Yanmar 6LYA-STP
The Power Behind Stella Blue
The Yanmar 370 has been a popular choice for power in the single engine version of this boat. Yanmar has enjoyed a great reputation in auxiluary power in sail boats. We had a 27 year old Yanmar in our last sailboat that just ran great all the time, so we were quite happy that this boat had Yanmar power.
The Yanmar 370 HP is one version of the 6LY family. It is the same engine as the 350 HP 6LYA-STE, just rated differently. The Yanmar engine codes for these engines goes like this:
|
6 |
LY |
A |
ST |
E or P |
|
No. of cylinders |
family of engines |
final assembly in America |
Super Turbocharged |
Export or Pleasure rated |
The engine code information came from Yanmarhelp.com. This a great site with lots of useful information
Yanmar 370 Specs
| Model | 6LYA-STP | |
| Configuration | 4-stroke, vertical, water cooled diesel engine | |
| Number of cylinders | 6 in-line | |
| Bore x Stroke | mm (in.) | 100 X 110(3.94 X 4.33) |
| Displacement | lit. (cu. in.) | 5.184(316) |
| Continuous rating output at crankshaft | kW/rpm (hp/rpm) | 213/3100 (290/3100) |
| Maximum output at crankshaft | kW/rpm (hp/rpm) | 272/3300 (370/3300) |
| Combustion system | Direct injection | |
| Aspiration | Turbocharged with intercooler | |
| Starting System | Electric starting (D.C. 12V, 2.5kW starting motor/12V, 80A alternator) | |
| Cooling System | Fresh water cooling by centrifugal fresh water pump and rubber impeller seawater pump | |
| Rotation of Crankshaft | Counterclockwise viewed from stern | |
| Dry Weight | kg (lbs) | 510 (1124) |
| Atmospheric conditions= ISO 3046/1, Density of fuel= 0.86g/cm3, 1hp=0.7355kW | ||
View the complete Yanmar 6LYA-STP spec sheet
| Marine Gear | |
| Model | ZF 80-A |
| Ratio | A 2.5 B 2.5 |
| P/N | 3313001005 |
| S/N | 42436L |
Yanmar Test Data
The following data was published on the Mainship Website as data collected by the "major engine suppliers during real world boat tests of mainship yachts." This information is not any guarantee of any performance but is interesting to look at.
Keep in mind, these tests were done on a lightly loaded boat with brand new (read-very clean hull)
40 Trawler with Single Yanmar 6LYA-STP/370 HP
|
RPM |
MPH |
KNOTS |
GPH |
MPG/Statute |
Range/Statute |
|
1000 |
4.8 |
4.2 |
Not Measured |
Not Measured |
Not Measured |
|
1500 |
7.7 |
6.7 |
3.1 |
2.5 |
670.6 |
|
2000 |
9.5 |
8.3 |
5.0 |
1.9 |
513.0 |
|
2500 |
10.9 |
9.5 |
8.5 |
1.3 |
346.2 |
|
3000 |
14.9 |
13.0 |
13.7 |
1.1 |
293.6 |
|
3500 |
19.2 |
16.7 |
19.5 |
1.0 |
265.8 |
Test date 4/26/05. Range based on 90% fuel capacity. Boat load included 150 gal gas, 130 gal water, 2 people with gear.