ASP/MAGNUM FS400AR Rebuild/Overhaul
According to the exploded diagram for this engine, there is supposed to be a lock washer under the master rod bolt. My engine did not have this washer installed, when I tore down my engine. So I ordered one. I got all my spare parts from an authorized dealer named Conrad, in Germany. The factory lock washer I got, was very slightly oversize. It is supposed to fit down inside the relieved area of the brass bushing, under the bolt head. The washer I received did not fit in there 'comfortably', but I made it fit anyway.
Did yours have the lock washer installed??
When I was looking for parts, even though the Conrad number was different they still had the ASP (Sanye) number listed as well. IIRC. I did some cross reference on the numbers to be sure.
Yeah, since you even had the lock washer installed it is really puzzling how it could have come undone.
im future i will pay more attention to my crank case oil, i saw it had metal particals (brass) in it
Sorry for your suffering, but let this be a lesson we all pay attention too!
ANY metal particles in the oil, is cause for concern and a teardown.
I am impressed with how well you got it apart, repaired and put back together again
It is a really nice job.
Mine (SC400) is just fine. But I use the rather expensive O.S. F glow plugs. Break in procedure should be executed according to the manual. I would not begin with a large prop until the engine has seen some gallons of fuel.
Where would you suggest (if at all) to add another nipple onto the crank case to flush it out or add oil after runs? Could this be done without major disassembly?
I could have added on to mine when it was fully disassembled but I decided it was not necessary. Just my opinion.
JeffH: Although they now are selling alleged ASP engines, one fellow bought a .28 and it had no branding on it whatsoever! In any case, they do not service a single item they sell. They are an importer and retailer of model products. If it breaks, and it is under warranty, you send it back for a new one. They do not carry spare parts or do any servicing of anything.
Ok guys, I got it all together but I’m having some minor problems. I reassembled the engine with the nice link pins and made sure cam timing was correct, as well as the different length pushrods and pushrods covers were installed accordingly. I also checked the valves to make sure they move freely. It seems great without glow plugs, but when I put glow plugs in, it seems there is so much compression that the prop is hard to turn over. Is this normal for a new engine? My electric starter cannot turn it over, and I can’t get it to spin much by hand either. I also could use some help with how to wire os-type F plugs to hobbico 1.5 volt batteries (i have 2) with the standard harness that comes with the engine.
Anyway, if you can turn the engine over without glow plugs installed, it does not sound like you have a mechanical problem.
But if it become extremely difficult to turn over with the glow plugs installed, I would check that the glow plugs are the correct length, IE not touching the pistons at TDC. Also, make sure all excess oil is drained out so you are not fighting against a hydraulic lock.