HI will a 1 piece 102 block fit on a wspcl century plus?
are all the blocks/pistons/cranks/crankcases interchangeable on the bigger models?
102 BLOCK/CRANK?.....INTERCHANGEABLE?
Moderators: John@sos, charlesp, Charles uk, RickUK, Petergalileo
No not really is the answer to both questions.
Various people have indeed fitted a 102 block with a bit of jiggling and cursing to a Century gearbox, but there are a few barriers to success.
Cooling is one of them, I suppose you could run the outlet down into a Century exhaust, or even just let it dribble away.
Tank fixing is another - maybe you'd be better using the 102 tank and its lugs and straps.
But generally it's a bit of a kludge.
The pistons and cranks from the long water jacket 102 right through all the Centuries are the same, and the crankcase is similar. But of course that's not true of the 170' and QBs
Various people have indeed fitted a 102 block with a bit of jiggling and cursing to a Century gearbox, but there are a few barriers to success.
Cooling is one of them, I suppose you could run the outlet down into a Century exhaust, or even just let it dribble away.
Tank fixing is another - maybe you'd be better using the 102 tank and its lugs and straps.
But generally it's a bit of a kludge.
The pistons and cranks from the long water jacket 102 right through all the Centuries are the same, and the crankcase is similar. But of course that's not true of the 170' and QBs
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Charles UK
I think you will find that some of the later CDI crank shafts
Never seen one as new as that!
its my fault i actualy ment putting the round head block onto the centry crankcase/crank...but i see it should be ok.
as to putting the old 102 powerhead onto a centry plus gearbox/complete bottom end] i must say that i didnt have a problem...no cursing at all [but maybe a bit of jugling]
...i find it amazing that good old seagull didnt play around with the fixing dimentions too much 
Never seen one as new as that!
its my fault i actualy ment putting the round head block onto the centry crankcase/crank...but i see it should be ok.
as to putting the old 102 powerhead onto a centry plus gearbox/complete bottom end] i must say that i didnt have a problem...no cursing at all [but maybe a bit of jugling]
...i find it amazing that good old seagull didnt play around with the fixing dimentions too much -
Charles UK
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40TPI
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- Joined: Fri Jan 26, 2007 7:08 pm
- Location: North Buckinghamshire, 110 miles south of Yorkshire, England.
For a similar example of the proposed marriage look at :
http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... :IT&ih=005
Well nearly. This 102 block seems to have been mated with at least the bottom of an EFNR ..... possibly even the crank/case/piston. Water outlet arrangements not visible. And thoughtfully has the original leg included alongside for those contemplating a forced divorce.
Sadly I have a suspicion that the EFNR box may generate more interest than the rest of the motor.
I'd be curious to know what is stamped on the crankcase.
Peter
http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... :IT&ih=005
Well nearly. This 102 block seems to have been mated with at least the bottom of an EFNR ..... possibly even the crank/case/piston. Water outlet arrangements not visible. And thoughtfully has the original leg included alongside for those contemplating a forced divorce.
Sadly I have a suspicion that the EFNR box may generate more interest than the rest of the motor.
I'd be curious to know what is stamped on the crankcase.
Peter
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Charles UK
That probably has the original crankcase & points ignition & a prop that does not look like a model 90 prop, Rick you've just rebuilt one am I right?
The two props are not interchangeable, the 102 spring is on the outside & the FNR one on the inside.
My guess on the serial is AC or TC but that looks like a Wipac ignition with an early fuel cap, a bitsa.
The two props are not interchangeable, the 102 spring is on the outside & the FNR one on the inside.
My guess on the serial is AC or TC but that looks like a Wipac ignition with an early fuel cap, a bitsa.
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40TPI
- Posts: 451
- Joined: Fri Jan 26, 2007 7:08 pm
- Location: North Buckinghamshire, 110 miles south of Yorkshire, England.
The serial number has been put up as WHCL 686K2. Intriguing! As a late 1972 motor it is right at the end of the last declared 102 batch and that could make the Wipac ignition, plastic petrol cap and bronze flywheel original..... And maybe also the exhaust but we can't see the back view. Bet the crankcase halves as well as the crank and piston came out of the Silver Century bin... Probably much less of a bitsa than first thought. . Definitely not the headlined 1946 era but an intriguing motor nevertheless.
Peter
Peter
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Charles UK
The FNR lower unit only has a value if you have the same motor that this unit was taken from.
If the unit was taken from a 170, Osprey or a Kingfisher, a Century or a 102 will not have enough umph to turn such a large prop.
The other Charles & myself have often discussed taking pictures of the whole range of Seagull props so that any prop can be identified & matched up with the motor it was designed to run on, to this end we need a target marked out with circles that get bigger in 1" diameter increments,
So that both of us can photograph all our props sitting in the middle of the target which will show the shape & number of blades & the diameter, where known we will also list the pitch.
The largest diameter needed will be for the 102+ prop at 13 inches.
If anyone out there has the ability to draw & print a 13" diameter cricle please PM either of us so we can commence preparation for this mamoth task as there must be 40 or more different props in the British Seagull catalogue.
If the unit was taken from a 170, Osprey or a Kingfisher, a Century or a 102 will not have enough umph to turn such a large prop.
The other Charles & myself have often discussed taking pictures of the whole range of Seagull props so that any prop can be identified & matched up with the motor it was designed to run on, to this end we need a target marked out with circles that get bigger in 1" diameter increments,
So that both of us can photograph all our props sitting in the middle of the target which will show the shape & number of blades & the diameter, where known we will also list the pitch.
The largest diameter needed will be for the 102+ prop at 13 inches.
If anyone out there has the ability to draw & print a 13" diameter cricle please PM either of us so we can commence preparation for this mamoth task as there must be 40 or more different props in the British Seagull catalogue.