Engine: What is it worth

[JSP]

Thinking, only thinking of changing the 115hp to something more economical but to even have a window shop would need to know what the engines worth to sell.
Yamaha 115 V4 1983
long
19" prop
Fair cosmetic condition

Any ideas ?

[Nos4r2]

Originally Posted by JSP

Thinking, only thinking of changing the 115hp to something more economical but to even have a window shop would need to know what the engines worth to sell.
Yamaha 115 V4 1983
long
19" prop
Fair cosmetic condition

Any ideas ?

Hard to say on something that old. I'd guess at £800-£1200 but it depends on the market at the moment.
To be fair to it, you'll prob use about the same fuel as I do for the same speeds. It's only at WOT that it'll make a difference. You'd need an Etec or an Opti to save anything worth bothering with on fuel.

[JSP]

Originally Posted by Nos4r2

Hard to say on something that old. I'd guess at £800-£1200 but it depends on the market at the moment.

Cheers

To be fair to it, you'll prob use about the same fuel as I do for the same speeds. It's only at WOT that it'll make a difference.

Do ya think? I've not enough experience with it to tell how much it drinks. I'm going purely off what I've read and thought with the age it must be using a tad more than that.

[Nos4r2]

Originally Posted by JSP

Cheers

Do ya think? I've not enough experience with it to tell how much it drinks. I'm going purely off what I've read and thought with the age it must be using a tad more than that.

It's carbed 2 stroke...they all drink a bit!

[JSP]

Originally Posted by Nos4r2

It's carbed 2 stroke...they all drink a bit!

Oh yeah, to be expected but thought lessening the HP and weight would help. Do ya think it wouldn't be noticeable N'mile per litre?

[Nos4r2]

Originally Posted by JSP

Do ya think it wouldn't be noticeable N'mile per litre?

Maybe-but not a lot unless you run at WOT all the time.

[Chris]

I had a 90HP Johnson V4 carbed engine on my last Rib when I bought it. Admitadly a few years youger than your Yamaha however it returned about 36 litres per hour at WOT. (36 knots)

I then had a 115 E-tec fitted to the same Hull and got about the same performance but at higher speeds (40 knots) due to the extra power. To be fair there was not a huge amount in it. Especially at cruising speeds of 25 knots

I would say stick with what you have if its running well.

If you want to know your fuel usage then fit one of these

http://www.consumersmarine.com/modpe...=3001&i=380071

It has a sender that you fit inline just before the engine and gives an accurate reading of current usage, trip fuel etc.

Handy if you are planning some longer trips.

[JSP]

Originally Posted by Nos4r2

Maybe-but not a lot unless you run at WOT all the time.

No chance
As always mate, thanks for the good advice!

[JSP]

Originally Posted by Chris

I had a 90HP Johnson V4 carbed engine on my last Rib when I bought it. Admitadly a few years youger than your Yamaha however it returned about 36 litres per hour at WOT. (36 knots)

I then had a 115 E-tec fitted to the same Hull and got about the same performance but at higher speeds (40 knots) due to the extra power. To be fair there was not a huge amount in it. Especially at cruising speeds of 25 knots

I would say stick with what you have if its running well.

If you want to know your fuel usage then fit one of these

http://www.consumersmarine.com/modpe...=3001&i=380071

It has a sender that you fit inline just before the engine and gives an accurate reading of current usage, trip fuel etc.

Handy if you are planning some longer trips.

Thanks Chris, maybe a worth wail thing to get.
How's your wifes photography going?

[Chris]

She's having fun getting to know the camera and has had soe good results.

I on the other had am completely useless finger in front of the lense. flash etc.

Complete camera numpty

[JSP]

Originally Posted by Chris

She's having fun getting to know the camera and has had soe good results.

I on the other had am completely useless finger in front of the lense. flash etc.

Complete camera numpty

Nice one, like I said, if I can be of any help

I'm a numpty when it comes to life!

[davej]

Hi.

We have a 94 version of that engine on our dive club Tornado 5.5. Its a great engine and while I agree its fairly thirsty, like any carbed 2S, it is very very reliable and has only had one item replaced apart from routine service items and that was a starter solinoid, about £100. My mate has a new F115 Yam on his Tornado and it is a little more economical but not alot in it and if you think of the cost it just doesn't make sense unless you use the engine a huge amount. I guess range might be a factor but we just put in a few cans to top up the internal 90l tank.

Davej

[JSP]

Originally Posted by davej

Hi.

We have a 94 version of that engine on our dive club Tornado 5.5. Its a great engine and while I agree its fairly thirsty, like any carbed 2S, it is very very reliable and has only had one item replaced apart from routine service items and that was a starter solinoid, about £100. My mate has a new F115 Yam on his Tornado and it is a little more economical but not alot in it and if you think of the cost it just doesn't make sense unless you use the engine a huge amount. I guess range might be a factor but we just put in a few cans to top up the internal 90l tank.

Davej

The reliability is something ever owner sings about. Good stuff, 115 stays. Cheers Davej
Wish I could afford to use a 90l tank each time

[Pete7]

John, Yam 115 manual says something like 45 lph at WOT. In practise we used 8 gallons a hour on a heavily laden dive boat, or cruising at high speed just didn't seem to make much difference.

Now, you might get the fuel figures down a bit by changing to a smaller engine but not a lot without spending alot on a 4 stroke or 2 st injection. Recon Matt is pretty much on the money with that engine, but I would keep it. It is a larger version of the Yam 90 and should run like a sewing machine. They were expensive engines new compared to the other makes and you should now be benefiting from the first owner paying the extra to buy Yamaha. I doubt you will recoup the price of a much newer engine so keep it, polish it, oil it and talk to it and it will bring you home everytime.

There was a fred about fuel figures a while back started by Bruce Hawker, worth a read to see that most folk seem to get between 1 and 1.5 lph.

Pete

[spartacus]

I doubt you will recoup the price of a much newer engine so keep it, polish it, oil it and talk to it and it will bring you home everytime.

There's a feel-good story if ever I heard one. I'm sure this topic comes up all the time - for owners that want a little extra power or to save on fuel consumption.

I'm still looking to upgrade my 40hp 2-stroke to 50hp 2-stroke, but my current engine is faultless. Difficult decision to make. Probably only worth it if you replace your current rig and trade-up or down.

[JSP]

Originally Posted by Pete7

John, Yam 115 manual says something like 45 lph at WOT. In practise we used 8 gallons a hour on a heavily laden dive boat, or cruising at high speed just didn't seem to make much difference.

Now, you might get the fuel figures down a bit by changing to a smaller engine but not a lot without spending alot on a 4 stroke or 2 st injection. Recon Matt is pretty much on the money with that engine, but I would keep it. It is a larger version of the Yam 90 and should run like a sewing machine. They were expensive engines new compared to the other makes and you should now be benefiting from the first owner paying the extra to buy Yamaha. I doubt you will recoup the price of a much newer engine so keep it, polish it, oil it and talk to it and it will bring you home everytime.

There was a fred about fuel figures a while back started by Bruce Hawker, worth a read to see that most folk seem to get between 1 and 1.5 lph.

Pete

That seems sound advice there Pete, thanks mate!

[Poly]

Originally Posted by Pete7

There was a fred about fuel figures a while back started by Bruce Hawker, worth a read to see that most folk seem to get between 1 and 1.5 lph.

I think you meant 1-1.5 L per mile - not L per hr that would be nice!

[Pete7]

Originally Posted by Polwart

I think you meant 1-1.5 L per mile - not L per hr that would be nice!

Thats our normal fuel consumption

















On the yacht

But yes litres per mile

Pete

[Poly]

Originally Posted by Pete7

Thats our normal fuel consumption

On the yacht

But yes litres per mile

Pete

Is that diesel consumption in the engine or red wine in the crew