Gemini Owners Manual.pub - Gemini Gems
Gemini Owners Manual.pub - Gemini Gems
Gemini Owners Manual.pub - Gemini Gems
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<strong>Gemini</strong> 105Mc Owner’s <strong>Manual</strong><br />
Westerbeke Engine 30B Quick Notes<br />
This addendum is intended as a FAQ (Frequently<br />
Asked Questions) resource for new <strong>Gemini</strong> owner’s.<br />
For complete instructions on maintenance and care<br />
of your new Westerbeke 30B Diesel Engine, please<br />
read the included manual thoroughly.<br />
Breaking in Your Diesel Engine<br />
Although current technology provides the means of<br />
manufacturing engine parts with unimaginable precision,<br />
the manufacturer still falls far short of achieving<br />
the near perfect fit that a proper break-in will provide.<br />
“Break-in,” for the most part, is the allowance<br />
of the machined cylinder and ring surfaces to conform<br />
to each other’s shape during engine operation. This<br />
conforming or “mating” of ring and cylinder surfaces is<br />
the ultimate goal of a proper break-in. “Mating” these<br />
two specific parts will produce a very tight seal in<br />
each cylinder. A tight seal is very important because it<br />
prevents the escape of unburned fuel and pressurized<br />
gasses into the crankcase, while further preventing<br />
crankcase oil from entering the cylinder above the top<br />
compression ring.<br />
1. Start engine and run at fast idle, approximately<br />
1500 RPM, and check the oil pressure. Run the engine<br />
for 30 minutes even though coolant may rise to operating<br />
temperature in a few minutes. If the coolant<br />
should "boil over," stop engine and allow to cool. Then<br />
start again and proceed as above.<br />
2. Start engine again and make a test run, on the water<br />
at 1500 to 2000 rpm’s, and rapidly accelerate to<br />
3500 and decelerate to 1500 rpm's 10 times. Applying<br />
loads to the engine for short periods of time causes<br />
increased ring pressure against the cylinder walls and<br />
helps to seat the rings. This is especially important<br />
because you are "breaking-in" the engine with heavyduty<br />
oils. The rapid deceleration increases vacuum and<br />
gives extra lubrication to the piston and ring assemblies.<br />
3. When you have accumulated 25 to 50 hours of operation,<br />
change the engine oil and filter according to<br />
manufacturer’s recommendations for oil type and filter<br />
number.<br />
4. When required as per your manual, re-torque cylinder<br />
heads and manifolds to engine manufacturer's<br />
specifications in proper sequence. Readjust tappets if<br />
necessary. This job is typically performed by a qualified<br />
mechanic.<br />
Westerbeke Spare Parts Kit<br />
Performance Cruising does resell the Westerbeke<br />
Spare Parts Kit - (A) - please make checks payable to<br />
Performance Cruising for a total of $170.00 The kit<br />
includes:<br />
• Kit A Zinc (2)<br />
• Heat Exchanger Gasket<br />
• Fuel Elements (2)<br />
• Oil Filter<br />
• Belt<br />
• Fuel Hardware Kit<br />
• Impeller and Gasket Kit<br />
Changing The Oil<br />
Westerbeke recommends replacing the oil filter (Part<br />
36918) with only the Westerbeke supplied oil filter.<br />
There is little price difference between the Westerbeke<br />
filter and off-the-shelf filters, but a major difference<br />
in the quality of the filter. For your engine’s<br />
sake, use only the Westerbeke filter.<br />
As for oil, the best choice is a heavy duty SAE 30 single<br />
grade oil for our all around operating conditions in the<br />
mid-Atlantic region. . The oil should be changed after<br />
the initial 50 hour break-in period and every 100 hours<br />
of operation or once a season which ever comes<br />
first. Synthetics oils are acceptable, but should not be<br />
used during the break-in period. Check your manual<br />
for exact instruction on how to replace the oil.<br />
Transmission Fluid<br />
The Westerbeke transmission is filled with the same<br />
SAE 30 single grade oil as used in the engine. There is<br />
approximately 1 quart.<br />
Fuel Filters<br />
Your Westerbeke 30B comes installed with one external<br />
fuel filter and an additional internal fuel filter.<br />
Westerbeke recommends changing the filters annually<br />
except if you have contaminated fuel, in which case<br />
you will need several filters. The external filter is a<br />
Racor Model 120AS. We recommend using a 30 micron<br />
filter for replacement—part #R12P. Additional replacement<br />
filters are part #R12S (2 micron) or R12T (10<br />
micron).<br />
CAUTION: IN THE EVENT OF ENGINE TROUBLE:<br />
If you encounter engine trouble and cannot start the<br />
engine, do not continue attempting to crank the engine<br />
without taking a precaution. Prolonged cranking<br />
Copyright © 2004 Performance Cruising Inc.<br />
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