Search found 4842 matches

by Charles uk
Sun Oct 11, 2020 6:44 pm
Forum: General Topics
Topic: Code question
Replies: 3
Views: 2436

Re: Code question

If you look closely at the WO Ed, they are not the same font as the SJM, which to me would imply that they were not stamped at the same time as the serial number, possibly they represent the owners initials.

SJM 324 = 55-56 forty minus.
by Charles uk
Sat Oct 10, 2020 3:46 pm
Forum: Help
Topic: help Silver Century/90/Osprey dyeing
Replies: 11
Views: 3386

Re: help Silver Century/90/Osprey dyeing

Between 1937 & 1994 circa 1,000,000 Seagulls were produced, allowing for the ones that were exported, would leave you with around 1 Seagull produced for every 100 members of our population! Have a walk around your local boatyard & ask all the staff how many Seagulls they have in their sheds? Then pu...
by Charles uk
Sat Oct 10, 2020 1:33 pm
Forum: Help
Topic: help Silver Century/90/Osprey dyeing
Replies: 11
Views: 3386

Re: help Silver Century/90/Osprey dyeing

A 25:1 main jet has the smallest size hole of all the jets, as the fuel with the least oil content has a lower viscosity decreasing the oil content of your fuel mix will make your current jet pass more fuel, is that what your trying to achieve? Remember your Seagull is close to it's 50 birthday & yo...
by Charles uk
Sat Oct 10, 2020 11:57 am
Forum: Help
Topic: help Silver Century/90/Osprey dyeing
Replies: 11
Views: 3386

Re: help Silver Century/90/Osprey dyeing

You have as never-outbored says a Silver Century, which should have an Amal twin jet 46N carb which has as the name suggests 2 jets. The jet you've given us the size from, was the economy jet & they are all size 25, the important one that we want the number of & corresponds with the fuel mix, is the...
by Charles uk
Sat Oct 10, 2020 9:10 am
Forum: Help
Topic: help Silver Century/90/Osprey dyeing
Replies: 11
Views: 3386

Re: help Silver Century/90/Osprey dyeing

Your serial number will help to identify exactly which model your talking about.
by Charles uk
Thu Oct 08, 2020 9:50 pm
Forum: General Topics
Topic: QB series
Replies: 6
Views: 3421

Re: QB series

I've had 3 Seagull 5's (Osprey) only one had a 420 the other 2 had a pumped 416 4 which takes the larger needle valve

It's a very easy upgrade to get a bit more ooomph!
by Charles uk
Sun Oct 04, 2020 10:51 pm
Forum: The Discussion
Topic: Starting in Reverse?
Replies: 15
Views: 16629

Re: Starting in Reverse?

There is the small problem of the spark instead of being 23 degrees before top dead centre, being 23 degrees after on a Seagull rotating in the wrong direction. Meaning most of the fuel/air charge shouldn't have enough time to combust before the exhaust port opens. Perhaps someone should try startin...
by Charles uk
Sat Oct 03, 2020 12:57 am
Forum: General Topics
Topic: 416 carby question
Replies: 5
Views: 3189

Re: 416 carby question

Is that the air inlet re-stricter for the emulsion tube?
by Charles uk
Fri Oct 02, 2020 5:58 pm
Forum: General Topics
Topic: 416 carby question
Replies: 5
Views: 3189

Re: 416 carby question

Try removing the jet from a 400 series carb. You will see in the bottom end of the hexagonal jet a hole in the side to permit fuel entry & in the centre a small hole (circa 1mm dependant on the jet size stamped on one of the flats) this allows a metered amount of fuel into the emulsion tube above th...
by Charles uk
Sat Sep 26, 2020 12:32 am
Forum: Help
Topic: Removing Driveshaft Collar Pin
Replies: 5
Views: 2809

Re: Removing Driveshaft Collar Pin

I think you'll find 3 different types of pin, part number 1412, brass, softish stainless steel & a steel roll pin, all about 1" long & 3/16 diameter. The roll pin comes out easy if not too rusty. The brass one is the most difficult as the ends seem to flair out big time & can require careful drillin...
by Charles uk
Sun Sep 20, 2020 7:46 am
Forum: Help
Topic: hot drive shaft tube
Replies: 6
Views: 2362

Re: hot drive shaft tube

I'll wager some of your crankshaft will have turned blue, from the heat, has anyone got a pic to illustrate?
by Charles uk
Sun Sep 20, 2020 12:55 am
Forum: Help
Topic: hot drive shaft tube
Replies: 6
Views: 2362

Re: hot drive shaft tube

That sounds like friction from the bottom main bearing, might be slack or bent crank.

Crankshaft end float of between (50 to 100 thou) is a standard feature .

Check out John Williams or ebay a good 102 crankcase & crank won't be expensive.
by Charles uk
Sat Sep 19, 2020 9:42 am
Forum: Help
Topic: hot drive shaft tube
Replies: 6
Views: 2362

Re: hot drive shaft tube

Where does the hot gas come from & which locating screw?

Are you running 25:1 or 10:1 fuel mix ?
by Charles uk
Wed Sep 16, 2020 5:29 pm
Forum: General Topics
Topic: L&L Manufacturing S1 carb on 102
Replies: 3
Views: 2665

Re: L&L Manufacturing S1 carb on 102

All 102's were fitted with an Amal 46 twin jet carb, heaps of pics on here.

Except a few very late models (post late 80's)that were fitted with an Amal 416 concentric float carb & CDI ignition.
by Charles uk
Sun Sep 06, 2020 2:53 pm
Forum: General Topics
Topic: Prop shaft diameters / thrust washer compatibility
Replies: 2
Views: 2007

Re: Prop shaft diameters / thrust washer compatibility

All of the classic prop shafts are the same diameter, 1/2" & there are 3 different thickness hardened steel thrust washers so that adjustments can be made to ensure the crown wheel & pinion teeth mesh quietly & properly!