FUEL AND OIL REQUIREMENTS
It is critical that the fuel and oil requirements for the various Indmar/Ford based engines are followed.
The standard model 360 and the premium 400 and 440 (Malibu 410 and 450) models are designed to operate on 89 octane fuel with a maximum ethanol content of 10%.
The new model 460 and the supercharged 575 are designed to run on premium grade,
91-93 octane fuel with a maximum of 10% ethanol.
All of the 6.2L Indmar/Ford engines are equipped with knock sensors that will detect pre-ignition and detonation to help protect the engine from damage if the fuel quality is low and the engine starts ”pinging” or “spark knocking”. Unfortunately, there is a limit to how much protection the system can provide. Typically the system responds to spark knock by retarding the ignition timing. In most cases, retarding the timing by a few degrees will stop the knock and protect the engine. There are situations where the system has retarded the ignition timing to the maximum allowable limit and the knock continues. This most often occurs in situations where the boat is heavily loaded, is over propped so the engine is unable to turn in its designated RPM range, and the fuel is not the required octane level for the engine. The result of operating the engine in those “continuous knock” conditions is generally catastrophic engine failure that is not covered by Indmar’s limited warranty.
The Indmar branded 5W30 and 15W50 are recommended and meet all of our requirements but any commercially available oils meeting the engine’s requirements are acceptable.
The use of an oil that does not meet Indmar’s viscosity and API requirements and a lubrication related engine failure occurs, that failure may not be warrantable.
11/28/2017 01:11:07 am
Thank you for sharing such a useful and informative post with us. Different types of oils used in the car should be checked at a regular interval and if needed should be changed according to the manufacturer's recommendation. Ethanol should be in appropriate proportion as suitable for the Ford engine. Transmission oil should be checked and should be changed at a regular interval of about 15,000 miles. Engine oil should be changed after after an interval of 6,000 miles. And car service should not be skipped by any means.
5/23/2022 06:22:05 pm
Thanks for sharing
It's interesting to know that there can be sensors in boat fuel tanks that can protect the engine from pre-ignition and detonation, especially when the fuel quality is low. I can imagine how important that would be to ensure that the vessel will not catch fire at some point in time. In my opinion, it is worth it to invest in systems that can keep your boat from any type of damage, because it is definitely a more expensive type of vehicle to care for.
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