350 Mag Ect, Seacore 350 Mag Ect - Mercury 350 MAG Manual

IMPORTANT: Lubrication requirements for catalyzed engines differ from the requirements for non‑catalyzed engines. Some
marine‑grade lubricants contain high levels of phosphorus, which can damage the catalyst system on MerCruiser engines.
Although these high‑phosphorus lubricants may allow acceptable engine performance, exposure over time will damage the
catalyst. Catalysts damaged by lubricants containing high levels of phosphorus may not be covered by the MerCruiser Limited
Warranty.
If Mercury MerCruiser Full‑Synthetic, 20W‑40 oil is unavailable, use the following lubricants, listed in order of recommendation. If
you are servicing a catalyst engine, use these for short periods of time only.
1. Mercury/Quicksilver 25W‑40 Synthetic Blend, NMMA FC‑W–rated 4‑cycle MerCruiser oil
2. Mercury/Quicksilver 25W‑40, NMMA FC‑W–rated 4‑cycle MerCruiser oil
3. Other recognized brands of NMMA FC‑W–rated 4‑cycle oils
4. A good‑grade, straight‑weight detergent automotive oil according to the last row of the operating chart below.
NOTE: We do not recommend non‑detergent oils, multi‑viscosity oils (other than as specified), non FC‑W–rated synthetic oils,
low‑quality oils, or oils that contain solid additives.

350 MAG ECT, SeaCore 350 MAG ECT

NOTE: Performance specifications are obtained and corrected in accordance with SAE J1228/ISO 8665 Crankshaft Power.
All measurements are taken with the engine at normal operating temperature.
RPM range is measured using an accurate service tachometer with the engine at normal operating temperatures.
Oil pressure must be checked with the engine at normal operating temperature.
NOTE: Oil pressure specifications are for reference and may vary.
IMPORTANT: Do not mix spark plug types in an engine. All spark plugs should have the same part number.
Propshaft power
Displacement
Alternator amperage
RPM
Minimum oil pressure
Thermostat
Timing at idle
90-8M0050539 MAY 2011
eng
Mercury Full-Synthetic MerCruiser Engine Oil, 20W-40, NMMA FC-W rated
MerCruiser/Quicksilver 25W-40 Synthetic Blend, NMMA FC-W rated 4-cycle MerCruiser oil
Mercury/Quicksilver 25W-40, NMMA FC-W rated 4-cycle MerCruiser oil
Other recognized brands of NMMA FC-W rated oils
SAE 20W
0° C
(32° F)
AIR TEMPERATURE
Hot
Cold
WOT
Rev limiter
Idle in neutral
At 2000 RPM
At idle
Seawater‑cooled models
MPI models with Closed Cooling
SAE30W
10° C
(50° F)
Section 4 - Specifications
SAE40W
32878
224 kW (300 hp)
5.7 L (350 cid)
72 A
65 A
4800–5200
5350
550
124 kPa (18 psi)
41 kPa (6 psi)
71° C (160° F)
77° C (170° F)
Not Adjustable
Page 65