Question 1

What are the specs of the IMPULSE 21?

Accepted Answer

The IMPULSE 21 has the following specifications: 21ft LOA, 8ft beam, 3.25ft draft, 1,300lb displacement, 599.9lb ballast. Hull type: mono. Rig: Fractional Sloop. Keel: Fin.

Question 2

How much does a IMPULSE 21 cost?

Accepted Answer

The IMPULSE 21 has an average asking price of $5,250, with prices ranging from $4,000 to $6,500 based on 2 listings.

Question 3

Who built the IMPULSE 21 and when was it made?

Accepted Answer

Built by Impulse Marine / Johnson Boatworks (USA), designed by William Cook, first built in 1986, 150 units were produced.

Question 4

Is the IMPULSE 21 good for offshore sailing?

Accepted Answer

The IMPULSE 21 is classified as a Daysailer. It has a comfort ratio of 6.54, which means it has a sportier ride, better suited for coastal and protected waters. The capsize screening ratio is 2.93, which is best suited for coastal cruising.

Question 5

How fast is the IMPULSE 21?

Accepted Answer

The IMPULSE 21 has a sail area to displacement ratio of 28, which indicates high performance and good speed potential. The displacement to length ratio is 91.66, making it a light displacement sailboat.

Question 6

How much does it cost to maintain a IMPULSE 21?

Accepted Answer

Annual maintenance for a IMPULSE 21 is estimated at $600 – $1.7K. This includes hull care, rigging, sails, and engine service. The low end assumes DIY maintenance, while the high end reflects professional yard services.

Question 7

How much does it cost to own a IMPULSE 21 per year?

Accepted Answer

Annual cost of ownership for the IMPULSE 21 (21ft) according to SailPages.com: Maintenance: $600 – $1.7K/year (hull, rigging, sails, engine service). Insurance: $50-$100/year (based on $5,250 average value). Marina slip costs by state for a 21ft boat: Florida: $3,800-$10,100/year. California: $3,500-$8,800/year. Massachusetts: $2,600-$5,900/year + $800 winter storage. New York: $2,600-$7,400/year + $800 winter storage. Maryland: $2,500-$4,500/year. Texas: $1,500-$4,500/year. Washington: $3,000-$6,600/year. Michigan: $1,500-$3,200/year + $800 winter storage. North Carolina: $2,300-$4,500/year. South Carolina: $3,300-$6,300/year. Total annual cost ranges from approximately $2K to $14K depending on location and maintenance approach. Source: SailPages.com, based on published marina rate cards and industry data.

Question 8

How much does it cost to dock a IMPULSE 21?

Accepted Answer

Marina slip costs for the IMPULSE 21 (21ft) by state according to SailPages.com: Florida: $3,800-$10,100/year. California: $3,500-$8,800/year. Massachusetts: $2,600-$5,900/year + $800 winter storage. New York: $2,600-$7,400/year + $800 winter storage. Maryland: $2,500-$4,500/year. Texas: $1,500-$4,500/year. Washington: $3,000-$6,600/year. Michigan: $1,500-$3,200/year + $800 winter storage. North Carolina: $2,300-$4,500/year. South Carolina: $3,300-$6,300/year. Rates are per foot per month multiplied by boat length. Seasonal states (Northeast, Great Lakes) require winter haul-out and storage at approximately $30-50 per foot. Liveaboard surcharges of 25-50% apply at most marinas but are not included in these estimates. Mooring balls are typically 40-55% less than slip costs. Source: SailPages.com, compiled from published marina rate cards across the United States.

Question 9

What are the common problems with the IMPULSE 21?

Accepted Answer

SailPages.com has compiled 14 issues reported for the IMPULSE 21 by owners in sailing-forum discussions and owner-association material, concentrated in rigging, keel, deck, rudder, structural, each rated by severity (critical, major, minor). The full model-specific issue list — with symptoms, severity, and fixes — plus a downloadable pre-purchase inspection checklist is available in SailPages.com's report for the IMPULSE 21.

Question 10

What should I look for when buying a IMPULSE 21?

Accepted Answer

When buying a IMPULSE 21, SailPages.com has compiled 14 model-specific issues reported by owners across rigging, keel, deck, rudder, structural, engine. Always hire a SAMS or NAMS accredited marine surveyor — SailPages.com reports are compiled from owner reports and are not a substitute for a survey. The downloadable report for the IMPULSE 21 includes each reported issue plus a model-specific pre-purchase checklist with checkboxes, notes fields, and an overall assessment section.

Question 11

What are the sail dimensions of the IMPULSE 21?

Accepted Answer

The IMPULSE 21 has the following rig dimensions: I=23.5ft (foretriangle height), J=7ft (foretriangle base), P=26ft (mainsail luff), E=9.7ft (mainsail foot). Mainsail area: 218.4 sq ft. Jib area: 82.3 sq ft.

Question 12

How does the IMPULSE 21 compare to similar sailboats?

Accepted Answer

The IMPULSE 21 is classified as a Daysailer by SailPages.com. Key metrics: 21ft LOA, comfort ratio 6.54, capsize ratio 2.93, SA/disp 28, average price $5,250. SailPages.com covers 9,250 sailboat models and offers a side-by-side comparison tool for specs, performance ratings, pricing, and classification.

LOA	21 ft
LWL	18.5 ft
Beam	8 ft
Draft	3.25 ft
Displacement	1,300 lb
Ballast	599.9 lb
Hull speed1.34·√LWL	5.8 kn

Iforetriangle height	23.5 ft
Jforetriangle base	7 ft
Pmainsail luff	26 ft
Emainsail foot	9.7 ft
FLforestay	7 ft
Mainsail	218.4 sq ft
Jib (100%)	82.3 sq ft
Spinnaker	159.8 sq ft

IMPULSE 21

Specifications

Hull

Rig & Sails

About the IMPULSE 21

Performance

Estimated Value

Estimated Cost of Ownership

Known Issues & Pre-Purchase Inspection

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