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Messages - Fred2

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Petteroids / Re: Petter piston shaft movement?, model type? & Hi
« on: December 13, 2012, 03:57:04 PM »
Hi and thanks for replys.

We spotted something called a FUEL LIFT PUMP in the handbook for the AC1, but it doesn't explain what it does that isn't done by the standard engine fueling components. One isn't fitted to our AC1 engine. So, if it isn't fitted as standard what does the FUEL LIFT PUMP do exactly? Can anyone tell us....

Metric dimesnions and common sizes for the g/box bearings sounds very handy. But I'm wondering how I will communicate what I need to a supplier of those... would the dimensions of the bearings and seals be stamped/printed on the items themselves in the g/box?

When you say bearings, would those be white metal shell bearings like those around the crank shaft... or are we talking balls or rollers in cage races, or something like that?

Thanks to for posting link to the one on ebay. 15 bids so far looks like it might push the price up though.

Hope your xmas plans are coming along, Listard and others. :)

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Petteroids / Re: Petter piston shaft movement?, model type? & Hi
« on: December 08, 2012, 12:47:19 PM »
Good news on ease of separation for g/box. Wasn't looking forward to realigning complex parts!

How many and what sort of bearings (locations & type) should we expect in the gearbox? Our manual doesn't show it at all - probably because it's a non-petter type g/box. Same question I guess for the seals? What should we be looking for inside bearings and seals wise, to get replacements?

Thanks for the heads-up on the AC2W. Seen the pics etc. It doesn't seem much bigger than the Ac1 really,  but I'm guessing the weight of the former could be quite a bit more than the latter. Would you think it was?

When was the AC2W last run?

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Petteroids / Re: Petter piston shaft movement?, model type? & Hi
« on: December 01, 2012, 11:37:04 PM »
Thanks Listard for your specific and detailed replies.

Re the italian gearbox Petter used on the AC1 : can we simply unbolt it from the crankcase... or is there a danger of disloging or mis-aligning parts in the g/box or crankcase?  And If so, what precautions should we take first before separating the two?

Our g/box isn't slipping (not that we're aware of!), we just thought it would be prudent to think about parts for it before something breaks or wears out and we end up NEEDING them!   You mention you've not needed parts for your mini-six g/box... is yours the same as ours then... the italian forward/neutral/reverse type?

Thanks for all your points and pointers re the other issues; very helpful indeed in deciding what to do/tackle and what not to. It sounds like neither a direct injection modification, nor a watercooling modification will really be worth the cost or reap much benefit. If, as you describe, an indirect injection single-pot petter will be pretty noisy anyhow, and a direct injection version or 2 pot version of the AC will be even noisier, those options seem not worth pursuing.

Like Listard and DieselGman are helping here, I hope - if we stick with our AC1, that we can one day help others with our own practical experience of the engine. I've belonged to forums for other things and the level of discussion there was not as good as it is here.

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Petteroids / Re: Petter piston shaft movement?, model type? & Hi
« on: November 29, 2012, 03:05:16 PM »
Hi  Listard-jp2, and thanks for taking each of my questions in turn. Sorry for my slow response, I've been having some PC problems.

A series 1, that's worth knowing. Thanks. It's a shame that the data plate doesn't give a year of manufacture or a build number so that we can investigate which features/details it has and has not. I wonder why in this instance the data plate doesn't have that info? the manual says every data plate should list that info.

We've heard of the acW1 and 2, but our data plate doesn't include the 'W', just AC1. So, I'm guessing it wasn't designed to have the cylinder cooling. Although, if it was just the cylinder head that was different (with water in/out pipes), as ours is set up to run with a raw water pump already, perhaps we could get such a cylinder and have a quieter and cooler/smoother engine. Are those correct guesses and likely outcomes?

On the forum people talk of the direct top injector models (straight into the cylinder head top) being more reliable than the side injector model, like we have. If we just switched a top injector cylinder head for our side injector one, would that simply involve taking off the old head and bolting on the top injcetor head?

Drilling the allen cap screws sounds difficult. I'm guessing the allen screws are going to be hardened steel, not just aluminum. Do you guys know if the screws are hard metal to drill?. We'll keep trying the ordinary ways to get them lose, but it would be worth knowing if they're going to be hard to drill, just in case. Then we can get suitable drill bits.

Pleased to hear you say the gearbox we have is right for the engine model we have! (Have seen the same g/box now on a ?AC1 petter on utube - a newly gold painted engine running beautifully.) But I guess the parts for this Italian g/box aren't petter made... so where on earth would we find parts (eg: clutch plates)?

Thanks again.


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Petteroids / Re: Petter piston shaft movement?, model type? & Hi
« on: November 24, 2012, 02:44:35 PM »
Dieselgman : Hi. thanks for info on revs per minute. We were wondering how high our engine went in revs. Is that what produces the relatively high horsepower? We want to identify exactly what model we have as we were thinking of getting another identical engine to act as parts doner. And if the 2nd is a runner it would be a plus on the one we have, which came part dismantled. Surprised to hear so many in the US, we're in the land these were made and they turn up on ebay only occasionally. Will do as you suggest and remove the con rod, but so far the sump drain nut and other nuts are proving very difficult to remove. Any tips?

Listardjp2 : Hi, and thanks. We would have preferred the fully watercooled version, ours just has a raw water pump run from a pulley off the crankshaft extension and that water cools the exhaust not the head/cylinder. We're guessing it's a post production modification made by an enthusiast, as the cooled exhaust extension looks homemade (but solid). Our cylinder head isn't corroded and the iron cylinder looks fine. but I guess that's because we haven't got the water circulating there like the type you mention. Does that sound right?
Where were the sacrificial an nodes fixed?

Our gearbox(forward/neutral/reverse) has a data plate with only italian words on it. It bolts perfectly onto the main engine block, but does that sound like a petter make of gearbox? The petter manual refers to a "reduction" unit, by this do they mean a gearbox of their design?

The petter manual also shows a clutch device: does this just amount to being able to take the driveshaft off the flywheel into neutral?

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Petteroids / Petter piston shaft movement?, model type? & Hi
« on: November 23, 2012, 12:37:34 PM »
Hi, I'm a new member, so thought I'd introduce myself and say thanks for having this forum at all, and thanks to those who contribute.

A bit of background. A friend and I have just taken on a Petter AC1 6HP diesel.  It has been modified for propelling a boat, with water cooled exhaust and a forward/reverse gearbox.

So I hope it's ok to start the ball rolling with the following:

1/ the data plate only says Type: AC1.,  BS: 6.00,"  the engine number and then "AC1" again
The manual says there's should be a year of manufacture, rotation direction and a build number. But none of these are there.
HOW CAN WE FIND OUT THESE DETAILS...?   So we can get parts and understand the workings.
I think it is an indirect injection model, ie: the injection nozzle goes into the side of the cylinder head. Is this right..?
It also has an onboard electric starter motor.

2/ the cylinder head is off and the piston head removed. The piston connecting rod when wiggled has quite a bit of sideways movement (about 4mm or more)... does this mean the big end bearing needs replacing...?

3/ Mechanics have told us that "no one wants these any more". They recommended that "much better/modern alternatives" are available for the use ours has been put to. But the alternatives they recommend look too heavy for our 70 year old 1/2 ton wooden boat. In principle, we would much rather stay with the petter, not least because we like old tech, as opposed to new tech. But the mechanics made us doubt : will the petter be reliable? and will it power the boat at least adequately in up to moderate seas? Any input/experience you guys have, or have heard of, would be greatly appreciated.

Any thoughts..?

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