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UPDATE! Well i have been rotavating with a 1200 in heavy clay. I have been watching the temperature very closely and checking the temp around the engine. Rear of the block front of block, head, sump, top and bottom hoses, Top and bottom of rad. The result is I am running the electric water...

Update. 12v electric cooling pump fitted in replacement of bottom hose. Motor running on variable switch to adjust speed. Will test under load shortly :)

Thanks the information it is very useful. I am running a 70/30 mix. I was seeing around 110'c which is about 230f top hose. Bottom hose was around 80c around 160f so radiator doing its job ok.

I have fitted a temp gauge and it is running hotter that i would wish under load. Cooling system is currently in A1 condition. They thought it would be better as newer engines all have waterpumps

I have a Early B6100 with a D650 engine . It has a Siphone cooling system. Has anyone tried fitting an electric pump ? What are the pitfalls, Is it any better as later machines have a belt driven waterpump.

Shes a runner. Put a finishing topper on to give the new engine a load

the manual states that the F1 mark on the flywheel is the correct fuel timing mark . This being 25 Degree before top dead center . This mark is now in the window but still not fully correct.

I started from a point of all shims original. I have reduced to a point that I can now see F1 in the window. It starts first time, A bit smokey but clears and a bit knocky at low engine speed but revs cleanly

I started at that point and it would take three attempts to get it to start and smoked alot. I have reduced the number of shims to get the F1 mark in the window , It currently starts first time with glow but sounds a bit knocky at low revs. ;)

The diesel pump and the fuel injectors have both been overhauled and tested. The glow plugs are all new. What I have tried is glowing for the book time but keeping the glow on when cranking and it is starting much better, Making progress ;)

Thanks for the reply's . Yes the timing marks on the gears are exact. I have stripped and double checked. The fly wheel fitted on ok no bolt damage or issues so can think that flywheel is fitted in correct position . Thats one thing to discount. The pump was not on the timing marks when I...

Just a quick update, I have been playing with removing and fitting shims. I am currently running one less shims than i originally had, and it will start at the first attempt, slow to clean up but first attempt never the less. Is it possible to get the flywheel on incorrectly? I was wandering if...

Ok thanks. At least I am not on my own

Hi All , after some advice on my D650 engine fitted in a b6100. The engine has been a poor starter and has now been overhauled . I have got 0.5 oversized pistons ,new liners , New head and valves. Diesel pump and injectors both overhauled. Compression it as book The engine would only run...

Thanks for the reply. I am sure i have read on here that someone has done a engine change.

I have an old B6100 with a d650 engine .Has anyone swopped out the engine for a larger and more modern unit. I was looking at a 905 engine, but would like to know what people have done and would recommend.

I started a thread a short time ago asking what people thought of some of the cheap parts available on the market for kubotas of all ages. I went with the general opinion that genuine was the way to go. Stripped and overhauled my D650 engine and was very pleased with the results with the...

Ok , Thanks all I have ordered the parts from a Kubota dealer. Lot more expensive but I don,t wan to do this more than once . Cheers for your replys.

Hi all can i ask what the general thoughts are of the parts supplied by Kumbar Bros . I am looking for a D650 overhaul kit and the price seems good but i was interested in the quality of the parts as I am in the UK . Any experiences of these parts or the supplier would be greatful.

Yes!!!!! Great success! Loads of oil pressure. The light actually stays off even after the engine is turned off for a short time and Hot. Around 55psi on the test gauge . Happy days :)