transom drain?
Q2: Other?


I don't understand what you want to know.

I don't understand in Q1 what "it" refers to.

I don't understand in Q2 what you mean by the single word, "Other".
by jimh
Thu Apr 08, 2021 5:01 pm
Forum: PERFORMANCE
Topic: Super Sport 15 Re-power 60-HP
Replies: 6
Views: 173

Re: Super Sport 15 Re-power 60-HP

What is the gear ratio of the engine? What is the maximum recommended engine speed in RPM? What is the weight of the engine? As a starting point for engine mounting height, installing the engine at one-hole-up from lowest is a safe initial point. Some enthusiasts will recommend starting at two-holes...
by jimh
Thu Apr 08, 2021 1:46 pm
Forum: PERFORMANCE
Topic: 1974 Revenge 21 - 2020 Mercury ProXS 200
Replies: 16
Views: 478

Re: 1974 Revenge 21 - 2020 Mercury ProXS 200

Re the ENERTIA and what might occur with a pitch down to 17 from 18: The initial test propellor was a Mirage 15.5 x 17p: Top speed was 50-MPH SOG by GNSS at 6100-RPM. That works out to a SLIP of 5.8. That is about what I would expect with a MIRAGE plus and that is a good value. With an Enertia 14.2 ...
by jimh
Thu Apr 08, 2021 1:40 pm
Forum: PERFORMANCE
Topic: 1974 Revenge 21 - 2020 Mercury ProXS 200
Replies: 16
Views: 478

Re: 1974 Revenge 21 - 2020 Mercury ProXS 200

Also, and not to be overlooked: that Mercury ProXS V8 looks marvelous on your extremely well-preserved (and I image extremely well-restored) REVENGE 21. As for top speed, heck, 52-MPH is like a rocket ship for me. The boat is 47-years-old. If you want to get another 47-years of use from it, you prob...
by jimh
Thu Apr 08, 2021 1:29 pm
Forum: The GAM
Topic: Aqua One Bottom Paint
Replies: 4
Views: 336

Re: Aqua One Bottom Paint

ASIDE: with almost all of my boating now in the cold, clear, freshwater of Lake Michigan, I don't worry about marine growth and anti-fouling paint, and because the boat is never in the water for more than perhaps one week at most at any stretch, I don't worry about using a bottom sealing coat. The b...
by jimh
Thu Apr 08, 2021 10:23 am
Forum: SMALL BOAT ELECTRICAL
Topic: Power Distribution on 13-foot Skiff
Replies: 8
Views: 442

Re: Power Distribution on 13-foot Skiff

Regarding accommodation in electrical wiring for devices that are anticipated to need frequent removal or that will be fabricated as separate assemblies and then joined electrically upon installation: the most common method to provide for a simple disconnect between electrical cables is to use a con...
by jimh
Thu Apr 08, 2021 7:41 am
Forum: SMALL BOAT ELECTRICAL
Topic: Power Distribution on 13-foot Skiff
Replies: 8
Views: 442

Re: Power Distribution on 13-foot Skiff

PATSEA--I don't see any Blue Sea Systems product with part number 4056. I think that number is wrong. But I like the concept of a Blue Sea Systems water-resistant fuse panel. I searched at Blue Sea Systems and found they have a new product, a water-resistant fuse panel, that is part number 5056. Thi...
by jimh
Thu Apr 08, 2021 7:37 am
Forum: REPAIRS and MODIFICATIONS
Topic: Outrage 22 Cuddy Leak Repair
Replies: 5
Views: 255

Re: Outrage 22 Cuddy Leak Repair

Posting a question or a request in this thread to someone who made a comment 18-years ago in another thread is not a particularly good way to get their attention. As it happens, the person you are addressing is still participating in the website. You should send him an email. His username is "D...
by jimh
Thu Apr 08, 2021 7:12 am
Forum: The GAM
Topic: 170 Montauk on Hoist
Replies: 13
Views: 377

Re: 170 Montauk on Hoist

With regard to the exact duration of a period of time described as "short-term", I would ask Boston Whaler for a specification. To me, short-term means an hour. What Boston Whaler is clearly saying: don't hoist the 170 MONTAUK by the bow and stern eyes and let it hang that way for days or ...
by jimh
Thu Apr 08, 2021 6:49 am
Forum: The GAM
Topic: FRONTIER Value, Ride
Replies: 5
Views: 288

Re: FRONTIER Value, Ride

Re the OFFSHORE 27: I have always admired the look of the OFFSHORE 27. I have never been aboard one. I was somewhat surprised to read some less than enthusiastic comments about the ride qualities of the 27-foot classic hull from someone who was out on one in the Pacific Ocean. The classic 25-foot hu...
by jimh
Thu Apr 08, 2021 6:18 am
Forum: PERFORMANCE
Topic: 1974 Revenge 21 - 2020 Mercury ProXS 200
Replies: 16
Views: 478

Re: 1974 Revenge 21 - 2020 Mercury ProXS 200

sraab928 wrote:The center of the upper mounting hole in the transom to the top of the transom is 1-3/4-inch
Thanks for checking. That hole location is, if anything, a bit high, and not too low as I thought it was from the picture. The usual dimension is 1-7/8-inches.
by jimh
Wed Apr 07, 2021 10:01 am
Forum: PERFORMANCE
Topic: 1974 Revenge 21 - 2020 Mercury ProXS 200
Replies: 16
Views: 478

Re: 1974 Revenge 21 - 2020 Mercury ProXS 200

Please check the location of the upper engine mounting holes on the transom. Refer to this image hosted elsewhere: https://hosting.photobucket.com/images/v472/sraab928/IMG_5889(1).jpg As seen in the image linked above, the upper pair of holes apper to be drilled more than 2-inches below the top of t...
by jimh
Wed Apr 07, 2021 9:58 am
Forum: PERFORMANCE
Topic: 1974 Revenge 21 - 2020 Mercury ProXS 200
Replies: 16
Views: 478

Re: 1974 Revenge 21 - 2020 Mercury ProXS 200

Please check the location of the upper engine mounting holes on the transom. In one of the linked images, it looks to me like the upper pair of holes is drilled more than 2-inches below the top of the transom. I am judging that based on the hole spacing of 0.75-inch. There are two empty holes above ...
by jimh
Wed Apr 07, 2021 8:16 am
Forum: The GAM
Topic: Aqua One Bottom Paint
Replies: 4
Views: 336

Re: Aqua One Bottom Paint

In your review of Aqua One anti-fouling paint there is no information about the ability of Aqua One paint to resist formation of marine growth. Please follow up with your observations about how Aqua One performs as an anti-fouling paint, how well it withstands abrasion from just running the boat at ...