The trawler is not just the back of the boat, it's a key element that determines its functionality. Without a properly installed transom, you can't fix the outboard motor, provide stability on the water or comfortably accommodate passengers. But many owners of PVC boats and aluminum models face problems: the trawler falls off after the season, the engine vibrates, and the stern begins to walk on the wave. Why does this happen?
In 90% of cases, the cause is mischoice of materials, understrengthening or mounting-modeThis article will help avoid the typical mistakes, from choosing plywood and aluminum profiles to finishing with sealant. Frigate., "Winger.") and metal (e.g. "Kazanka", "Ob."), and also give a checklist for self-checking the quality of installation.
What materials will be needed to install the transom
Material choices have a direct impact on the longevity of the structure, and cheap plywood or inappropriate glue causes the transom to unwind after the first launching, and this is what really works:
- 🛠️ phanera:optimal FSF (water resistant) with a thickness of 12-18 mm For motors up to 15 hp 12 mm, over 18 mm. aluminum sheet 4-6 mm (for metal boats).
- 🧴 Clay.:only polyurethane (for example, "Soudal Fix All"or epoxy ("EDP"Silicone and Moment are not working!
- 🔩 Fortress.: stainless bolts M6-M8 with nuts and washers (bolt length = transom thickness + 20 mm). brass rivet.
- 🔧 Amplifiers.: aluminum corners 30×30 mm or steel plates 3-4 mm for load distribution.
Important: If you have a PVC boat, Do not use screws without washers - they will cut through the material in 2-3 monthsIt's a good fit for this. squirt-hat Or rubber-stick bolts.
Preparation of the boat for the installation of transom
Before installation, you have to prepare the surface carefully, and this is a step that is often missed, but it's critical for the reliability of the attachment.
- Remove the old transom (if any) by cutting off the bolts with a Bulgarian or a hacksaw. solvent 646.
- Clean the stern of the boat with sandpaper
P80–P120(for aluminum) or acetone (for PVC). - Check the geometry of the feed level - a skew of more than 3 mm will lead to uneven load on the engine.
For PVC boats, additionally:
- 🔥 Warm up the place of attachment with a building hairdryer (temperature 60-70 C) - this will improve adhesion of the glue.
- 📏 Apply marking with a pencil, retreating from the edge of the balloon by 10-15 cm (depending on the engine power).
If the transom is installed on an aluminum boat, pre-treat the mounting places. Zincorom. This will prevent corrosion at the points of contact with the bolts.
Step-by-step instruction for mounting the transcen
The installation technology is different for PVC and metal boats. Let's look at both.
For PVC boats (e.g. Frigate 320., "The Wing 360.")
Cut the transom on a template with a tolerance of 2-3 mm
Treat the edges with sandpaper and soak in olive oil
Drill holes under bolts ( 0.5 mm less bolt)
Then, apply the stains on both sides of the sleeve.
1. Glue attachment + bolts:
- Put the glue on. "Soudal Fix All" Zigzag on the transom and stern of the boat.
- Press the transom and fix with strubcines for 24 hours (temperature not lower than +15 ° C).
- Drill holes through the trawler and the boat cylinder, install bolts with rubber gaskets.
2. Strengthening:
On the inside of the balloon, stick a 3 mm thick aluminum plate that replicates the shape of the transom, and this will distribute the load from the motor.
For metal boats ("Kazanka", "Ob-Pro")
1. Welding or bolts? For aluminum boats, welding is not recommended, it weakens the metal.
- 🔩 Use M8 bolts with nuts, laying between the transom and the body rubber-layer.
- 🔧 Strengthen the structure with steel corners of 40 40 mm welded to the body.
2. Hermetization:
All joints and heads of bolts handle Sikaflex-291 sealantNot only does it protect against water, it also dampens vibrations.
What happens if you don't use a sealant?
Without sealing, the microgaps between the transom and the body will get water, freeze and expand in winter, causing cracks in the plywood or corrosion of the metal, and within a year, the transom can peel off and the bolts rust so that they can't be unscrewed.
Common Mistakes and How to Avoid Them
Even experienced boaters sometimes make mistakes that shorten the life of the transom.
| Mistake. | Effects of consequences | How to avoid |
|---|---|---|
| Using a silicone sealant instead of glue | Tran will fall off in 2-3 months | Use only polyurethane or epoxy glue |
| No washer bolts on PVC boat | Cutting through material, leaking | Use wide washers or brass rivets |
| Non-reporting engine weight | Transformation, vibrations | For the engine 15+ hp take plywood 18 mm + amplifiers |
| Lack of ventilation under the transcension | Condensate buildup, plywood rotting | Drill 2-3 holes 10 mm in the lower part |
⚠️ Attention: If you are installing a transom on a boat with keel-beam (for example, Kazanka M.), be sure to tie it to the beam with a steel bar of 8 mm. Otherwise, when the wave of the stern will "play", and the motor will begin to vibrate.
How to check the quality of the transom installation
After installation, you need to test the structure.
- Visual examination: Check if there is any gap between the transom and the body. The clearance is no more than 1 mm.
- Strength test: Pull the transom on yourself with a force of 20-30 kg. If it moved, the attachment is unreliable.
- Water test:
- 🚤 Start the engine at idle speeds - there should be no vibrations.
- 🌊 Walk along the wave: the transom should not "walk" or make creaks.
If you have a problem after the test, don't delay the work. squeak often indicates insufficient sealing, and vibration - on the weak attachment of the bolts.
Even if the transom seems strong, after 2-3 exits to the water, check the tightening of the bolts - they could weaken from the vibrations of the engine.
Transpant maintenance: how to extend the service life
Tran requires regular maintenance, especially if the boat is stored outside or in an unheated garage.
- 🧽 After each exit: Wash the transom with fresh water to remove salt and sand.
- 🔧 Once a season: Tighten the bolts, check the sealant for cracks.
- 🛡️ Before the winter:
- Grease the bolts "WD-40" Or solidol.
- Handle the plywood sail-lacquer (unless the transom is aluminum).
For PVC boats, you can also re-install the glue layer under the transom, once every 2 years, and over time, it loses its elasticity, and the risk of detachment increases.
⚠️ Attention: If there are cracks on the transom, even small ones, don't seal them with sealants. structural fatigue The squirrel must be reinforced or replaced.
FAQ: Frequent questions about translating
Can a transom be installed on an inflatable boat without cylinders (for example, Sevastopol.)?
Technically, yes, but it requires additional reinforcement. slick-bar (wooden or aluminum slats running down the bottom) Use:
- Plywood 20 mm + aluminum corners.
- Clay. "3M 5200" (nautical class)
- M8 bolts with nuts for quick dismantling.
Important: the maximum power of the engine for such boats is 5-8 hp.
Which is better: removable or stationary?
The choice depends on the tasks:
| Removable transom | Stationary transan |
|---|---|
|
✅ Easy to dismantle for transportation ✅ You can adjust the height for an outboard motor ❌ Less rigid, suitable for motors up to 10 hp. |
✅ It can withstand engines 15+ hp ✅ More reliable and durable ❌ It's more difficult to transport a boat. |
For fishing in small water bodies, a removable option is suitable. For sea trips or powerful engines, only stationary.
What to do if the squirrel starts to rot?
If the plywood is swelled or darkened:
- Remove the transom, clean the attachment site of old glue.
- Dry the plywood with a hair dryer or replace it with a new one.
- Treat with an antiseptic (for example) Senege Ecobio.).
- Use it when you install it. epoxy - it's waterproof.
If the rot is deep (more than 5 mm), the transom must be replaced.
Can I use a transom from another boat?
Yes, but with reservations:
- 📏 The dimensions should be the same as the width of the feed (2 cm).
- 🔧 The bolt holes should not fall on the cylinder seams (for PVC).
- ⚖️ The track must bear the weight of your motor (check passport details).
It is better to remake the old transom to suit your needs: cut, reinforce the corners than risk with an incompatible model.
Do I need to paint a transom?
Paint is not necessary, but it is useful:
- 🎨 For plywood: yacht-varnish or pellet (2 layers).
- 🔵 For aluminum: metal-coated.
The paint protects against UV rays (relevant to southern regions) and masks minor defects. But before painting, be sure to degrease the surface!