Search found 4951 matches

by Charles uk
Wed Jun 01, 2022 12:36 am
Forum: For Sale
Topic: Racing Boat?
Replies: 2
Views: 4502

Re: Racing Boat?

Oh no he wouldn't !!

Too heavy!
by Charles uk
Tue May 31, 2022 7:42 am
Forum: Wanted
Topic: Mallard-Coventry Apex
Replies: 4
Views: 5507

Re: Mallard-Coventry Apex

Private mess.age sent
by Charles uk
Tue May 03, 2022 9:28 pm
Forum: Help
Topic: fixing two Century (or at least one)
Replies: 49
Views: 78464

Re: fixing two Century (or at least one)

Never weld crankcases without having both halves bolted together, helps prevents distortion. Reassemble the crank & the 2 crankcase halves, oil the main bearings, check they mate properly, very small gaps can be sealed using RTV silicon as a gasket paste & rotate the crank to ensure it rotat...
by Charles uk
Tue Apr 19, 2022 10:53 pm
Forum: General Topics
Topic: Forty featherweight gearbox
Replies: 2
Views: 4847

Re: Forty featherweight gearbox

1/4 BSF, somewhere on here is a post containing all the thread sizes.
by Charles uk
Tue Apr 19, 2022 4:43 pm
Forum: General Topics
Topic: Something happened
Replies: 40
Views: 42832

Re: Something happened

Leaking oil or grease are a symptom of worn bearings or prop shaft.
by Charles uk
Wed Apr 13, 2022 7:08 am
Forum: General Topics
Topic: Surviving the Seagull
Replies: 3
Views: 6842

Re: Surviving the Seagull

https://www.sailingscuttlebutt.com/2022 ... board-era/
Doesn't seem to work when I try, is it me?
by Charles uk
Fri Feb 25, 2022 3:12 pm
Forum: Other Old Outboards (Non-Seagulls)
Topic: Mercury 3.3hp No Tell Tale Water
Replies: 15
Views: 28907

Re: Mercury 3.3hp No Tell Tale Water

Rubber water pump impeller so back pressure shouldn't be a problem.

Have you checked the water delivery tube between the powerhead & the cylinder?
by Charles uk
Mon Feb 14, 2022 1:06 pm
Forum: General Topics
Topic: HP and Thrust
Replies: 11
Views: 12257

Re: HP and Thrust

No comparison figures in that tech report only push in newtons!

You can't help wondering why they didn't try a height adjusting bracket for the long shaft Kingfisher, if they could measure a short shaft Kingfisher without major problems?
by Charles uk
Sun Feb 13, 2022 5:41 pm
Forum: General Topics
Topic: HP and Thrust
Replies: 11
Views: 12257

Re: HP and Thrust

2022-02-13-0002-min.jpg 2022-02-13-0003-min.jpg 2022-02-13-0001-min.jpg Perhaps the above might explain better what I'm trying to say, it was taken from a Seagull technical report S87 dated (01.09.88) unfortunately Doug Hele passed away some time ago, so it's no longer possible to pick his brain on...
by Charles uk
Sat Feb 12, 2022 6:06 pm
Forum: General Topics
Topic: HP and Thrust
Replies: 11
Views: 12257

Re: HP and Thrust

Doesn't 10% more firing strokes, imply your putting 10% more power into the water that's used to propel your boat forward? (How much push your getting on the back of your boat). As measuring the power output at less than maximum revs in it's normal working environment, would give you a lower inaccur...
by Charles uk
Fri Feb 11, 2022 11:30 pm
Forum: General Topics
Topic: HP and Thrust
Replies: 11
Views: 12257

Re: HP and Thrust

Measure the revs at full throttle of a static bollard & full throttle in open water.

You'll find your getting more revs going free, more revs means more power strokes = higher push!
by Charles uk
Fri Feb 11, 2022 10:49 am
Forum: General Topics
Topic: HP and Thrust
Replies: 11
Views: 12257

Re: HP and Thrust

Yes Seagull did, but not a static bollard pull, they had in the late 1980's a transom bracket with a set of scales built into it, so they could measure the thrust at the higher revs when under way. Which was higher than the static bollard pull & more representative of the results that a customer...
by Charles uk
Tue Feb 08, 2022 9:14 am
Forum: Help
Topic: Steel Head and Base Plates
Replies: 6
Views: 8078

Re: Steel Head and Base Plates

Can you give us the engine number from your 40 so we can let you know if it's a model that requires the steel gaskets.
by Charles uk
Fri Jan 21, 2022 9:19 am
Forum: General Topics
Topic: Missing Word In Old Decal
Replies: 4
Views: 6086

Re: Missing Word In Old Decal

The answer your looking for is 0.8 of a US pint to 1 US gallon.
by Charles uk
Sat Dec 18, 2021 5:42 pm
Forum: General Topics
Topic: Nuts and bolts
Replies: 5
Views: 7227

Re: Nuts and bolts

It would help whoever answers your question if we knew which model & exactly which nuts you want (photo & serial number).