SeaStar steering dimensions Helms: BayStar SeaStar & SeaStar PRO Front Mount SeaStar Rear Mount FILLER PORT 4-7/16" (113mm) 3/4" STANDARD TAPER 4-7/16" (113mm) 5/8" UNF THREAD WOODRUFF KEY 5-7/8" (149mm) 3-7/8" (98mm) 1-3/4" (45mm) 1-7/8" (48mm) DASH 2-5/8" (67mm) 2-5/8" (67mm) 3" Dia. (76mm) 1/4" NPT PORTS (4) Hynautic Rear Mount HELM DIMENSIONS SHAFT HELM MODEL/ (INCHES) KEY SERIES PART NO. A B C TYPE H-20 H-21 6.125 10.75 3.5 1/4 square H-25 5.5 10.125 3.5 #9 Woodruff H-26 5.5 10.125 3.5 #9 Woodruff H-40 H-41 6.125 13.625 5.125 1/4 square H-41-02 5.5 13.0 5.125 #9 Woodruff H-41 6.125 13.625 5.125 1/4 square H-42-02 5.5 13.0 5.125 #9 Woodruff Capilano 3/8" DIA.(9.5mm) MOUNTING HOLES 30 DEG. 3/8" NPT 3/8" NPT (DELIVERY LINE) 3/4" STANDARD TAPER WOODRUFF KEY 3-3/8" (86mm) 5/8" UNF THREAD 3-3/8" (86mm) 2-1/4" (57mm) 3/4" DIA. ADJUSTING 3/8" NPT (COMPENSATING LINE) 5-7/8" (149mm) KNOB 4-3/4" (121mm) 5" (127mm) 6-5/8" (168mm) 5-1/2" (140mm) 11-5/8" (295mm) 160
dimension information: hydraulic steering helms Performance Tilt: Traditional Tilt: 48 4.87 TO BOOT FACE 6.54 TO SHAFT TIP TILT HELM PRO TRU SION BEHIND DASH (minus dash thick ness): APPROX. 7 MAXIMUM STEERING WHEEL DIAMETER: 20" 5.00 SeaStar Helm Mounting Options: (for SeaStar front mount helms only) 4.75 DIA. Round Bezel Kit HA5417 3.00 DIA. CUT-OUT BEZEL FOOTPRINT 30 18 FILLER PORT 4.92 TO BEZEL FACE 6.79 TO SHAFT TIP 3/4" STANDARD TAPER 5/8" UNF THREAD WOODRUFF KEY 6.81" FILLER PORT 3-3/4" (93mm) 5.28 BEZEL FOOTPRINT DASH 4" (102mm) 5.15 WIDE TILT HELM PRO TRU SION BEHIND DASH (minus dash thick ness): APPROX. 7 MAXIMUM STEERING WHEEL DIAMETER: 20" CUSTOMER- SUPPLIED SPACERS Square Backplate kit HA5418 Required when retrofitting SeaStar front mount helms into dashboard holes from the following steering systems: Telefl ex Mechancial steering: Big-T, Safe-T and most other rotary. Telefl ex Hydraulic steering: SyTen Hynautic Hydraulic steering helms: H-50, H60, H-80, H-300. Dash 20 Wedge Kit HA5419 WOODRUFF KEY 3/4" STANDARD TAPER 5/8" UNF THREAD FILLER PORT (For this con fig u ra tion, use Drain Kit HA5408) 5-7/8" (149mm) MINUS DASH THICKNESS 7-3/4" (195mm) DASH 161
SeaStar steering dimensions Outboard BayStar (HC4645, HC4647, HC4648, HC4658) SeaStar Pivot Mount (includes PRO & Tournament) (HC5345 shown) SeaStar Side Mount (HC5370) 1-3/4" (38mm) BLEED SCREW 21-3/4" (544 mm) LINK ARM SUPPLIED BY ENGINE MANUFACTURER 1-5/16" (33.3mm) ACROSS WRENCH FLATS RETRACTION 2-5/8" (67 mm) 1-1/2" (38mm) 3/8" COMPRESSION FITTING FOR HOSE CONNECTION 9/16"-24 UNEF THREAD 13" (330mm) 1-11/16" (44mm) INTEGRAL BLEEDER FITTING LINK ARM SUPPLIED BY ENGINE MANUFACTURER 3/4" (19mm) AT FULL RETRACTION 4-7/8" (124 mm) 9" (228mm) AT FULL EXTENSION SeaStar Splashwell Mount (HC5380) TRANSOM 4" (102mm) 1-1/2" (38mm) 21-5/8" (550mm) SeaStar Catamaran/ Pontoon (HC5343 & HC5374) HC5374 HC5343 162
dimension information: hydraulic steering cylinders Stern Drive (I/O) Internal Mount P/N HC5314 (MODEL BA150-7ATM) Marine Drive Systems Series 1000 Volvo 275 (Non Power Assisted TO DATE) P/N HC5326 (MODEL BA150-7EM) MerCruiser ALPHA I; MerCruiser BRAVO I & II (Non Power Assisted, 1984-DATE) OMC King Cobra (Non Power Assisted; 1986-DATE) P/N HC5328 (MODEL 125-8EM) BMW All Models (Power Assisted, TO DATE) MerCruiser MERCRUISER I (Power Assisted TO 1983) MerCruiser ALPHA I; MerCruiser BRAVO I & II Power Assisted (1984-DATE) OMC King Cobra (Power Assisted 1986-DATE) Volvo 280, 290 (Power Assisted TO DATE) Yamaha All Models (Power As sist ed 1989-DATE) P/N HC5329 (MODEL 125-8VEM) Volvo Diesel (Power Assisted, TO DATE) 163
SeaStar steering dimensions Stern Drive (I/O): Internal Mount P/N HC5330 (MODEL BA125-8EMV) BMW All Models MerCruiser, MerCruiser I (Non Power Assisted, TO 1983) Volvo 280, 290 & Volvo Diesel P/N HC5331 (MODEL 92-VPS) Volvo All Models (Power Assisted, 1992) P/N HC5332 (MODEL 135-7EM) Mercruiser Alpha 1; Mercruiser Bravo I, II, III Volvo 280, 290, Diesel NOTE: If engine outdrive is not equipped with a torque tab on the underside of the lower leg, one must be installed to reduce prop torque. Heavy Duty External Mount (Hynautic K-5 cylinder) 164
dimension information: hydraulic steering cylinders Inboard - Manual Aluminum DIMENSIONS ATM (ALUMINUM BODY) INBOARD CYL IN DERS P/N HC5312/HC5313/HC5314 (MODEL BA1-7ATM): MOUNTING CONFIGURATION DIMENSIONS ATM (ALUMINUM BODY) INBOARD CYL IN DERS P/N HC5312/HC5313/HC5314 (MODEL BA1-7ATM): CYLINDER DIMENSIONS SPECIFIC TO MODEL CYLINDER PART BODY SHAFT MODEL # DIAMETER DIAMETER BA125-7ATM HC5312 1.38" (35mm) 0.50" (12.7mm) BA135-7ATM HC5313 1.50" (38mm) 0.625" (15.9mm) BA150-7ATM HC5314 1.75" (45mm) 0.625" (15.9mm) CYLINDER PART MOUNTING DIMENSIONS MODEL # A B C BA125-7ATM HC5312 20" (508) 6.5" (165) 8.5" (216) BA135-7ATM HC5313 20" (508) 6.5" (165) 8.5" (216) BA150-7ATM HC5314 20" (508) 6.5" (165) 8.5" (216) (Figures in parenthesis are in millimeters) BALL JOINT MOUNT CYLINDERS (K-18/K-19) CYL DIMENSIONS MODEL A B C D BORE STROKE DISP K-18 24.5" (662) 9.31" (237) 11.75" (299) 9.875" (251) 1.25" (32) 7" (178) 6.4 (105.6) K-19 28.5" (724) 11.31" (287) 13.75" (350) 11.875" (302) 1.25" (32) 9" (229) 8.3 (135.7) 165
SeaStar steering dimensions Inboard - Manual Brass - SeaStar DIMENSIONS TM (BRASS BODY) INBOARD CYLINDERS P/N HC5318/HC5369/HC5319 (MODEL BA1-7TM): CYLINDER DIMENSIONS SPECIFIC TO MODEL CYLINDER PART BODY SHAFT MODEL # DIAMETER DIAMETER BA150-7TM HC5318 1.75" (45mm) 0.625" (15.9mm) BA150-9TM HC5369 1.75" (45mm) 0.625" (15.9mm) BA175-7TM HC5319 2.00" (51mm) 0.75" (19.0mm) MOUNTING CONFIGURATION DIMENSIONS TM (BRASS BODY) INBOARD CYLINDERS P/N HC5318/HC5369/HC5319 (MODEL BA1-7TM): CYLINDER PART MOUNTING DIMENSIONS MODEL # A B C BA150-7TM HC5318 21" (534) 8" (204) 10" (254) BA175-7TM HC5319 21" (534) 8" (204) 10" (254) BA150-9TM HC5369 21" (534) 8" (204) 10" (254) (Figures in parenthesis are in millimeters) 166
dimension information: hydraulic steering cylinders Inboard - Manual Brass - Capilano DIMENSIONS & MOUNTING CON FIG U RA TIONS CAPILANO (BRASS BODY) INBOARD CYLINDERS BALANCED 7 STROKE MODELS P/N s HC5349/HC5350/HC5351/HC5355/HC5356/HC5357 (MODEL BA -7TM_): TYPICAL CYLINDER STROKE ARC: 35deg. 35deg. 4-1/2" (114mm) 6" (152mm) 4-1/2" (114mm) 6" (152mm) 4-3/4" (120mm) 21" (533mm) 4-3/4" (120mm) 21" (533mm) 34" (860mm) 34" (860mm) 1-9/16" (40mm) 4" (101mm) 1-9/16" (40mm) 4" (101mm) DIMENSIONS & MOUNTING CON FIG U RA TIONS CAPILANO (BRASS BODY) INBOARD CYLINDERS BALANCED 11 STROKE MODELS P/N s HC5378/HC5379 (MODEL BA -11TM_): 23" (584mm) 38" (965mm) 9" (228mm) CYLINDER MOUNTING FOOT DETAIL - ALL 7" STROKE MOD ELS CYLINDER ROD END CLEVIS DI MEN SIONS 1-3/4" (44mm) 5" (127mm) 5/18-18 NF THREADED HOLE 1-3/4" (44.5mm) 5/8" (16mm) 3-1/8" (79mm) 167
SeaStar steering dimensions Inboard - Manual Brass - Hynautic UNIVERSAL MOUNT MODELS: P/N K-8/K-9 CYL DIMENSIONS SAE (metric) MODEL A* B* C* BORE STROKE DISPLACEMENT K-8 19.74" (502mm) 24.47" (622mm) 27.92" (710mm) 2.5" (64mm) 9.5" (241mm) 39.2 ci (641.9 cc) K-9 24.74" (629mm) 31.99" (813mm) 37.92" (350mm) 2.5" (64mm) 14.5" (368mm) 59.8 ci (979.8 cc) * Clevis option increases length by.44" (12mm) UNIVERSAL MOUNT MODEL: P/N K-5-B (SEE STERN DRIVE CYLINDERS, ON PREVIOUS PAGES) FIXED MOUNT MODELS: P/N K-22/K-27 CYL DIMENSIONS SAE (metric) MODEL A B BORE STROKE DISPLACEMENT K-22 *34.12" (876mm) 13.25" (337mm) 1.5" (38mm) 10" (254mm) 13.3 ci (217.2 cc) K-27 *36.75" (934mm) 13.25" (337mm) 1.5" (38mm) 10" (254mm) 13.3 ci (217.2 cc) * Dimensions are with the cylinder rod centered PIVOT MOUNT MODEL: P/N K-31 CYL DIMENSIONS SAE (metric) MODEL A B BORE STROKE DISPLACEMENT K-31 *38.37" (975mm) 14.12" (359mm) 2.0" (51mm) 10" (254mm) 25.4 ci (416.3 cc)* Dimensions are with the cylinder rod centered 168