How fast will a 8hp outboard go?
5 4 blade prop and manual JP tops out 20 to 21 mph. (6) 1436 G3 with 8hp merc tops out 16 to 18 mph. Alll flat-bottom jon boat runs skinny everywhere… canals, creeks, ponds, backlish water.
How much does a Yamaha 8hp 2 stroke weight?
87 lbs
Specs & Compare
| Engine Type | 2 cyl |
|---|---|
| Weight † | 39 kg (87 lbs) – 42 kg (93 lbs) |
| Recommended Fuel | Octane 87 |
| Recommended Engine Oil | Yamalube® 4M (See owner’s manual) |
| Recommended Fuel Filtration | Yamaha 10-Micron Fuel/Water Separating Filter (external) |
Are Yamaha 2 stroke outboards good?
Yamaha’s 2-strokes received high marks for reliability from new boat/motor owners. The boat/engine owners’ answers were then compiled into the engine performance index. 2-Strokes. Yamaha had the highest index score among 2-stroke outboard engines, J.D. Power stated.
How do you improve a 2 stroke outboard performance?
How to make a 2 stroke more powerful
- Consider reed valve for more horsepower.
- Reduce the Squish gap.
- Down jet the engine.
- Inspect your exhaust system.
- Work on your intake.
- Get the cylinder ported.
- Check the Ignition timing.
- Make your exhaust system stinger ID smaller.
How fast will a 4 hp boat motor go?
With the throttle all forward and with the waves pushing the stern, the boat planes and reaches a speed of 12 knots. At this speed, I note with some surprise that the engine, even at full power, is little noisy.
What is the oil ratio for a 2 stroke outboard Yamaha?
Yamaha recommends a 100:1 mix ratio.
Does Yamaha make 2 stroke outboards?
The two stroke outboards are lightweight and compact yet deliver high power output. The engine structure is relatively simple and maintenance is exceedingly easy. Although we have lineup of four strokes, we also offer an extensive two stroke lineup to meet diverse global needs.
How long will a Yamaha outboard last?
1,500 – 3,000 hours
Failure to Perform Regular Maintenance Boater owners committed to regular maintenance will also often ask, “How many hours will a Yamaha outboard last?” While Yamaha makes a diverse line of outboard motors, most models will last 1,500 – 3,000 hours depending on how often it is maintained, stored, and used.
How do you increase compression ratio on a 2 stroke?
Remove the cylinder head, under the head, sitting on top of the liner there should be some shims in the form of rings. There may be just one or several. Reducing the thickness of this shimstack will give higher compression. On an average sport type engine you will notice little if any difference.