Four stroke outboards, their features, functions and specifications
Mariner's two-stroke outboards come in three models, two-strokes ranging from 2.5- to 15-horsepower, 40- to 60-horsepower and 70- to 90-horsepower models; the Marathon, in 25- to 90-horsepower models; and the OptiMax, with 115, 200 or 225 horsepower. Mercury Outboard Serial & Model Number Guide Knowing the features and year of your Mercury outboard can help with ordering Mercury outboard parts and Mercury outboard repair manuals. You can find your Mercury outboard serial number and model number on an ID tag on the mounting bracket, or in some cases on an engine block freeze plug.
Outstanding Fuel Economy and Clean Emissions
Yamaha offers a full model lineup in four stroke engines from 425ps to 2.5ps that deliver superb fuel economy and cleaner emissions. Outboards of 20ps and higher are equipped with high-performance fuel injection to take that performance to even higher levels. In many models, our advanced technology realizes acceleration performance and a lightweight, compact design.
- Mercury Outboards. 50 HP 40 HP 25 HP 20 HP 15 HP 9.9 HP 8 HP 5 HP 4 HP 3 HP. 30ELPTO 30EO 30M 30M 4-Stroke 30M Seapro 30M Seapro 2 Cyl. 30ML 30ML 4-Stroke.
- 2-stroke & 4-stroke HP Range: 2.5 - 3.5 - 4 - 5 - 6 - 8 - 9.8 - 9.9 - 15 - 20 - 25 - 30 - 40 - 50 - 60 - 70 - 75 - 90 - 115 - 120 - 135 - 150 - 175 - 190 - 200 - 220.
V6 4.2-liter 300-225ps
L4 200-115ps
From 70-2.5ps models
The lineups of outboard models offered differ by country or area. Product names, coloring and graphics may also differ. The specifications of outboards shown on this website may be changed or production discontinued without notice.
Always read your owner's manual before using the outboard and be sure to use it properly.
Direct inquiries concerning Yamaha outboards to your country's distributor or local dealership..
Arida
New member
- Joined
- 4 Mar 2012
- Messages
- 128
- Location
- Fareham, Hants.
Yamaha 2 Stroke Outboard Motors
Mercury 2 Stroke Outboard Motors
I have a 4HP 1980s vintage Mariner outboard (Yam built, 6E0 engine, earlier shear pin drive prop) which is used on a tender to get out to our mooring.
Once running, the engine is fine. However it is a pig to start, bad enough when cold but seemingly even worse if it was already used a couple of hours before. No signs of life at all when the cord is pulled repeatedly, then sudden firing after 10 or more attempts.
Any ideas what might be up? Would probably benefit from a general service, but am interested in any specific problems which are likely to affect starting. Or is there a particular technique which works well with these engines?
Engine is stored upright at home, but on its side in the car on the way down to the boat. It is stopped using the stop button as we approach the shore - I know letting it run out of fuel is generally preferred, but this is difficult to judge.
Any thoughts appreciated. Also if anyone knows a souce of a cheap propeller for this engine please let me know!
Regards, Rob