Evinrude E-TEC 75 / 90 hp service guide

Quick answers

What two-stroke oil does an Evinrude E-TEC 75 / 90 hp use?

Evinrude/Johnson XD100, XD50 or XD30; if not available, an NMMA TC-W3 certified oil. XD100 preferred; use XD100 below 32 °F (0 °C). The EMM can be set to the XD100 oil ratio (about one third less oil); then use only XD100. Oil/fuel ratio is EMM controlled; do not add oil to the fuel. Break-in: EMM gives extra oil for the first two hours above 2000 RPM.

What gear oil does an Evinrude E-TEC 75 / 90 hp use, and how much?

HPF XR Gearcase Lube. If not available, Hi-Vis gearcase lube can be used (long term durability may be affected). No automotive gear lube or engine oil. Quantity: 20 in. (L) models 31.6 fl. oz. (935 ml); 25 in. (X) models 32.8 fl. oz. (970 ml).

What spark plug does an Evinrude E-TEC 75 / 90 hp use?

Champion QC12PEPB (refer to the emission control information label), qty 3. Gap: 0.030 ± 0.003 in. (0.76 mm).

How often should an Evinrude E-TEC 75 / 90 hp be serviced?

The factory schedule lists: Every 300 hours or 3 years. In Hawaiʻi's salt water we do a full yearly service every 200 hours or 1 year, whichever comes first, and a new engine needs its first (break-in) service.

When should the water pump impeller be replaced on an Evinrude E-TEC 75 / 90 hp?

The factory schedule says to inspect it at 300 hours. In Hawaiʻi's warm salt water we replace it every 200 hours or 1 year, whichever comes first, because a worn impeller is the most common cause of overheating.

What is the idle speed of an Evinrude E-TEC 75 / 90 hp?

In gear 700 ± 50 RPM; neutral 600 ± 50 RPM. Full throttle range 4500 to 5500 RPM.

What is the propeller nut torque on an Evinrude E-TEC 75 / 90 hp?

With keeper 70 to 80 ft. lbs. (95 to 109 N·m); without keeper 120 to 144 in. lbs. (13.6 to 16.3 N·m), then tighten to line up the cotter pin, do not loosen; new cotter pin. Triple-Guard grease on the prop shaft.

Maintenance specs

Injection oil	Evinrude/Johnson XD100, XD50 or XD30; if not available, an NMMA TC-W3 certified oil. XD100 preferred; use XD100 below 32 °F (0 °C). The EMM can be set to the XD100 oil ratio (about one third less oil); then use only XD100. Oil/fuel ratio is EMM controlled; do not add oil to the fuel. Break-in: EMM gives extra oil for the first two hours above 2000 RPM
Gearcase lubricant	HPF XR Gearcase Lube. If not available, Hi-Vis gearcase lube can be used (long term durability may be affected). No automotive gear lube or engine oil
Gearcase capacity	20 in. (L) models 31.6 fl. oz. (935 ml); 25 in. (X) models 32.8 fl. oz. (970 ml)
Gearcase level and drain/fill plugs	60 to 84 in. lbs. (7 to 9.5 N·m), new seals. Fill slowly through the drain/fill hole until it appears at the level hole
Gearcase leak test (lube drained)	Pressure 3 to 6 psi (21 to 42 kPa); if no leak, raise to 16 to 18 psi (110 to 124 kPa). Then vacuum 3 to 5 in. (76 to 127 mm) Hg; must hold minimum 15 in. (381 mm) Hg
Spark plug	Champion QC12PEPB (refer to the emission control information label), qty 3
Spark plug gap	0.030 ± 0.003 in. (0.76 mm)
Spark plug torque	15 ft. lbs. (20 N·m), then index: if the mark is in the shaded area, go up to 30 ft. lbs. (41 N·m) and no more; if it will not index by then, try another plug. Open side of the ground electrode faces the injector
Idle speed (EMM controlled)	In gear 700 ± 50 RPM; neutral 600 ± 50 RPM. Full throttle range 4500 to 5500 RPM
Thermostat	143 °F (62 °C). Maximum temperature 200 °F (94 °C)
Water pressure	16 psi minimum at 5000 RPM. Flushing: keep water inlet pressure 20 to 40 psi (140 to 275 kPa)
Anodes	Three anodes: stern bracket, propeller shaft bearing housing, gearcase housing. Bearing housing anode screws 108 to 132 in. lbs. (12.2 to 14.9 N·m). Replace at two-thirds eroded.
Propeller nut	With keeper 70 to 80 ft. lbs. (95 to 109 N·m); without keeper 120 to 144 in. lbs. (13.6 to 16.3 N·m), then tighten to line up the cotter pin, do not loosen; new cotter pin. Triple-Guard grease on the prop shaft
Power trim/tilt	Evinrude/Johnson Biodegradable TNT Fluid, single piston system. Capacity 21 fl. oz. oz. Fill plug 45 to 55 in. lbs. (5 to 6 N·m); manual release valve 45 to 55 in. lbs. (5 to 6 N·m). Check fluid every 3 years or 300 hours

Service schedule

The factory maintenance intervals, with what is replaced and what is checked at each. Rows marked Hawaiʻi are our shop's yearly service for salt water use.

1. Every 200 hours or 1 year (our Hawai‘i yearly service) Hawai‘i

   Replace: fuel filter, oil filter, gear case oil, gear case plug gaskets, propeller cotter pin, water pump impeller

   Check: spark plugs, anodes

2. Every 300 hours or 3 years

   Replace: fuel filter, oil filter, gear case oil, gear case plug gaskets, propeller cotter pin, water pump impeller

   Check: spark plugs, anodes

We replace the water pump impeller at every service from 200 hours up, which can be sooner than the factory schedule, because of Hawaiʻi’s warm salt water.

Source: Evinrude E-TEC 75/90 hp service manual. Specs can change by model year and serial number, so always confirm your exact model from the serial tag on the clamp bracket.