DRIVE SHAFTS 8 70237
Tble of Contents Pge Specifictions............................... 8-1 Torque Specifictions..................... 8-1 Specil Tools............................ 8-1 Lubricnts, Selnts, nd Adhesives........ 8-1 Exploded Views............................. 8-2 Drive Shft.............................. 8-2 Bering Support nd Retining Hrdwre... 8-3 Bering Support nd Retining Hrdwre... 8-4 Service Procedures.......................... 8-5 Instlltion............................... 8-5 Replcement Drive Shfts................. 8-7 88-0 - DRIVE - DRIVE SHAFTS SHAFTS 90-806534940
Specifictions Torque Specifictions Description Drive Shft to Bering Support Flnge (MCM Models) Drive Shft to Output Shft (MCM Models) Torque 50 lb. ft. (68 N m) 50 lb. ft. (68 N m) Specil Tools Description Alignment Tool Assembly Prt Number 91-805475A1 Slide Hmmer Puller 91-34569A1 Lubricnts, Selnts, nd Adhesives Description Quicksilver 2-4-C Mrine Lubricnt Quicksilver Engine Coupler Spline Grese Prt Number 92-825407A3 92-816391A4 90-806534940 DRIVE SHAFTS - 8-1
Exploded Views Drive Shft 1 - Flnge 2 - U-Joint 3 - Drive Shft 3 1 1 2 2 73597 8-2 - DRIVE SHAFTS 90-806534940
Exploded View Bering Support nd Retining Hrdwre 1 - Bolts 1/2-20 x 4 In. (102 mm) Long 2 - Steel Wsher (Flt) 3 - Sphericl Wsher (Rounded on One Side) 4 - Bering Support 5 - Sphericl Wsher (Rounded on One Side) 6 - Nut 1/2-20 7 - Trnsom Plte 8 - Bering Support (Tilstock) 7 8 1 3 2 4 5 6 Torque Specifictions 35-40 lb. ft. (47-54 N m) 73518 90-806534940 DRIVE SHAFTS - 8-3
Exploded View Bering Support nd Retining Hrdwre 1 - Snp Ring - Input Shft 2 - Snp Ring - Bll Bering 3 - Bll Bering 4 - Bering Support 5 - Grese Fitting 6 - Oil Sel 7 - Grese Fitting 8 - Input Shft 9 - Plug - Input Shft 1 2 3 5 6 7 8 4 9 73594 8-4 - DRIVE SHAFTS 90-806534940
Service Procedures! WARNING The engine comprtment my contin fuel vpors. Ventilte the engine comprtment to reduce the possibility of fire.! CAUTION Both Attching Bolts MUST BE struck firmly to properly set sphericl wshers. If this procedure is not followed, difficulty in the instlltion of the stern drive my be experienced nd subsequent dmge to input bering my result. Instlltion 71098 Torque bolts to 45 lb. ft. (61 N m) 71401 - Quicksilver Alignment Tool-Insert Alignment Tool Through Gimbl Housing Assembly 71099 - Alignment Tool 90-806534940 DRIVE SHAFTS - 8-5
! CAUTION Drive unit universl joint cross berings MUST run in the sme plne s drive shft u-joint cross berings or severe vibrtion problems will occur. Plce reference mrk on both the universl joint shft nd the input shft to correspond with ech centerline. b c b 50705 - Drive Shft Yoke b - U-joint Cross Bering Centerlines Must Be Verticl 50703 - Bering Support Assembly b - Input Shft c - Reference Mrk Replce the u-joint covers. f c d b e e c d b 70235 - U-joint Shft Splines b - Shft O-rings c - Front Yoke d - Centerline (Centerline Must Run in Sme Plne s Drive Shft Centerline) e - Drive shft Housing Pilot f - Plce Reference Mrk t This Loction 70245 - Top Shield b - Bottom Shield c - Bolt 3/8-16 x 7/8 in. [(22.2 mm) (4 Used)] d - Nut 3/8-16 (4 Used) e - Screws (3 Used - Hidden in This View, Use Loctite 8831) 8-6 - DRIVE SHAFTS 90-806534940
Replcement Drive Shfts Some bot mnufcturers shorten drive shfts. Becuse of this, order replcement drive shfts ccording to the following criteri: Stndrd 58 in. (1473 mm) or 34 1/2 in. (876 mm) shfts cn be ordered from Mercury Mrine. Order modified (shortened) drive shfts from bot mnufcturer. Dn Corportion -Spicer Regionl Drive Shft Centers must modify the shfts to mintin MerCruiser Wrrnty. Modified Drive Shft Specifictions: U-joint ligned rdilly within 0 (±1/2 ). U-joints gresed, fter welding, with Quicksilver 2-4-C Mrine Lubricnt. Assembly blnced to within 1.5 oz. in. (0.01 N m). Tube to hve.005 in. (0.127 mm) to.010 in. (0.254 mm) interference fit with tube yoke. Tube must be stright nd round within.015 in. (0.381 mm).! CAUTION When ttching shft BE SURE tht the pilots on the drive shft flnges re engged in input shft nd output shft flnges. Flnges MUST BE flush with ech other prior to tightening screws or screws my come loose during opertion.! CAUTION Filure to properly lign shft flnges with mtching mrks mde on disssembly my cuse improperly ligned drive unit nd extension drive shft u-joint centerlines resulting in severe vibrtion problem. 90-806534940 DRIVE SHAFTS - 8-7