Reply to drujinin:
I'm going to say "Lack of Coolant".
There is not an oil pump in the Pony, splash lubrication.
A possibility is, it was run almost dry and scored a bearing?
I would say it is starving for coolant!
On the D2/D4's there is a low spot on the "Coolant In" from the Main Engine to the Pony where they like to plug off with Rust.
Could be the same type of issue, use the "Search" function to look this up.
In the HOPEFUL WORLD of Troubles, this simple solution would e the one I would hope for!
Hi catboy,
could be several things making the pony seem to seize.
First is the carby dirty and/or starving for fuel supply, check the fuel flow to the carb by removing the fuel line at the carb and turning on the pony tank tap.
When the carby leans out it makes the pony run eratic - some choke can help it to recover if the fuel starvation is not too severe.
If the pony is running hot then it may need air bleeding from the water outlet elbow at the top front of the pony via a plug or vent cock located in the elbow. The pony has a water pump so it needs to be in working condition also.
It can also be cooling system blockage by crud as mentioned above.
The bearing problem may also be present-as mentioned above-if the pony has been stopped by turning off the mag switch and not by turning off the fuel and letting the engine stop itself by running out of fuel.
If the fuel is not turned off to stop the pony it leaves stale fuel in the bowl for the next start attempt.
Also the motion of the machine operating jiggles the float and floods the pony with fuel.
This fuel finds its way into the lube oil and dilutes it causing bearing seizure etc.
Suggest change the pony oil before next startup and see what happens--check drained oil for metal particles and dilution.
Hope this helps.
Cheers,
Eddie B.