Volvo penta d4 throttle potentiometer - bosch equivalent.

[julians]

Volvo penta d series throttle potentiometer - bosch equivalent.

So for the last few years I've had an intermittent fault thrown on my vp d4 260 evc b engine. The fault code was 2.9.9, which according to the manual means internal evc fault. The symptoms of the fault were that seemingly at random and at any revs etc, the drive would shift into neutral, the revs counter would show 0 revs (but the engine was still running), the fault buzzer would sound a continuous tone, and the throttle itself would become completely inoperable, ie you could move the lever but nothing would happen. To clear the fault I would just turn the engine off, wait 10 secs or so and then turn it back on again. Everything would then work perfectly until the next time the error occurred. In total the fault showed itself maybe 10 times over about 200 hours run, but was starting to get more frequent.

Anyway, I had a volvo engineer plug his vodia laptop into the engine and the only fault recorded was an issue with the throttle potentiometer. So I picked one up from the local volvo dealer, fitted it myself and it seems (touch wood) to have fixed the issue.

However I noticed that the potentiometer itself is just a standard bosch part, and available online for around £10-15 (versus around 90 quid from volvo).

So if anyone needs a new potentiometer for their d series evc throttle (the black unit with the chrome lever with the black ball on top) the bosch part number is 0-280-122-001, the volvo part number is 1336385

 

[Assassin]

Re: Volvo penta d series throttle potentiometer - bosch equivalent.

Bosch are primary or secondary suppliers to many manufacturers and not just marine as they do many other replacement components for other makes such as Valeo and many others.

They have a number of warehouses around the UK and a call to one of these warehouses can reveal a considerable amount of information and we use them regularly to replace other components from other manufacturers.

In 2015 a friend who along with his brother, run a farm and agricultural business selling agricultural equipment also sold new tractors and two of the marques were getting regular problems with transmission sender probes self destructing and while they came with three years warranty the senders and other peripherals weren't covered and the owners had to pay £97 + VAT for the sender and the labour of 2 hours for replacement as the cab had to be lifted. I contacted our local Bosch warehouse and they informed me they weren't OE suppliers, but they kept them in for their replacement parts section and they were £4 + VAT each or £3.12 each for a box of 25 units, and they came with a 3 year warranty.

There were slight differences, the OE items had their wires terminating at the top of the sender through a plastic moulding and it was this which necessitated lifting the cab to get them out while the Bosch unit omitted this extra height by doing away with the plastic moulding and their wires exited through the side, and to date they retrofit every new tractor of these marques with the Bosch senders and you can replace them without lifting the cab, and not one of the Bosch units to date, has failed.

 

[petem]

Re: Volvo penta d series throttle potentiometer - bosch equivalent.

We could have told you that, all you needed to do was ask!

But it's a good reminder, perhaps at that price it's one for the spares box (could be the difference between a Volvo Penta Service Centre €500 repair and a £25 job)?

 

[julians]

So, the new throttle potentiometer didn't fix my intermittent 'internal evc error' fault that keeps getting thrown every now and again.

Any ideas what else could cause this? All connectors between throttle and hcu look clean and free of corrosion. Haven't had a look at the engine end of the evc system yet though.

 

[julians]

The connections into the pcu all look clean too.

Any ideas?

 

[jrudge]

To resurrect this post!

I need to change one potentiometer. I will order the part.

was the throttle body difficult to disassemble ?

thanks

 

[julians]

To resurrect this post!

I need to change one potentiometer. I will order the part.

was the throttle body difficult to disassemble ?

thanks

It's easy to disassemble if you can get to the back of the bolts that fix it to the dash.

There are a few small fragile looking plastic parts in the mechanism,don't break or lose these otherwise you'll need a whole new throttle.

 

[petem]

I was going to say the same as Julian. Do it wrong and you'll be posting for details of people who can 3dprint little cogs / gears!

I replaced both potentiometers last winter but left it to the pros along with some other jobs. The total bill wasn't that much so it can't have been that hard.

@jrudge what's wrong with yours?

 

[jrudge]

It's easy to disassemble if you can get to the back of the bolts that fix it to the dash.

There are a few small fragile looking plastic parts in the mechanism,don't break or lose these otherwise you'll need a whole new throttle.

Getting out out is no issue ( upper helm ). Will be careful.

if it looks too hard I will give up !

the port throttle will calibrate but then the idle click reverse needs a small extra nudge to go into gear. It is not time related just need a tiny extra movement.

I assume the potentiometer is worn slightly.

Pete. Why did you change yours ?

 

[petem]

Getting out out is no issue ( upper helm ). Will be careful.

if it looks too hard I will give up !

the port throttle will calibrate but then the idle click reverse needs a small extra nudge to go into gear. It is not time related just need a tiny extra movement.

I assume the potentiometer is worn slightly.

Pete. Why did you change yours ?

We had an issue where it was sticking in gear.

In the end we replaced the potentiometer, the gear cables and the clutch cone. Did the trick.

Occasionally, you get an issue where it's worth just chucking parts at it (IMO).