FAQs

If you have questions, we have the answers. Check out our FAQ section so you're ready to hit the water.

Don't see your question listed below? Contact us, and we'll help.

How often should maintenance be performed on my Ilmor products?

Service intervals for Ilmor MV10 engines may vary. Please consult the maintenance guide in your owner's manual or contact your authorized service center for more information.

Something on my engine/drive has failed. How do I know if it's covered under warranty?

We recommend you contact your dealer or authorized service center to verify whether your repair is covered under the Ilmor High Performance limited warranty.

What type of fuel should I run with my Ilmor engine?

For US/CAN: 91 (R+M)/2 minimum octane unleaded regular or premium without alcohol. Do not use leaded gasoline.

Non-US/CAN: 98 RON minimum octane major brand of unleaded regular or premium without alcohol.

Please note: If gasoline with alcohol must be used, be sure to periodically inspect the complete fuel system for leaks. Consult your authorized dealer or service center for long-term storage or winterization procedures.

Can I use octane fuel additives?

Ilmor High-Performance does not recommend octane booster for the products we make as we have not tested its compatibility with our engines, nor can we verify the octane rating of the fuel after it is mixed. Please bear in mind that use of any fuel additives that are not recommended by Ilmor may affect your warranty coverage.

What type of oil should I use?

To obtain optimum engine performance and to provide maximum protection, we recommend fully synthetic 15W-50 for the 570HP through 625HP engines, and 0W-40 for 650HP through 725HP engines. The oil filter should always be changed with the engine oil. Please be sure to never mix oils, or any other engine fluids when servicing the engine.

Why do I overfill every time I change the oil, even when following the capacity indicated in the manual?

The owner's manual will detail the approximate capacity of the entire lubrication system. When changing oil, a small amount of oil remains in the oil lines throughout the system, which is why it's difficult to add the indicated amount of oil in the engine without overfilling. You should always add oil when the engine is level. It is important not to overfill or under fill the crankcase. Fill to the correct level by using the indicator marks on the dipstick. Please consult your authorized service center for any additional assistance.

When is the best time to change my engine oil/gear lube?

Ilmor High Performance recommends that owners change the oil and gear lube during regularly scheduled maintenance intervals. We also recommend an oil/gear lube change at the end of the season, prior to winterization or extended storage, to avoid long-term accumulation of contaminants in the system. Consult your owner's manual or your authorized service center for more information.

Which gear lube should I use in my sterndrive?

Consult your owner's manual or contact Ilmor High-Performance or your authorized service center for the recommend gear lube for the “INDY®” Stern Drive. Please note, different gear lubes should never be mixed together. Be sure to drain the unit completely if switching from one type of lube to the other.

How do I winterize my Ilmor High-Performance products?

Because of the complexity of the winterization procedure, we highly recommend you take your Ilmor products to an authorized service center for winter preparation. Additionally, please refer to your owner's manual for additional information. Failure to winterize your engines properly may result in severe engine damage, which will affect your warranty.

How often should I change my sacrificial anodes?

Anodes calcify (a white build-up) which renders them useless, especially if they boat is in and out of the water frequently. The anodes on the Ilmor "INDY®" Stern Drive should be inspected often and replaced when 50% consumed. Calcification can be sanded off if the anodes are still greater than 50% whole. Please note: do not paint anodes as this will render them useless. We suggest you consult your authorized service center for additional information and assistance.

What should I do after running my engine in salt water?

Ilmor Marine engines should be flushed with freshwater after each saltwater use for maximum corrosion protection. A salt neutralizer like Salt-Away® should be used. Also, the engine should be sprayed down with corrosion protector, minimizing the amount of spray on the belts. Consult your dealer or authorized service center for additional information and assistance. 

Why do I have to periodically check my engine alignment and lubricate the engine coupler?

Over time, the engine, transom and sterndrive can become misaligned. To maximize engine coupler life, it is critical that the engine alignment be as accurate as possible. We recommend using approved spline grease for proper lubrication. This is an important maintenance item and should be monitored properly, especially during annual service appointments and if you ever sense/hear an abnormal vibration during operation.

Please note: damage caused by improper alignment or lack of lubrication is not covered under the limited warranty.
Can I use auto parts on my Ilmor marine engine?

Electrical, ignition, and fuel system components on Ilmor High-Performance engines are designed and manufactured to comply with U.S. Coast Guard rules and regulations to minimize risks of fire or explosion. Use of replacement electrical, ignition, or fuel system components, which do not comply with these rules and regulations, could result in a fire or explosion hazard and is prohibited by federal law. Please note that use of any non-authorized part may also affect your warranty coverage. Consult your authorized service center for additional information and assistance.

What can I do about Vapor Lock?

Vapor Lock is the unwanted formation of fuel vapors as a result of the heat build-up in the engine compartment of your high-performance boat. Standard equipment on all Gen IV Ilmor MV10 engines is the Ilmor Anti-Vapor Lock System, which supplies vapor-free fuel directly to the fuel injectors for trouble-free starting on those hot summer days.

Here are some tips to help reduce vapor lock:

  • Let the engine idle for 3-5 minutes with the bilge blower running before shutting it off.
  • Run the bilge blower 4 minutes before starting.
  • Run the bilge blower anytime the engine is operated at low speed.
  • Open the engine cover to let the hot air escape. Be sure to reinstall the engine cover before starting the engine.

If you continue to have issues with Vapor Lock, please contact your authorized service center for assistance and technical support.

What kind of spare parts should I carry on my boat?

Anything can happen on the water, so it's best to be prepared. Consult your dealer or authorized service center for recommendations.

My stern drive paint is peeling and/or blistering. What is going on?

Peeling paint is one of the first signs of galvanic corrosion. Galvanic corrosion occurs when two dissimilar metals are together in the same electrolytic compound (i.e. saltwater). Exposed metal will cause the component to be under protected by the anode and must be corrected immediately. As the corrosion continues, the exposed metal areas will be eroded away. Galvanic corrosion of any aluminum component on your boat is exacerbated by the attachment of stainless steel parts. At any sign of corrosion consult your dealer or authorized service center.

Is there a repainting procedure for my "INDY®" Stern Drive?

Yes, we recommend that this procedure be performed at the Ilmor High-Performance facility. Please contact your authorized service center for more information.

Will modification of my engine or stern drive affect the warranty?

Ilmor High-Performance warranty coverage does not apply to damage or failures caused by use of an accessory or part not manufactured or sold by Ilmor. For more information, read the full details on warranty coverage by clicking here. Should you have additional questions, email us on our Contact page.

Can I do my own maintenance and repairs?

Ilmor MV10 engines and drive products are very complex and technologically advanced machines, requiring special tools and expertise. As your safety is extremely important to us, we recommend only Ilmor-certified technicians perform maintenance or service work.

Where is the engine serial number located?

The serial number is located on the starboard side of the cylinder block. Additional details can be found in your owner's manual. Please contact your authorized service center for more information.

Where can I buy Ilmor High-Performance engines and drives?

Ilmor is no longer producing the MV10 engines and INDY drives.  However, the MV8-570 engine is still available for purchase.  Contact your boat builder, authorized dealer or service center, or Ilmor High-Performance for information. 

What engine platform are the Ilmor High-Performance engines based upon?

The Ilmor High-Performance MV10 engines are based upon Chrysler's line of engine products.  The MV8-570 is based upon the GM LS 7.4L (454 cu-in) block.

Are the Ilmor High-Performance engines emissions certified?

All Ilmor High-Performance engines are EPA certified and EU-RCD certified. Gen IV MV10 engines are also California Air Resources Board (CARB) certified.

Which propeller should I choose for optimum performance with my Ilmor engine and drive?

Selecting the best propeller requires information about your boat size, engine performance and use.Consult with your boat manufacturer, dealer or authorized service center to assist you with choosing the appropriate propeller for your boat.

Where can I get an Owner's Manual and maintenance schedules?

Ilmor Owner's manuals are available for download in our Warranties / Manuals section on this website. The maintenance schedule is included as part of the Owner's manual.

How do I obtain installation information, including drawings?

Installation information, including drawings, is available from Ilmor High-Performance upon request. Should you have additional questions, please contact us or your authorized service center.

Where can I learn more information about my warranty?

You can read the full details on warranty coverage by visiting our Warranties / Manuals section. Should you have additional questions, email us on our Contact page.

Do I have to register my engines/drives for warranty? If so, how do I?

Ilmor requires that every engine be registered for warranty. This allows us to contact you in case of any future service updates, as well as maintain up-to-date records on your product quality. Your engine should be registered by your selling dealer. Please contact your authorized dealer or service center for assistance. 

Where is the engine serial number located?

The serial number is located on the starboard side of the cylinder block. Additional details can be found in your owner's manual. Please contact your authorized service center for more information.

Where can I buy Ilmor High-Performance parts?

Ilmor High-Performance parts are currently available through authorized dealers and service centers.

I'd like to order parts, but can't find the part numbers. What should I do?

Please contact your dealer or authorized service center to determine which parts you need to order. You will be required to provide the serial number(s) of your engine and drive (if applicable).