Saving Old Seagulls

I was thinking of the type with the head and cylinder cast in one... 55 psi is very low for cranking pressure ...you would get a more usefull reading if you spin it with a drill .. 100-120 would be normal on a modern engine ...I think Phil wanted to know the compression ratio not the cranking pressu...

to find compression ratio...bring piston to TDC and with a syringe add oil through the plug hole till its full......engine capacity divided by quantity of oil gives the compression ratio......you can then see how much weld you need to add to the underside of the cylinder head to raise the comp ..vol...

here we have a number of pit bike carbs advertised ..they are much lile amal with a slide for the throttle etc ...the 49cc ones may be ok as they only engage the clutch at 5500 rpm so the 100cc seagull will pull the same air volume at say 2500...there is also a 125 carb with a 20 mm outlet throat fo...

sounds like an easy job for coventry metalling and boring from what I have seen of there work on Jags etc

I suggest you send them to Coventry Metaling and Boring who specialise in recovering old cranks ..you dont say why they are unreparable but if its in the bearing areas these are the people to try ...sorry you have to try yellow pages ..these people are still in the 1930s

To stop the swarf apply compressed air continuously through the carb inlet and ass you drill the hole out it blows out the swarf ...same when you tap ..use greased tap and drill as well.....

well well well and you all laughed when I put a Suzuki carb on from a 200cc outboard....... Problem is as I see it is that due to the piston being the induction timing device ( rather than a reed valve or rotary valve) the air flow is highly pulsed and the suzuki carb did not like it . I could not r...

This pile of spares is just down the road from me .....tried to contact them in the past with no success .....dollar pound very bad about 2.15 dollars for your pound

collector inspector is at his riverside cabin for a few days...its holiday time here ....30 deg in the shade at 7.30 am today bet he took an Anzani.....!!!

Hang on mate 2 days to go yet .....!!!!

the general rule with twin prop installations is that you increase the pitch by 2 inches on each prop....only expect about a 25% increase in speed.

Bit like wedding photos ....by the time you get them everyone has lost interest .....

so what we are saying is its 88 miles up a particular river .....so we carnt duplicate this all over the world or even in england....

Is there not a class for a 1km or 1 mile two way dash ....dont remember Donald Cambell doing 88 miles in Bluebird !!

and it seems 25 mph is top wack .....

perhaps I missed something you all know about seagull racing ....first you aint going to get good speed unless you can get it on the plane ....are we saying not enough power or too much body weight for this ??? so why not use a 12 year old kid as the pilot??? whats this survival suit caper ..... if ...

Holy grail of authenticity ...oh yes ...would be nice if I could just change a Suzuki carb for an Amal...!! not much luck with that yet !!!