Models · Grady-White
Grady-White 336 Canyon
DemoCenter Console · 33–34 ft · 700–1200 hp triples/twins · advanced skipper · typically not trailered
Serious offshore CC; survey tower and multi-engine carefully.
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Where the joy lives
Serious offshore CC; survey tower and multi-engine carefully. Great days are early starts to fishable water with dry rides home; burden shows up when twins, towers, and electronics outpace your maintenance rhythm.
- offshore fishing
- canyon runs
- overnight capable day boat
Watch-outs
Honest watch-outs — so more days feel like why.
- bottom-paint
- electronics-heavy
- tow-vehicle-3/4-ton
- twins-fuel
Common watch-outs
- Gelcoat stress cracks at console and gunwale corners from hard offshore use
- T-top / hardtop leak paths into console electronics
- Livewell pump failures and plumbing odors
- Saltwater corrosion at battery switches, breakers, and ground buses
- Outboard rigging tube chafe and poorly supported hydraulic steering lines
- Non-skid wear and leaking deck hardware bedding
Safety notes
- Wear life jackets; offshore days need VHF, EPIRB/PLB, and a float plan.
- Brief crew on man-overboard and kill-switch lanyard use before leaving the inlet.
Crew (approx)
Day 10
Draft (approx ft)
1.8–4.2
Used band (demo)
$34,895–$223,333
Costs — yearly care snapshot
Demo estimateEducational snapshot so surprise spend doesn't steal boat days — not a quote, not the reason you're here.
Educational demo estimate from center-console · ~34 ft · outboard. Assumes 50 engine-hours/yr, wet-slip, coastal, 5-year hold. Boat day proxy = engine-hours ÷ 4. Not a quote, appraisal, or underwriting offer. Expect higher annual engine and anode costs than lake runabouts; T-top canvas, electronics, and bottom paint (if kept wet) dominate. Twin-outboard models roughly double deferred en
Annual mid
$24,338
5-yr total mid
$157,842
$/good day hint
$2,525
Assumes 50 h/yr · wet-slip · coastal · 5-year hold. Range $17,753 – $32,571/yr.
Maintenance rhythm (clear the deck)
Engine oil and filter change (4-stroke)
~100h / ~12 mo · Follow OEM; sooner in dusty/trailered abuse cycles.
Lower unit / gearcase oil
~100h / ~12 mo · Check for milky oil (water intrusion) every season.
Fuel/water separator service
~100h / ~6 mo · Critical in ethanol fuels and humid climates.
Impeller inspection/replacement
~200h / ~24 mo · Replace sooner if overheating or sediment-heavy waters.
Anode inspection
~6 mo · Saltwater owners: check more often; replace at ~50% wasted.
Winterize / fog / flush
~12 mo · Freeze-belt mandatory; flush after every salt outing.
Boat Day survey intel
Educational overlayAdditive survey priors from the Boat Day failure corpus — not a marine survey. Prefer a credentialed surveyor before purchase.
- deck-core
- salt
- electrical
Extra common issues
- Console core soft
- T-top fastener corrosion
- Battery wiring in wet bilge
Survey focus
- Console/windshield leaks
- Outboard gearcases
- Bonding/anodes
Campaign / bulletin diligence
- Educational: Salt CC focus — anodes, outboards, windshield/console leaks, and trailer brakes.
- Educational: salt CC buyers should budget anodes, lower-unit service, and trailer brakes annually.
Top findings for center-console
- Console core soft / leak paths at windshieldhigh · high
- Battery switch / house bank wiring corrosionhigh · medium
- Outboard lower-unit water intrusionmedium · high
- T-top / hardtop fastener corrosion into deckmedium · medium
- Livewell and fishbox drain odors (core wet)medium · high
Corpus: /api/v1/datasets/survey-failures · Pre-purchase checklist · Find them online · surveyors
Cost & survey cues
Expect higher annual engine and anode costs than lake runabouts; T-top canvas, electronics, and bottom paint (if kept wet) dominate. Twin-outboard models roughly double deferred engine risk. Serious offshore CC; survey tower and multi-engine carefully.
Survey focus
- Hull-to-deck joint and stringer tabbing integrity
- Console core moisture and T-top mount structure
- Outboard compression, leakdown, and lower-unit condition
- Fuel system hoses, tanks, and EPA vents
- Electrical bonding, battery switches, and bilge pumps
- Thru-hulls, seacocks, and livewell plumbing
Comparables
Waterways: long-island-soundchesapeakesw-florida
Clear next steps
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Specs, years, and HP ranges are approximate educational demo data — not OEM specifications. Verify with manufacturer literature, a qualified marine surveyor, and current listings before purchase or service decisions.