Old 2stroke outboard
Discussion
I've finally managed to get my hands on an old Yamaha 2stroke outboard. It's only a 15hp but I think ideal for what I want it for.
This engine has been sat on an upright stand for at least 5 years without any maintenance. Believed to be in good working order prior to this. What steps do I need to take to get this engine going again. I don't want to just add fuel and pull away at the cord if i'm risking damage. At the same time I don't have money to just drop it off at a boat yard for a rebuild.
Also, this engine has the steering control arm with the throttle at the end as a twist grip. Currently the throttle doesn't twist and as far as I can make out, it's because there's some kind of stop screwed onto the metal rod from the twist grip. I'm not sure if that makes sense but does anyone know why that would be there? Could it have been plumbed into cable controls previously? Maybe It just needs removing.
Any advice would be great. Also, what size fishing boat would this be suited to. My friend has a small fibreglass mock-clinker that he thinks it would suit but I wanted to be sure it's not too big before trying it all out.
I have previous experience with boats from what seems like a previous life, unfortunately the mechanical side of it was always taken care of by others.
This engine has been sat on an upright stand for at least 5 years without any maintenance. Believed to be in good working order prior to this. What steps do I need to take to get this engine going again. I don't want to just add fuel and pull away at the cord if i'm risking damage. At the same time I don't have money to just drop it off at a boat yard for a rebuild.
Also, this engine has the steering control arm with the throttle at the end as a twist grip. Currently the throttle doesn't twist and as far as I can make out, it's because there's some kind of stop screwed onto the metal rod from the twist grip. I'm not sure if that makes sense but does anyone know why that would be there? Could it have been plumbed into cable controls previously? Maybe It just needs removing.
Any advice would be great. Also, what size fishing boat would this be suited to. My friend has a small fibreglass mock-clinker that he thinks it would suit but I wanted to be sure it's not too big before trying it all out.
I have previous experience with boats from what seems like a previous life, unfortunately the mechanical side of it was always taken care of by others.
The stop sounds like the friction adjuster; if you back it off the throttle should(if everything else is working) spring closed when you let it go. If it's been stored in a dry place and turns over, bunging some fuel through it and running it up in a barrel of water is the best thing really. After siezing(pistons, clamp screws, pivots etc), the most likely problem will be grot in the carbs, which is a quick job to sort on motors this size. Unless you're wanting speed, wetness and excitement something about ~15' would be best to give a stable platform for fishing from.
Well, first thing first, congrats on now owning one of the finest small outboards ever made (I have one too, on the back of my dinghy RIB).
If the throttle seems iffy, the cables on the twisty may be shagged, just change them for new. As for standing for a while, get a fuel pump rebuild kit (about a tenner) as the diaphrams go off. Change the plugs and some fresh fuel, jobs a good'un.
Make sure your leg length is correct for the new boat, I think they made 3 sizes.
If the throttle seems iffy, the cables on the twisty may be shagged, just change them for new. As for standing for a while, get a fuel pump rebuild kit (about a tenner) as the diaphrams go off. Change the plugs and some fresh fuel, jobs a good'un.
Make sure your leg length is correct for the new boat, I think they made 3 sizes.
Fishtigua said:
If the throttle seems iffy, the cables on the twisty may be shagged, just change them for new. As for standing for a while, get a fuel pump rebuild kit (about a tenner) as the diaphrams go off. Change the plugs and some fresh fuel, jobs a good'un.
.
Thanks for the replies so far. Regarding the cable, it seems to be a series rods and cogs rather than cables. I havn't had a good look yet mind. .
I presume I need an engine number for parts, where would I find the identification number.
rufusgti said:
I presume I need an engine number for parts, where would I find the identification number.
Yes you will, most definitely. If you look just under the motor, on the saddle, you should see a Yam number on a plate.http://www.simyamaha.com/Model_Code_Reference_s/17...
Part lists are available here: http://www.yamaha-motor.eu/uk/information/parts-ca...
Give our parts line a call on 01590 613603 and Terry (our full time parts guy) will be able to help you out with any parts you need.
It's a great engine, I have one too. They're very sought after and you can almost name your price when you’re selling them! They’re pretty indestructible, so just follow everything back and check that none of the linkages are stuck. Make sure it hasn’t got any old fuel in too. If it has, it will need cleaning out.
The engine will suit most small boats. I have one on a Zodiac 3.4m, realistically anything from 3m up to 4.5m really.
Give our parts line a call on 01590 613603 and Terry (our full time parts guy) will be able to help you out with any parts you need.
It's a great engine, I have one too. They're very sought after and you can almost name your price when you’re selling them! They’re pretty indestructible, so just follow everything back and check that none of the linkages are stuck. Make sure it hasn’t got any old fuel in too. If it has, it will need cleaning out.
The engine will suit most small boats. I have one on a Zodiac 3.4m, realistically anything from 3m up to 4.5m really.
Edited by zed4 on Monday 22 July 10:52
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