Johnson / Evinrude 90° cross-flow V4, 85 / 88 / 90 / 100 / 112 SPL / 115 hp and 65 / 80 Jet (1632 cc, 1992-1998) service guide

Quick answers

What two-stroke oil does a Johnson / Evinrude 90° cross-flow V4, 85 / 88 / 90 / 100 / 112 SPL / 115 hp and 65 / 80 Jet use?

NMMA certified TC-W3 or equivalent two-stroke lubricant; the manufacturer recommends Evinrude/Johnson brand oil. Never use automotive motor oil.

What is the fuel to oil ratio for a Johnson / Evinrude 90° cross-flow V4, 85 / 88 / 90 / 100 / 112 SPL / 115 hp and 65 / 80 Jet?

50:1 for normal operating conditions, from the VRO2 system where fitted, or pre-mixed in the tank on engines without VRO2. Break-in (first 20 hours of operation): 25:1; an engine with VRO2 runs a tank of 50:1 pre-mix in addition to the VRO2 output to get 25:1, and the tank oil level must be seen to drop before going back to untreated gasoline. Severe or high performance use: 25:1 on most carbureted outboards (50:1 in the tank plus the oiling system).

What gear oil does a Johnson / Evinrude 90° cross-flow V4, 85 / 88 / 90 / 100 / 112 SPL / 115 hp and 65 / 80 Jet use, and how much?

Evinrude/Johnson Ultra-HPF or an equivalent high quality marine gearcase lubricant that meets GL5; Evinrude/Johnson Hi-Vis gearcase lube may be used as a substitute if Ultra-HPF is not available. Quantity: 26 fl oz (800 ml) on the 85, 88, 90, 112 SPL and 115; on the 100 hp 26 fl oz (800 ml) for all except the 100WTL and 100WTX, which take 33 fl oz (980 ml). Not applicable to the 65 Jet and 80 Jet (jet drive).

What spark plug does a Johnson / Evinrude 90° cross-flow V4, 85 / 88 / 90 / 100 / 112 SPL / 115 hp and 65 / 80 Jet use?

Champion, qty 4. 65 Jet, 80 Jet, 85, 88, 90, 112 SPL and 115: 1992-95 QL77JC4 or L77JC4 (QL16V or L16V fixed gap for sustained high speed); 1996 on QL82C. 100 hp: 1992-95 QL16V or L16V fixed gap (QL78V or L78V for sustained high speed), 1996 QL82C, 1997 QL16V fixed gap. Gap: 0.030 in (0.8 mm); the fixed gap plugs (QL16V / L16V, QL78V / L78V) are not gapped.

How often should a Johnson / Evinrude 90° cross-flow V4, 85 / 88 / 90 / 100 / 112 SPL / 115 hp and 65 / 80 Jet be serviced?

The factory schedule lists: First 20 hours; Every 100 hours or 12 months. 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 a Johnson / Evinrude 90° cross-flow V4, 85 / 88 / 90 / 100 / 112 SPL / 115 hp and 65 / 80 Jet?

The factory schedule gives no replacement interval. 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 a Johnson / Evinrude 90° cross-flow V4, 85 / 88 / 90 / 100 / 112 SPL / 115 hp and 65 / 80 Jet?

600 to 700 rpm in gear.

What is the propeller nut torque on a Johnson / Evinrude 90° cross-flow V4, 85 / 88 / 90 / 100 / 112 SPL / 115 hp and 65 / 80 Jet?

Castellated nut (cotter pin through the nut): 120 lb-in (14 N·m). Standard flat nut with a separate keeper: 70 to 80 ft-lb (95 to 108 N·m). New cotter pin every time; tighten further to line up the hole, never loosen.

Maintenance specs

Two-stroke oil	NMMA certified TC-W3 or equivalent two-stroke lubricant; the manufacturer recommends Evinrude/Johnson brand oil. Never use automotive motor oil
Fuel to oil ratio	50:1 for normal operating conditions, from the VRO2 system where fitted, or pre-mixed in the tank on engines without VRO2. Break-in (first 20 hours of operation): 25:1; an engine with VRO2 runs a tank of 50:1 pre-mix in addition to the VRO2 output to get 25:1, and the tank oil level must be seen to drop before going back to untreated gasoline. Severe or high performance use: 25:1 on most carbureted outboards (50:1 in the tank plus the oiling system)
Gear lubricant	Evinrude/Johnson Ultra-HPF or an equivalent high quality marine gearcase lubricant that meets GL5; Evinrude/Johnson Hi-Vis gearcase lube may be used as a substitute if Ultra-HPF is not available
Gear lubricant quantity	26 fl oz (800 ml) on the 85, 88, 90, 112 SPL and 115; on the 100 hp 26 fl oz (800 ml) for all except the 100WTL and 100WTX, which take 33 fl oz (980 ml). Not applicable to the 65 Jet and 80 Jet (jet drive)
Gear oil drain/fill and vent/level plugs	Drain/fill plug at the bottom of the gearcase and vent/level plug on top, 2 plugs. Loosen the vent/level plug first, never remove either plug when the lower unit is hot. Use new gaskets (washers); install the level/vent plug first, then the drain/fill plug.
Gearcase pressure and vacuum test	At the oil level plug hole on top: 3 to 6 psi (21 to 42 kPa) must hold steady; then 3 to 5 in. Hg (76 to 127 mm Hg) of vacuum must hold, then 15 in. Hg (381 mm Hg) must hold
Spark plug	Champion, qty 4. 65 Jet, 80 Jet, 85, 88, 90, 112 SPL and 115: 1992-95 QL77JC4 or L77JC4 (QL16V or L16V fixed gap for sustained high speed); 1996 on QL82C. 100 hp: 1992-95 QL16V or L16V fixed gap (QL78V or L78V for sustained high speed), 1996 QL82C, 1997 QL16V fixed gap
Spark plug gap	0.030 in (0.8 mm); the fixed gap plugs (QL16V / L16V, QL78V / L78V) are not gapped
Spark plug torque	Carbureted motors: 18 to 21 ft-lb (24 to 28 N·m), anti-seize on the threads. Without a torque wrench and with a new crush washer: until the washer seats, then 1/4 turn
Idle speed	600 to 700 rpm in gear
Thermostat	Should open by 125 °F (53 °C) and must be fully open by about 136 to 144 °F (58 to 62 °C). At 5000 rpm it must not go above 160 °F (71 °C). On these engines the thermostats and pressure relief valves are in the exhaust housing adapter directly below the powerhead
Fuel filter	Engines without VRO2: a round filter screen under the inlet cover of the fuel pump (single center bolt), cleaned and reused or replaced with new gasket(s). Engines with VRO2: an inline filter between the tank and the pump, a serviceable housing type on some CV4 motors (including the 100WT) or a sealed plastic canister; replace an inline filter at least annually
Anodes	Typically at least 3: one just above the anti-ventilation plate on the lower unit (bolted from underneath), one or two on the transom bracket, and one on the propeller shaft bearing housing inside the gearcase (not a periodic item); some motors also have a powerhead anode. Worn when shrunk to 2/3 or less of the original size. Never paint or wax them.
Propeller nut	Castellated nut (cotter pin through the nut): 120 lb-in (14 N·m). Standard flat nut with a separate keeper: 70 to 80 ft-lb (95 to 108 N·m). New cotter pin every time; tighten further to line up the hole, never loosen.

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. First 20 hours

   Replace: gear case oil, gear case plug gaskets, propeller cotter pin

   Check: spark plugs, fuel filter

2. Every 100 hours or 12 months

   Replace: gear case oil, gear case plug gaskets, propeller cotter pin

   Check: spark plugs, fuel filter, anodes

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

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

   Check: spark plugs, fuel filter, 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: Johnson / Evinrude 65-300 hp V4, V6 and V8 two-strokes, 1992-2001, aftermarket service and repair manual. Specs can change by model year and serial number, so always confirm your exact model from the serial tag on the clamp bracket.