It’s winter and many of use aren’t getting out on the water as often as we do during the warmer months. You may have seen our previous article on getting your boat ready for winter. So now might be the time to consider replacing your boat engine, often referred to as “repowering your boat”.

Whether it’s old and faulty or simply doesn’t have the power you need to do the things you want, replacing your boat engine is a big task that should be carefully considered. At, we want you to be happy with your boat, so we’ve put together some of the basic things you should consider when looking at repowering.

When To Replace The Engine

Old & Costing Money

Obviously, much like a car, if your boat’s engine is breaking down regularly or not starting properly, and repairs are likely to cost close to the value of the engine it may be time to cut your losses. Especially with a boat as engine trouble could end up with you lost at sea rather than on the side of the road where cars regularly pass.


Another consideration though is the power level. Whether you have an outboard motor or an inboard engine, if it won’t let you do what the boat is intended for something needs to be done. Small boat engines are great for relaxing fishing trips but, unbeknown to some, with power boats more power actually equals less fuel consumption. You need the right engine for your uses.

Things To Consider When Replacing Your Boat Engine

Manufacturer Guidelines

Check the ratings and recommendations from your boat manufacturer for the ideal engine size and horsepower for your boat as this can be complicated. For example, a 12 foot light aluminium boat will not be able to carry the same horse power as a heavy, fibreglass boat the same length. Don’t exceed the maximum power guidelines.

Determine Speed & Power

Within the manufacturer guidelines, find out what your speed requirements are. If you’re towing skiers you’ll need a lot more power than if you’re just cruising for fishing locations.


If you’re going for a new engine you’re better off getting everything done right the first time. So consider the extras that are available, such as hydraulic tilt, cable steering and electric start. For many of these accessories you need a compatible motor so it will affect your final decision.

Does It Fit?

With outboard motors the transom height and power-shaft need to fit correctly. If the power-shaft is too short or long it may either not draw water or drag on the bottom in shallow water.

With inboard motors the engine access can add some significant costs. Most boats are built with the engines already installed before the deck is fastened. Although there is a hatch to access the engine, it may not be large enough to remove the engine or put a new one in (especially if you’re upgrading to a more powerful boat engine).

That should give you an idea of whether it’s time to upgrade your boat engine, and some considerations to help you save money and choose the right engine the first time.

If you need help with buying a new engine contact us at Boat Loans Now on 1300 889 669. We offer competitive rates on Boat Engine Finance, so you can repower your boat sooner rather than later.