July 1, 2026 · By Alexis
Deciding which parts to get for any repair job can be difficult, and that choice doesn’t get any easier when working on your or someone else’s prized possession. If you’re in the process of repairing your outboard motor, the options can be overwhelming. This article is here to help you make one of the more important decisions: “Is a shortblock or a longblock a better fit for my project?” Before we dive into the comparison of the two, it’s important to understand exactly what you’re looking at.
What is a shortblock?
A shortblock is an engine sub-assembly that often provides a more cost-effective solution for aging, damaged, or deteriorated engines. You can expect a shortblock to consist of a cylinder block, crankshaft, pistons, rods, and bearings. A shortblock is best when looking for a more cost-effective alternative when the cylinder heads are reuseable.
What is a longblock?
A longblock is the heart of your motor. It’s meant to be ready-to-install straight out of the box. A longblock comes complete with the cylinder heads installed and timed on the shortblock. Additionally, depending on the specific unit, some longblocks come with an oil pump and balancer. A longblock is ideal when you’re short on time or are not super familiar with the model you’re working on.
The Decision
Ultimately, when choosing between the two, the biggest variables are time, money, and experience/equipment. For example, if you run a service center that services multiple customers at once, you may not have the luxury of spending days on one boat. If you’re in a situation where efficiency is not worth compromising, a longblock is the better option. Alternatively, if you aren’t in any particular rush and are willing to put in the hours, as a project or otherwise, a shortblock is a fantastic choice.
Monetarily, a shortblock will always be the cheaper option upfront. However, depending on the parts you need, the necessary components to finish the build can add up quickly. Additionally, if labor cost is a concern for you, a shortblock can take multiple hours to completely assemble, increasing your total cost.
Finally, expertise and equipment play a huge role in the decision-making process. A shortblock is the obvious option if you are familiar with the model you’re working with and have the necessary equipment and knowledge to assemble it. However, assembling a longblock is a very meticulous process and requires extreme attention to detail. If you aren’t fully confident, it may be better to choose a complete longblock to avoid added costs or damaged components down the line.
You’ve Decided, now what?
OBR Parts + Marine offers both shortblocks and longblocks. While you can generally get either component from OEMs, OBR offers a cost-effective alternative. Completely remanufactured or new, we strive to give customers the best price without sacrificing the best quality. At OBR we have over 40 years of technical expertise, meaning that a purchase from us, longblock or shortblock, guarantees a product that’s up to OE specs and ready for your next adventure. We’re so confident in the products we offer that all of our powerheads have a 2-year warranty. Additionally, all of our stock is kept in-house, which means we’ll get your unit to you sooner than anyone else, with 99% of our orders going out the same day that they’re ordered.
Ultimate Takeaways
| Longblocks | Shortblocks |
|---|---|
| Best for: efficiency, lowering likelihood of long term expenses, motors that are new or unfamiliar | Best for: lower upfront cost, ability to reuse good components from old motor |
| Cons: higher up front cost | Cons: longer assembly time, potential to be more expensive with additional parts needed, unfamiliarity with the unit |
