How To Unseize Snowmobile Engine: (Complete Guide)

How To Unseize Snowmobile Engine

Modern snowmobiles typically have an oil light like a car to indicate when you’re low and need a refill. Paying attention to that light can help prevent seized engines and keep you riding all winter.

Keeping oil on hand can save you a lot of expensive repairs. How do you unseize a snowmobile engine? Read on, and I’ll teach you how to remedy this problem quickly at home so you can ride worry-free.

To unseize a snowmobile engine, you need a proper diagnosis of what caused the problem. Most of the time, it’s an issue of too little oil or oil not getting where it needs to go to lubricate the parts correctly. PB Blaster or Marvel Mystery Oil will help unlock stuck components if you leave it inside for a few days.

What Causes A Snowmobile Engine To Seize

The most common cause of a seized snowmobile engine is low or no oil, which happens if you forget to fill it or the belt breaks.

Without this vital fluid, the parts inside your engine rub together, causing friction, and creating heat. Overly hot engines can quickly become damaged and seize.

According to Jerry Gervais The Snowmobile Doctor, “Have someone tow it, don’t drive it anymore until it’s looked at because it could save you hundreds of dollars,”

Water or rust inside will also cause engines to seize. Additionally, sleds that have been in storage for a while sometimes become homes for mice.

In this case, you have to clean out the nests to get the engine working again.

How Do I Know If My Snowmobile Engine Is Seized

There are a lot of things that indicate a seized engine. Primarily, it doesn’t run.

However, engines stop running for other reasons as well, so I’ve compiled a list of other symptoms of a seized engine that can help you troubleshoot.

Your snowmobile engine may have any of these additional signs, but it won’t necessarily have all of them.

  • There’s no oil in it.
  • The starter only clicks, but it doesn’t turn over.
  • A thumping or clunking sound is the only noise from the engine when it doesn’t turn on.
  • Electronics work fine, but the engine does nothing.
  • You can see rusty parts.
  • A burnt smell comes from the engine area. This can be from wires overheating as a result of the seized engine. However, it is important to note that it’s not the cause.
  • You can see a defective part or a hole in the engine block on inspection.

How To Unseize A Snowmobile Engine – (Step By Step Process)

The directions below are for unseizing a snowmobile engine with a lubrication issue or rust. If you have rust, you’ll need to replace parts as well.

However, it’s important to note that this is the most common but not the only thing that can cause an engine to seize.

1 – Diagnosis

Always make sure you diagnose the cause correctly before effecting a fix, or it will create a new problem.

Double-checking is still a good idea even if you’re ‘pretty sure’ your problem is a lack of oil.

Take a look under the hood to ensure your belt is in working order because a slipped or broken belt can lead to oil not moving through the engine.

If your belt is worn or out of place, fix that first, and your engine should run and move oil again.

2 – Add Lubricant

You have plenty of options here. Transmission fluid mixed with gasoline or on its own and WD40 are both okay choices.

Marvel Mystery Oil and PB Blaster are among the best options.

However, Kerosene, diesel, heating oil, pretty much any form of petroleum with a water-thin viscosity will work.

3 – Wait

Patience is more important than you might expect when trying to unseize a snowmobile engine.

Try to move it too soon or push too hard, and you will do additional damage.

Depending on how badly seized your snowmobile engine is, you need to wait anywhere from 3 days to 3 weeks for the lubricant to do its job correctly.

4 – Warm It Up

If the engine still doesn’t turn, some people recommend using kerosene on top of the pistons and lighting it on fire to warm things up.

However, I cannot suggest this course of action for safety and practical reasons. Instead, work indoors in a heated space and consider carefully pointing a small heater or heat gun at the pistons for a few minutes.

5 – Tap Pistons Carefully

For this step, you will need a dowel of the exact same diameter as your pistons and a hammer.

Working on one at a time, place the dowel inside and gently (very gently) tap until it comes loose.

Tapping around the edges and not in the center is essential as that will put a hole in your pistons.

Once the pistons are freed up to move again, the engine should start. If this process does not work, you must take it to a professional for assessment and repairs.

Unfortunately, the lube-wait-tap process will not be enough to get things running again if your pistons melt from running too hot.

However, this fix will work on many seized engines when done correctly.

Pro Tip: Always do your scheduled maintenance and immediately clean or replace parts that show signs of rust and wear. Rusty parts scrape, and the corrosion eats the metal away. There’s no fix for missing metal.

Helpful Tips To Know About How To Unseize Snowmobile Engine

Many seized snowmobile engines can be remedied at home with a few tools and some basic understanding of what caused the problem in the first place.

Hopefully, your engine just needed some oil, and the process above was enough to fix it.

Here are more helpful tips to know about how to unseize a snowmobile engine.

  • If water gets into your engine and then freezes, it can cause the whole engine to refuse to move. This is a common mistake with a simple solution. Put the snowmobile somewhere warm for a while and try again. It should start right up if it’s just frozen.
  • Melted aluminum pistons are about the worst reason a snowmobile engine can seize. If your snowmobile ran hot enough to melt aluminum, there’s no easy fix for it. Regrettably, you will probably need a new engine since melted parts will not return to normal function no matter what fix you attempt.
  • A seized starter may feel like a seized engine, but it’s not. Happily, if your starter seizes, the fix is quick, easy, and relatively cheap.
  • While plenty of fluids work to unseize a snowmobile engine, please do not use brake fluid. Although it sometimes works, and you may even find it on a recommendation list, it will also eat away at your rubber seals and any paint it touches. Without seals, many parts of your engine will stop working in very short order. Sadly, this is a costly mistake that leads to more repairs.

Final Thoughts

Snowmobiles are essential for people in snowy regions, so a seized engine is no laughing matter.

If you suspect you are low on oil, please stop immediately and add more or have your sled towed.

An improper diagnosis can create more problems, so it’s essential to understand the cause before attempting to fix anything.

Fortunately, most of the time, the issue is oil not getting to the parts, and you can fix it with the right, high-quality lubricant and some patience.

Running the engine hot with too little oil will melt parts inside and lead to a costly replacement. Your check oil light is something you should never ignore.

Drew Thomas

My name is Drew Thomas and I’m the creator of Fun In the Yard, your one stop site for all your outdoor games, sports, party activities, outdoor gear, and lawn & gardening tips.

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