Suzuki outboard motors 1988 2003 repair manual., Page 375Get this manual
12-2 SUPPLEMENT Most of the data and practically all the procedures contained within the original manuscript are current and applicable to engines and models as indicatedHowever, engineering updates and additions to the product line has resulted in minor changes to some data and modification of few proceduresIt appears that the largest single impact of this manufacturing progress was the addition of the DT5Y Series in 1999While the similarities of the DT2DT2.2 are well known and the procedures clearly documented and completely interchangeable; this doesn't always apply in the discussions of engines that are larger and newerThe following data will discuss noted dissimilarity within specific family groupingsThe DT4 and the DT5Y are similar enough for treatment as an "engine family The significant differences discussed next will be followed by discussions of minor dissimilarity in other engine groups in general chronological orderMany of the differences are related to both the fuel and ignition componentsThe details of these differences are listed in the supplemental data of this Section as Carburetor and Ignition SpecificationsPiston pinPiston ring set
Lower crankshaft ��
Upper crankshaftFig1 Along with the larger cylinder bore, items indicated by name in the illustration have been changed on the DT5Y
There are four main differences between the DT4 and the DT5Y These are as follows Displacement was increased to 109 cubic centimeters using larger cylinder bore Minor differences in the cylindercylinder head design were incorporated along with change in nomenclature from Cylinder Head Cover to Cylinder Head There are minor changes to the Carburetor Assembly Due to the addition of Neutral Start Interlock (NSI) system, recoil starter assembly is changed With the exception of these differences, all procedures listed for the DT4 also apply to the DT5Y