Volvo Penta 18 hp

[sur-la-mer]

Folks are right, useless question without model code or pictures.

Check the usually cast iron exhaust elbow, they explode (corrosion, possibly ice?) and are very expensive to replace or unobtainable ... though can be replaced with standard fitting BSP gas pipe parts.

Otherwise, if it is, suck your teeth and tell the owner its costs £400 to replace and knock him down a bit. Which is OEM price, and what some people ask for swish stainless replacements.

 

[Stemar]

Keypart will post you an elbow for the 200X series for change from £200

 

[sur-la-mer]

I thought we were trying to get the price down for him?

There really are companies that sell them for £350 plus extras and shipping.

BSP pipe and well .... less than £50 and you'll be able to route it further back to your exhaust outlet. It's just good to know the thread is standard and you can buy 45°, 90°, Ys and so on, from your local plumbing supplies. 1-1/2" from memory.

 

[MJWB]

I thought we were trying to get the price down for him?

There really are companies that sell them for £350 plus extras and shipping.

BSP pipe and well .... less than £50 and you'll be able to route it further back to your exhaust outlet. It's just good to know the thread is standard and you can buy 45°, 90°, Ys and so on, from your local plumbing supplies. 1-1/2" from memory.

Oh my. Thanks for your help but you're now talking a language I, as a non engineering type, just don't understand. If you have a few mins please exlain as I'd like to know

 

[sur-la-mer]

BSP is the name of a kind of thread, like UNC, or NTP. It stands for British Standard Pipe. It's a sealing thread.

Size -24 or 1-½" fits the Volvo fittings I have had but, truth be, I've not worked on the Perkins made Volvos. The parts numbers appear to match up.

Volvo made the early MD water-cooled exhaust bends in two forms one that allows the rubberised exhaust pipe extension to fit directly on it. Another that allow more metal pipes to be screwed into it, to make a longer run of solid metal pipe depending on boat.

You can buy brass, A4 (316 marine grade) stainless, or plain cast iron ones and make up your own exhaust system cheaply.

Or if you see a good one on Ebay for less than £100, buy it.

The body where the water and hot gas blows, and the where the pipe attaches crumbles to pieces.

 

[erich27]

We had a Sigma33 with a Volvo 2002 from the early 80s and proved to be a good reliable engine, economical and easy to service. Still going strong, without a major overhauls and made it all the way to lanzarote to enjoy retirement!
Good luck

 

[sur-la-mer]

Volvo Penta 18 hp. Boat is 30 years old so engine the same

What boat is it, if you say it is original, we should be able to work out from there.

If you say, early 1990s, it could be a 200x series or a 20xx series (x being variable). There's a long list by years, here.

There's a sad truth that in the 4 figure bracket of boats, a boat is probably only worth what the engine is. "You buy the engine, and get the boat for free". Meaning that if the engine is on its way out or gone, as many are, you're looking asking price less 4/5 thousand plus (which is often nothing or a negative), or looking at it the other way, on top to replace it which is why people sell and get out, or buy another boat that someone else, in a flush of enthusiasm, paid that price. Or resign themselves to hanging an outboard on it.

You've got to really want to re-engine a smaller vintage GRP boat because its like crossing the Styx. No way to avoid paying the boatman. It's not a rational decision (tell me about it, I made it!).

In order of preference, I'd take a 20xx or an older single figure MD (eg MD7), over a 200x series. But a re-engined boat before either. The additional price of an already re-engined/refurbed boat will only be a fraction of the cost of doing so yourself. Early 200x series had engine/gearbox spline issues.

For the Perkin rebadged Volvos, you can get Perkins spares cheaper.

 

[Quandary]

I think with Scotties help we have established that it is a sea water cooled 2002 from close to the end of the long run of that series, no need to confuse the Op with stuff about 2020s. Not really a lot to go wrong and most common parts available.
A well maintained and cared for boat is what this buyer needs, the attitude of the previous owner is as important as any of the other details.

 

[MJWB]

Okay all thanks. I know it is a 2002 now. 30 years old. To my untrained eye and only seen pics so far (COVID lockdown ish getting in the way). I believe it has been well maintained for the last 10 years at least. However I'm realistic, could be good or might not be. And one can luck in or luck out.

So this is my first go. I'd like to get the engine checked as it's oldish, not been in the water for a bit (not run) and carries some risk with it.

Anybody know of someone who would inspect and report on such an engine in the Yorkshire or northeast area?
Any body got any idea what that might cost?
I've been scouting about on the net and apart from flashy looking companies who will no doubt cost the earth, I'm a bit stuck.

Thanks for you continuing help.