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I had the Aspera engine for lawn mover, the engine ran on pure kerosene without problem after the engine ran first on gasoline. 😊

Also you need the ideal gas law: adiabatic compression to find the temperature of compression if the volume, pressure and moles is known. https://www.calculatorsoup.com/calculators/physics/ideal-gas-law.php

Here is the proposal how you can construct a float chamber with a cork to float in petrol.🙂

Measure and correct the errors in the ports that have occurred during casting. Look at the photos that say a lot.

Much better to have the 2 part IP eccentric sheave instead the IP sheave with crankshaft in case there is faults with the crankshaft in case bend or twisted. The crankshaft is not so easy to machine straight from the steel bar. My crankshaft is build up of a lot parts and silver steel shaft...

Minh-Thanh and folks.. How to find the angle of the template.. Better to use cad program to measure angle.

It's not necessarily to lap the bearings after boring and reaming the bearings. See at the surfaces is smooth.

I has build own model engines, all bearings is renamed with adjustable reamer to adapt the crankshaft. Running-in the engine make better than we can do it with the tools. It's oil who is lubricate and keep tight against air leakage and remove heat by friction.

In the smaller bore and longer, use D- bit reamer after the hole is drilled. The oil in fuel is "sealer" to preventing the false air to be sucked into the crankcase in the two stroke engine via bearing/crankshaft.

Model diesel engine from Pakistan inspired from Ruston Hornsby diesel engine. 😃

MAXAC is fault word. It's ZAMAK, zinc alloy, easy to melt and strong near as cast iron. https://en.m.wikipedia.org/wiki/Zamak

You can use metal mesh around the glow spiral so pieces do not get into the engine.

In the model diesel engine the heated air is better due ether isn't cheap and some countries are the ether not available for buyers. I'm car mechanic since 1993 and know how the diesel engine works. And I had repaired the tractor Massey Ferguson and John Deere where my relatives are farmers.

You can use a glow spiralwire inside the pipe connected to the intake manifold to heat the air while starting the engine.

You will find this same mode of operation as in the feed pump for diesel pumps and petrol pumps in petrol engines. pump diameter must be larger so it ensures that there is a little overpressure present as long as it is consumed by the engine. pumps less at idle and pumps more at increasing...

Here is the better solution. The spring is pumping the fuel into the injection pump, if pressure is enough then the spring is feeding the fuel before the cam is pushing the lever to suck more fuel. The spring is maintained to keep the continuous fuel feeding. The pump piston diameter must be...

Find Hansen used compression ratio 20:1 and kerosene with 2% oil to lubricate the injection pump.

Kerosene is easy to atomize than diesel oil due difference of the viscosity in kerosene and diesel oil. The gasoline engine can run on kerosene but not so easy to use diesel oil in gasoline engine.

In our Norwegian "Sabb" boat diesel engine has a round copper cylinder head gasket with 2 rubber gasket left and right side of the cylinder to lead coolant from cylinder to cylinder head. A inspiration for you?😊

You can use soft copper or aluminium ring around the cylinder and the outside to water and oil canals use o- ring.