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Last Updated on September 8, 2019 by Amy
The dingy and its outboard engine are a vital part of the cruising life, shuttling us to and from the shore, to other boats, and carrying all manner of items for us, from groceries to scuba/snorkel gear etc. Choosing the right combination has taken a lot of time and research. Here’s the thought process that went into our decision on which dinghy and outboard to buy.
Inflatable vs. Rigid Inflatable Boat (RIB) Dinghy
An inflatable dinghy is just as it sounds, fully inflatable, while a rigid dinghy offers a solid, V-shaped bottom. Typically, if you have limited space or significant weight limits, a full inflatable dinghy may be the route to go.
However, many cruising boats have dinghy davits that stow the dinghy out of the way. For us, it’s aft between the two hulls. We were interested in a dingy that will be stable, offer good performance and will hold up to heavy use in harsh environments like the tropics.
Inflatable Pros: Lightweight; easy to fold up and store; low cost.
Inflatable Cons: Flat bottom -won’t get up on a plane and won’t track well; could be damaged by shallow rocks or beaches; doesn’t tow well
RIB Pros: High load capacity, can handle larger outboard engines (read FAST), less likely to be damaged when pulled ashore
RIB Cons: Heavy; expensive; more difficult to stow
Our Choice: RIB
We ended up choosing a RIB. Our davits make the space needed for the dinghy a non-issue, and we have an electric winch on the boat to help raise the dinghy, making the weight of the dingy a bit less important. A RIB will stand up better to the uses we intend and seem to be the popular choice among cruisers.
Fiberglass vs Aluminum Hull
Having decided that we wanted a RIB dinghy, the next choice to make is what material you want the hull to be made out of. Most dinghy companies offer a fiberglass hull option, which does provide a lot of benefits but could be more easily damaged on rocks in comparison to an aluminum hull.
Fiberglass Pros: Cheaper, more easily available
Fiberglass Cons: Heavier
Aluminium Pros: Lighter weight, more rugged
Aluminum Cons: More expensive, fewer options to choose from
Our Choice: Aluminum
In this instance, weight was a big factor that caused us to go for an aluminum hull. Some of the aluminum hull dinghies weight almost 45% less than their equivalent fiberglass counterparts.
The Helia dinghy davits are rated for a total of 220 kg, or 485 lbs and I knew we wanted a large outboard engine so we could go fast. Saving weight with an aluminum dinghy means we can get a large outboard and still come in under the davit weight limit.
In addition, some of our eventual cruising grounds are likely to have rocky beaches and an aluminum hull will hold up better over the long term.
Hypalon vs PVC
This is in reference to the fabric used to create the tubes of the dinghy. Hypalon is neoprene-coated nylon and the seams are hand glued while PVC seams are usually heat welded.
Hypalon Pros: More UV resistant so will withstand the tropics better
Hypalon Cons: More Expensive
PVC Cons: Less UV resistant so will break down quicker in the tropics
PVC Pros: Less expensive
Our Choice: Hypalon
We decided to go for a Hypalon dinghy. The additional upfront expense will be worth it in the increased life of the dinghy as we sail in the tropics. We’re also going to look at buying or having “chaps” custom made, which cover the inflatable tubes and further extend the lifespan.
Center Console vs Tiller Steering
This decision was a tough one for me. I really like the idea of having a dedicated steering console for the dinghy with a bench seat facing forward. The alternative requires you to sit on the tubes and steer using a tiller extension from the outboard. However, in the end I couldn’t justify the additional cost and weight of a center console so tiller steering it is.
The Final Decision
After looking at lots of dinghies offered by various companies, we ended up deciding on a Highfield Classic 310 Aluminum Hull dinghy. This is a 10′ dinghy that offers an optional upgrade to the Hypalon fabric, as well as a bow locker that can fit up to a 12-liter fuel tank. It has a long list of standard equipment and seems to be well-liked by those people who have cruised with one and overall seems to offer the best combination of features and price that I could find.
Once we made the decision, we then looked at buying one in the United States and shipping it to France in preparation for our crossing but decided that it will be easiest to work with a dealer in France. It will be a bit more expensive to buy the dinghy there and suffer the USD/Euro exchange rate, but the bulky size would make for difficult shipping.
We’ve met many cruisers that have OC Tenders, and we’ve ridden in quite a few. They are lighter than our Highfield dinghy, though they have a flat-bottom and wouldn’t perform as well in rougher conditions. Still, they are good looking dinghies, and everyone we know that has one loves it!
Dinghy Horsepower Capacity
The size of the outboard should actually be driven by the dinghy that’s been chosen. Dinghies are rated for a maximum horsepower capacity, which varies based on the length, weight, and type of hull. For the Highfield Classic 310, they recommend a 10hp outboard, with a max of 15hp. So what did we do? Went for the max size of course.
2-Stroke vs 4-Stroke
A 4-stroke outboard is very similar to a car engine. The air-fuel mixture flows into a combustion chamber through intake valves, gets combusted, and then the exhaust exits via exhaust valves. A 2-stroke is simpler and has the air-fuel mixture enter the combustion chamber through an opening in the side of the cylinder and then after combustion, the exhaust exits via a different port in the cylinder. Traditionally, a 2-stroke engine has weighed less than equivalent 4-strokes, but they aren’t quite as efficient and require the oil and gas to be mixed together. Modern 4-stroke outboards are still a bit heavier, but have cut down the weight difference substantially, and also offer smoother performance as well as significantly fewer emissions.
2-Stroke Pros: Lighter, better acceleration, easier to repair
2-Stroke Cons: Can’t buy in the United States (have to go to the Caribbean), more pollution, oil/gas mixture, noisier
4-Stroke Pros: Good fuel economy, quiet and smooth, less pollution, no oil/gas mixture, easily found in US
4-Stroke Cons: Slightly heavier, more expensive, more complex engine
Our Choice: 4-Stroke
We want to be good citizens of the world and with advances in technology continuing to drop the weight of 4-stroke engines, it was another pretty easy decision. Four-stroke engines are easily available here in the US, and we didn’t want to wait until we arrived in the Bahamas to have an outboard for our dinghy.
Our Outboard: Suzuki
There are a lot of outboard manufacturers to choose from, and we have experience with Yamaha, but we decided to go with a Suzuki 15hp, electric start outboard. These outboards use the latest in battery-less Electronic Fuel Injection technology, which means they don’t use a carburetor and after all the issues we had on the Star Cat with the carburetors on her old Yamaha outboards, I’m keen to avoid them again. The Suzuki is also the lightest 15hp outboard in it’s class, which is a plus. We did elect to go for an electric start model, which means we can hook up a small battery and start the engine at a push of a button, rather than having to continually pull the starter.
I was able to find one of these outboards on sale online in the US and then we shipped it to France.