Yak 52 Air Hose, Engine Start Spider, Part Number 4847A-P6-150-420
This hose supplies air from the Main Firewall bulkhead to the Air Start Spider. At the spider it terminates in a 45 degree B nut fitting.
On the factory schematic it is shown as number 92
1 per airframe.
New Russian hose material meeting the factory specifications has been used, plus good-condition used Russian hose fittings.
This part should be installed on a Yak 52 with standard air starting for the motor. No fitness for use should be assumed if this hose is installed on any other engine start device.
Once you've fitted this new hose, don't throw your old one away ! If the Original Russian hose fittings on your old hose are in good shape, please cut the ends off and ship them to us.
For each well cared-for RUSSIAN metric hose-end fitting, once received, inspected and deemed acceptable by us we'll send you an electronic refund (not to exceed $15 US per hose end) .
The blog has more details on our unambiguous accept / reject criteria.