Saving Old Seagulls

Thanks for the reply,
I've since stripped down one of my Century 100's. The cylinder head came off ok because of studs and nuts instead of bolts. I cleaned out the rust and gunge. Reassembled whole thing ............ took it for a run out and your right .... no more overheating ...... brilliant.

I ...

Is it possible to increase water flow in a century by installing a multiblade impellor similar to the QB series ??

I've got a beaut of a 40+ that always runs without any overheating ........... but also I've got a Century 100 that seems to pump out the same amount of water as the 40+ when running but it runs very hot and eventually stops after 10 minutes or so.

I'm guessing it may be a cracked head or similar ...

Thanks Peter, I'll run it on the boat this weekend and see how it goes.

pete c

Yesterday I bought another Century 100. Its compression is a lot lower than my original Century 100.
Its not been run in the water yet (it runs fine in the tank) but i'm assuming that it will need new rings and or barrel/rebore ??

It has studs and nuts on the head rather than bolts. I have not done ...

I have a century 100 which runs on 10 to 1, and a 40 + which has the no. 2 needle and runs at 25 to 1.

But uts easier just to mix my one container up at 10 to 1, so can i run the 40 + at 10 to 1 without changing needles ??

pete c

I had a problem with my century pumping a thin water stream when on my achilles 24 and a good thru put on my small dingy. The difference was i thought the ram pressure at the slots due to the faster water speed in the dingy.

I added two more slots to increase the ram pressure and this has worked ...

On both my Century 100 and Forty plus the water flow rate is less when used on my 24' sailboat than on my tender. It must be because the tender has more speed and the ram pressure at the water intake slots is greater. Therefore is it a good idea to add more or open the slots to increase pressure to ...