/ / 1971 Donzi GT 21 502 Gen VI Arneson #6 surface drive

1971 Donzi GT 21 502 Gen VI Arneson #6 surface drive

  • Price: Contact seller
  • Make: Donzi
  • Location: Saint Petersburg, Florida, United States


1971 Donzi GT 21, GM 502 Gen VI BBC with fresh water cooling and Arneson #6 surface drive with "Bravo conversion" package. Fully restored top to bottom. Partially re-assembled.This is an almost completed project that includes just about everything but a propeller. I've owned this vessel for the last 30+ years. Free and clear title in hand. 1971 Donzi GT 21 -Hull bottom reinforced internally with additional layers of fiberglass, outside stringer gussets, new bulk heads and partial new stringers, plus additional layers of glass wrapped on original stringers. -New gel coat on hull bottom, sides and top deck. Hull painted inside with white bilge paint. All voids foam filled for added rigidity. Hull and deck were separated and both flipped upside down to complete all restoration work. -New deck coring anywhere the original core was originally compromised. -All work completed by a professional fiberglass technician who leads the warranty repair department for a major boat manufacturer. -Just under $10,000 was the tab for the hull restoration. Every inch of the hull and top deck were resurfaced and or coredinside and out. There are no original surfaces left. There are no soft spots or any compromised areas. Hull and deck shine like new. 502 c.i. Chevrolet GenerationVI block & steel factory GM crank & rods (All other internals are NEW) ONE hour break in time before I installed the engine. -World Products iron Merlin marine heads (Inconel/stainless) -Competition Cams 308 full hydraulic roller cam shaft & roller lifters -Comp Cams aluminum roller rockers -Forged pistons with static compression ratio of 10:1 (compatible with93 octanepump gas) -Mercruiser Thunderbolt 4 ignition system -Forged aluminum serpentine pulley set from Mercruiser HP 500 -Stainless Marine Aluminum exhaust manifolds with water jacketed dry Stainless Marine tail pipes -We ran ONE gallon of fuel through the engine on a test stand prior to installation in vessel. That's the only time on the motor. -Engine is FRESH WATER COOLED with a custom hi-horsepower heat exchanger. -1 external power steering cooler -1 external HP 500 engine oil cooler -1 external transmission cooler -New Merlin aluminum intake -Holley 980 marine carburator modified and documented by Dean Nickerson Performance. -New flywheel, harmonic balancer and circulating pump -2 sets of aluminum valve covers. One blue Holley set and one polished set of hi-rise aluminum marine covers compatible wit the S.M. exhaust. -Gil offshore solid plate style engine mounts Arneson # 6 surface drive -Arneson-Industries custom aluminum extension box -Custom fiberglass wedge installed for correct drive angle/height -External stainless steel hydraulic trim and steering cylinders -Surface drive is geared internally, not chain driven. Prop shaft spins opposite of engine rotation. -Re-built Borg Warner 72C hydraulic transmission. Fresh, notime on this unit. Fill with oil and go. Miscellaneous -NEW factory front Donzi Marine driver and passenger bucket seats -Rear bench seat and coaming pads included but will need some love. I planned on fabricating new seats, but... -All original deck hardware. Most will need re-chroming. Yes,the screens for the front engine room scoops are included :) -Original Bennett trim tabs and pump. Spare set of actuators. -Original steering wheel and custom MOMO. Both with correct adapters to fit the Char-Lynn hydraulic helm. -Original wiring harness included (you wont need it though) -New wiring harness form Mercruiser HP 500 is in vessel -NEW full set of Livorsi marine gauges -Fuel level -Volts -Oil temp -Water temp -Trim gauge -Water psi engine -Oil pressure -Tachometer -Liquid filled speedo
Call me at 727 458 9721 for additional details. The boat is pretty much perfect as pictured, just some assembly required. Stored indoors, fully covered. No surprises. Reluctantly selling just because my interests have changed over the years. I offshore fish now with no time to complete the restoration. Call or text 727 458 9721
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