Tides Marine SureSeal Twin Injection Propeller Shaft Seals

ID 1350840

$ 801.55

1-2 weeks delivery time

Shaft Diameter:

Stern Tube Diameter:

The Tides Marine SureSeal Twin Injection Propeller Shaft Seal is a drip-free, self-aligning shaft seal kit designed for twin-engine vessels, featuring dual water injection fittings to support a passive crossover line between port and starboard seals. This crossover helps maintain cooling and lubricating water flow to the seal on an idle engine (e.g., trolling or single-engine operation). The SureSeal housing is fiber-reinforced composite with an integral PTFE bearing and a replaceable lip seal accessible via a removable front cap; kits are supplied with an articulating hose and four hose clamps, and can be paired with Spare Seal Carrier Kits to allow lip-seal replacement without uncoupling the shaft.

Description
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Tides Marine SureSeal Twin Injection Propeller Shaft Seal Kits – Metric Sizes (Dual Injection)

The Tides Marine SureSeal™ is a drip-free, self-aligning propeller shaft seal used as OEM equipment on many vessels. This Twin Injection configuration is recommended for twin-engine installations, where the second injection fitting is used to create a passive crossover feed between the port and starboard shaft seals. This helps ensure the SureSeal on an idle engine still receives cooling and lubricating water during trolling or single-engine operation.

Key features

Drip-free, self-aligning shaft seal design
Dual injection fittings for crossover line capability (twin-engine applications)
Fiber-reinforced composite housing — durable and dimensionally stable
Integral PTFE bearing for extended service life
Replaceable lip seal with removable front cap access
Articulating hose helps reduce side loads and simplifies installation

Water supply requirements & important notes

Cooling/lubricating water supply should provide minimum 1 US gallon per minute at idle and approximately 2 psi, increasing with RPM.
Before operating the vessel, test water supply to both SureSeal units.
The SureSeal is not recommended for engines with fewer than 4 cylinders.
Never use grease of any kind.

Selection checklist

Propeller shaft diameter (mm)
Stern tube OD (mm)
Confirm sufficient clean, smooth shaft area where the lip seal will ride
Confirm there is enough distance between stern tube end and coupling for the SureSeal (and add clearance if fitting a Spare Seal Carrier Kit)

Twin Injection – shaft & tube size combinations (metric)

Shaft OD (mm)	Stern Tube OD (mm)
35	51
35	60
35	64
35	67
40	57
40	60
40	64
40	76
45	64
45	70
45	76
45	79
45	89
50	64
50	76
50	79
50	89
55	76
55	89
60	76
60	89
60	95
60	102
60	108
65	89
65	102
65	114
70	89
70	102
70	108
70	114
70	127
75	102
75	108
75	114
80	102
80	114
80	127
80	140
85	114
85	127
85	140
85	152
90	114
90	127
90	140
90	152
95	127
95	140
95	152
100	140
100	152
100	165
105	140
105	152
105	165
110	140
110	152
110	165
110	178
115	152
115	165
115	178
120	152
120	165
120	178
125	165
125	178
130	152
130	165
130	178
140	140
140	165
140	178
150	165
150	178
150	203

Maintenance

Inspect the articulating hose and clamps for damage/corrosion at least annually.
Check injection hoses and fittings for debris; verify steady water flow.
SureSeal assemblies require no winterization; winterization fluids will not harm the SureSeal.

Shaft OD (mm)	Stern Tube OD (mm)
35	51
35	60
35	64
35	67
40	57
40	60
40	64
40	76
45	64
45	70
45	76
45	79
45	89
50	64
50	76
50	79
50	89
55	76
55	89
60	76
60	89
60	95
60	102
60	108
65	89
65	102
65	114
70	89
70	102
70	108
70	114
70	127
75	102
75	108
75	114
80	102
80	114
80	127
80	140
85	114
85	127
85	140
85	152
90	114
90	127
90	140
90	152
95	127
95	140
95	152
100	140
100	152
100	165
105	140
105	152
105	165
110	140
110	152
110	165
110	178
115	152
115	165
115	178
120	152
120	165
120	178
125	165
125	178
130	152
130	165
130	178
140	140
140	165
140	178
150	165
150	178
150	203

Shaft OD (mm)	Stern Tube OD (mm)
35	51
35	60
35	64
35	67
40	57
40	60
40	64
40	76
45	64
45	70
45	76
45	79
45	89
50	64
50	76
50	79
50	89
55	76
55	89
60	76
60	89
60	95
60	102
60	108
65	89
65	102
65	114
70	89
70	102
70	108
70	114
70	127
75	102
75	108
75	114
80	102
80	114
80	127
80	140
85	114
85	127
85	140
85	152
90	114
90	127
90	140
90	152
95	127
95	140
95	152
100	140
100	152
100	165
105	140
105	152
105	165
110	140
110	152
110	165
110	178
115	152
115	165
115	178
120	152
120	165
120	178
125	165
125	178
130	152
130	165
130	178
140	140
140	165
140	178
150	165
150	178
150	203

Shaft OD (mm)	Stern Tube OD (mm)
35	51
35	60
35	64
35	67
40	57
40	60
40	64
40	76
45	64
45	70
45	76
45	79
45	89
50	64
50	76
50	79
50	89
55	76
55	89
60	76
60	89
60	95
60	102
60	108
65	89
65	102
65	114
70	89
70	102
70	108
70	114
70	127
75	102
75	108
75	114
80	102
80	114
80	127
80	140
85	114
85	127
85	140
85	152
90	114
90	127
90	140
90	152
95	127
95	140
95	152
100	140
100	152
100	165
105	140
105	152
105	165
110	140
110	152
110	165
110	178
115	152
115	165
115	178
120	152
120	165
120	178
125	165
125	178
130	152
130	165
130	178
140	140
140	165
140	178
150	165
150	178
150	203