Jump to content

SR2 smoking


claudia

Featured Posts

ok, Ive let curiosity win ,MY injecter is like yours claudia BUT its got a finned sleeve and an O ring 65 mm from the sealing washer.It is a pintle type CAV BKB82SD52488

DN5449502 OK

 

on the other side punched in is ABB

1137

0 JNR

your injecter would deffo fit in my LR,s head

Let the experts ponder,Best Wishes,

Robin

Link to comment
Share on other sites

They are very similar numbers to mine Robin and I do appreciate your efforts, there is nothing on the other side of mine.I know I am not allowed to assume but if I base it on the lesser of the two engines will I not be covered for all eventualities?

Link to comment
Share on other sites

They are very similar numbers to mine Robin and I do appreciate your efforts, there is nothing on the other side of mine.I know I am not allowed to assume but if I base it on the lesser of the two engines will I not be covered for all eventualities?

 

Have you asked ChrisB or a fuel injection specialist which engine your injectors belong to? Shouldn't cost more than an email or a visit and would more or less settle the issue. I think it's only the BKB.... numbers which are relevant.

 

Tim

Link to comment
Share on other sites

They are very similar numbers to mine Robin and I do appreciate your efforts, there is nothing on the other side of mine.I know I am not allowed to assume but if I base it on the lesser of the two engines will I not be covered for all eventualities?

Yes with an air cooled engine which can overheat easily its better to be slightly underpropped than over.

I have propeller charts for displacement boats for all different engine powers,RPM and gear reductions.If you give me the boats length, rough weight and the diameter and pitch of your presant propeller i can work out an average compromise pitch which will cover the lower power and revs engine but it would take some swotting time as there are a number of variables.But a propeller maker such as Crowther fed with that information can do the same and being as you bought it from them i would think would reduce the pitch for you at minimal cost if sent back to them.

Link to comment
Share on other sites

Here for everybody (but esp. for Ian and Claudia) are the numbers for all 2cyl Listers appropriate to this discussion.

We'll eventually identify Claudia's lump and we will ALL know more as a result.

We already know it's an air-cooled Lister? two cyls? runs as sweet as a nut?

probably less than 1150 ccs ( and therefore not an ST)?

And it's 'probably' not an SR2 because to run that sweet and not push the prop while underway

it 'probably' has less than 11bhp?

 

Model Cyls Cap(cc) Bore/Str MAX BHP @ RPM Cool Wt Fuel

The odd formatting is because of hidden control characters

whose amazing power I've tried to overcome with limited success.

LD2----- 2-- 811---- 3 X 3.5-----7 @ 1800 Air 408lb Diesel

LD2M-- 2-- 811---- 3 X 3.5-----7 @ 1800 Air 515lb Diesel

 

LR2----- 2-- 811--- 3 X 3.5-----10.5 @ 2500 Air 405lb Diesel

LR2M-- 2-- 811---- 3 X 3.5-----10.5 @ 2500 Air 530lb Diesel

 

SL2----- 2-- 915--- 3.1875 X 3.5--- 9.5 @ 2000 Air 408lb Diesel

SL2M-- 2-- 915---- 3.1875 X 3.5---- 9.5 @ 2000 Air 515lb Diesel

 

SR2----- 2-- 1103--- 3.5 X 3.5--- 15.5 @ 2500 Air 416lb Diesel

SR2M-- 2-- 1103--- 3.5 X 3.5---13 @ 2000 Air 635lb Diesel

 

The "M" suffix means 'marine. Quite how you marinise an air-cooled engine I can't say

but my (alleged) SR2M seems to have a lost a little power in the so doing.

 

(EDIT: Apparently power curves of both Srs are similar! marine is set to operate at lower revs than the mixer and tweaked to give optimum BHP at the revs where it runs best.

Edited by Pentargon
Link to comment
Share on other sites

Just to throw another item into the pot. The engine has has a new SR2 lifter pump fitted. Are the pumps the same for all the engine combinations that are being listed as the possible engine in the boat?
I've just looked over your brilliant album of 26 SR2 build pictures. Thanks for sharing what is a very valuable resource.

 

Provisional answer to your pump question because I don't yet know even my own engine properly. It's very likely the lift pump, which is set into the block in mine, would be the same across the range we are lookin at here on the basis that block castings are likely to be the same. My area of expertise is BMC A-series engines and any (mechanical) from any A-series engine fits all others.

Link to comment
Share on other sites

They are very similar numbers to mine Robin and I do appreciate your efforts, there is nothing on the other side of mine.I know I am not allowed to assume but if I base it on the lesser of the two engines will I not be covered for all eventualities?

 

To some extent you are correct but what you should bear in mind is that, whichever engine you look as though you've got, it is relatively low powered. By re-pitching your existing SR sized prop you risk having to set the pitch quite fine as you aren't changing the diameter in that case. Fine pitched props with low power engines will tend to give slow acceleration, and perhaps more importantly poor stopping power.

If you get a fresh recommendation from Crowthers based on the correct engine then you can make an evidence based decision as to which route to go based on the new figures. It may be that they will recommend keeping the same dia. prop but until you see those recommendations you won't really know.

Roger

Link to comment
Share on other sites

I've just looked over your brilliant album of 26 SR2 build pictures. Thanks for sharing what is a very valuable resource.

 

Provisional answer to your pump question because I don't yet know even my own engine properly. It's very likely the lift pump, which is set into the block in mine, would be the same across the range we are lookin at here on the basis that block castings are likely to be the same. My area of expertise is BMC A-series engines and any (mechanical) from any A-series engine fits all others.

 

My pleasure.

The project included stripping, bead blasting and painting all external suffices. All wear surfaces were checked, but not a single surface had worn beyond manufacturers tolerances.

Link to comment
Share on other sites

According to my old Lister manual the fuel lift pumps are the same on both SR and LR and almost certainly the SL too.

Ian Les said that he didn't see much smoke from your engine so there's an outside chance its under fueling. I personally would try the governor plate ''stop''override adjustment as i described way back as it can make a big difference it reduces the slight stop push pressure on the lightweight rack compression springs and allows a bit more fuel to be injected.I know its a long shot and we have determined that you have one of the lesser powered engines and that it is over propped but well ''yer never know''.It takes seconds to alter it and you have nothing to lose by trying it. I have done this as a quick fix on an SR2 with almost identical symptoms as yours, which had a governor mechanism fault which i couldn't access easily.

Link to comment
Share on other sites

Slightly off topic ,but My boat I have deliberately overpropped so that i have a really lazy sound and even dump a injecter pump via the cam lever when I want to go real slow.In my case it works, a 16 hp engine at 300 revs just pootles along.

But I add an outboard motor when I push the Tidal rivers,ie the Thames,Trent,Severn estrury,Bristol channel and Medway

If you had the room you could always add another LR 1,they are dirt cheap,ex mixer,scrap price 25 squids.THEN you would have an LR3.Cool or what eh??

Lateral thinking.

Robin

Link to comment
Share on other sites

Sorry, to late, or I would have swopped. :rolleyes:

 

Hah! You're in there with me, Les. I'd have ian's engine for a spare anytime. Does your 'new' one sound as good as his did on the video? :rolleyes:

 

Slightly off topic ,but My boat I have deliberately overpropped so that i have a really lazy sound and even dump a injecter pump via the cam lever when I want to go real slow.In my case it works, a 16 hp engine at 300 revs just pootles along.

But I add an outboard motor when I push the Tidal rivers,ie the Thames,Trent,Severn estrury,Bristol channel and Medway

If you had the room you could always add another LR 1,they are dirt cheap,ex mixer,scrap price 25 squids.THEN you would have an LR3.Cool or what eh?? Lateral thinking. Robin

 

Would you run them in line or stacked or have you a devious transverse [or lateral] plan? :smiley_offtopic: I know! I know! But we listerines can take it? :blink:

Link to comment
Share on other sites

:smiley_offtopic: I am in hallowed waters as I am a Petter Pusher(PH2)

One of my friends has chaindriven his Kromhout,so anithing is posible whatever configuration takes yer fancy :wub:

Tractors (competition sled pullers)seem to fit multiple allisons/merlins all over the place!!

Robin

to pentargon

Edited by Springer Skipper
Link to comment
Share on other sites

Now I think we are getting silly Robin what would the ducks say to a tractor pull engined narrow boat. Thanks Les for that mine sort of pulls it through the water but it does sound very nice. Just wondering Bizzard if you have something there because under fueling is what Les was sort of thinking when he was tinkering not the engineering term I know, he did expect more fuel from the leak off.

Link to comment
Share on other sites

Now I think we are getting silly Robin what would the ducks say to a tractor pull engined narrow boat. Thanks Les for that mine sort of pulls it through the water but it does sound very nice. Just wondering Bizzard if you have something there because under fueling is what Les was sort of thinking when he was tinkering not the engineering term I know, he did expect more fuel from the leak off.

Yes there should be a reasonable dribble from the leak off,as its this that helps keep the injectors cool and without it they will overheat and give trouble especially as they're more or less in the engine under the valve covers on your engine,they are off course also cooled by the air blown through the cylinder head fins by the fly-wheel fan but that wouldn't be enough i wouldn't think.

Link to comment
Share on other sites

Now I think we are getting silly Robin what would the ducks say to a tractor pull engined narrow boat. Thanks Les for that mine sort of pulls it through the water but it does sound very nice. Just wondering Bizzard if you have something there because under fueling is what Les was sort of thinking when he was tinkering not the engineering term I know, he did expect more fuel from the leak off.

 

That has given me an idea. The fuel tank is just high enough to give some gravity feed, what if the new lift pump is in fact faulty. That may just be enough for fuel to feed the engine under no load but struggle with a new full size prop. Have you tried the old pump back on? This may sound silly but did you make sure the pump tappet (small rod) was in place before the new pump was fitted. I know I have been caught out with dafter things before now.

Link to comment
Share on other sites

That has given me an idea. The fuel tank is just high enough to give some gravity feed, what if the new lift pump is in fact faulty. That may just be enough for fuel to feed the engine under no load but struggle with a new full size prop. Have you tried the old pump back on? This may sound silly but did you make sure the pump tappet (small rod) was in place before the new pump was fitted. I know I have been caught out with dafter things before now.

If you undo the outlet pipe of the lift pump and turn the engine over there should be strong spurts of fuel every second revolution of the crankshaft.

Link to comment
Share on other sites

Yes there should be a reasonable dribble from the leak off,as its this that helps keep the injectors cool and without it they will overheat and give trouble especially as they're more or less in the engine under the valve covers on your engine,they are off course also cooled by the air blown through the cylinder head fins by the fly-wheel fan but that wouldn't be enough i wouldn't think.

 

I don't believe that to be the case, injectors with new or 'as new' nozzles will often leak almost nothing, such a small amount that I can't believe it has any significant cooling effect.

 

Tim

Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue.