Posts Tagged ‘longblocks’

The model of Mercruiser Engine can be determined by looking at the last letters of the engine code which is stamped in all complete Marine Longblocks by General Motors at the time of assembly. If the serial number and/or model decals are missing, the Marine Engine code will help to determine the specific engine model/vintage. Refer to the drawing below for the engine code location of your Engine.

Information you need from the engine code, example M01187MH. 7=General Motor’s model year in this case 1997, BUT this could also be 1987 or 1977. MH = Type of engine. The 350 cid V8 Mercruiser models 5.7L, 350 Mag Mpi, Black Scorpion Ski, etc.

**GM 6 Cylinder 250 cid (4.1L) – Sterndrive Model (LH rotation), flat lifters

**GM V6 229 cid (3.8L) – Sterndrive Model (LH rotation), flat lifters

GM V6 262 cid (4.3L) with Mechanical Fuel Pump – Sterndrive Models (LH rotation)

**GM V6 262 cid (4.3L) Gen II with Electric Fuel Pump – Sterndrive Models (LH rotation), roller lifters

**GM V6 262 cid (4.3L) Gen+ – Sterndrive Models (LH rotation), roller lifters and rocker arms

Go Directly to the V6 Longblocks in the Store………V6 Marine Longblocks 

PPT is proud to offer you the most thorough and engineering supported technical advice when it comes to re-powering your boat with either new or remanufactured marine longblocks, complete bobtail drop-in motors or MerCruiser Sterndrives. Due to recent changes within the marine industry we suggest reviewing the 4 steps and technical information outlined below. Once you complete reviewing this guideline, we would be happy for the opportunity, and do our best to help you with your project by answering any specific questions that arise.

Don’t make the mistake of purchasing any Original OEM Mercruiser Engine, Transom Assembly, or Sterndrive from a non-authorized Mercury dealer. Your warranty may depend on it! If a warrant-able technical issue arises you want the support of an authorized Mercury Mercruiser dealer working on your behalf. PPT is proud to be a Platinum Level Mercury Mercruiser dealer while also offering more than 20 years designing and patenting products for many of the features and accessories the Mercruiser engines are equipped with. Purchase your Mercruiser engines and Products from the People you Trust!……Read More

STEP #1 – Understanding YOUR BOAT REPOWERING OPTIONS regarding THE NEW 2010 EPA RULES

Beginning in 2010, the EPA began requiring that CERTAIN NEW ENGINES used when repowering boats to be equipped with emissions control, or use of an specific engine model that is excluded from the EPA requirements….Read More

STEP #2 – Understanding the most common BOAT REPOWERING TERMINOLOGY

One of the first and foremost items for Boaters to get a handle on is the terminology that’s used to describe the different available product options. This library is not all inclusive but addresses the most commonly used “Boat Repowering Related” terms…..Read More

STEP #3 – Determining the CONFIGURATION of Your Existing ENGINE & DRIVE

Next you will need to determine or understand whether you have a sterndrive or an inboard configuration model….Read More

STEP #4 – Determining AGE & SERIAL NUMBER of Your Existing ENGINE

This is important in helping to determine what specific product options are available for replacement. In many cases the serial number contains specific information from the manufacturer that will be important when re-powering to make certain you match the model correctly….Read More

MerCruiser Boat Repower Guide (Read More)

BREAK-IN PROCEDURES 

“Break-In” Procedures for 4-cycle MerCruiser Engines

IMPORTANT: The first 20-hours of operation will have a dramatic affect relative to overall engine performance and expected engine life. Proper break-in practices reduce the potential for excessive oil consumption. It also helps to achieve better engine performance levels for a longer period of time.

FIRST 20-HOURS:

1.      Do NOT operate the engine below 1500 rpm for extended periods of time. Shift into gear as soon as possible after starting the engine. Advance the throttle above 1500 rpm if conditions permit safe operation.

2.      Do NOT operate at one continuous speed for extended periods of time. Vary the throttle position every ten to fifteen minutes.

3.      Do NOT exceed ¾ throttle during the first 10 hours of operation. During the next 10 hours you may occasionally operate at full throttle for no more than 5-minutes at a time.

4.      Do NOT operate at full throttle until the engine reaches normal operating temperatures.

5.      Avoid full throttle acceleration from an IDLE speed.

AFTER FIRST 20-HOURS:

To help extend the engine life for the engine, consider the following recommendations.

1.    Install and maintain the correct propeller for the application. Make sure the prop allows the engine to operate at (or near) the top of its specified Wide-Open-Throttle rpm range. Refer to the Owner’s Manual, or consult with your marine dealer to determine the correct prop for the application.

2.    Refrain from extended periods of Wide-Open-Throttle. We recommend cruising at ¾ throttle or below for longer term operation.

3.    Change the oil and filter regularly. Refer to Specifications and Maintenance section of the MerCruiser Owners Guide for recommendations