OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Engines Questions On Honda Engines Help with disassembly Honda 186cc engine.

I helped a friend swap over an engine for his Honda mower and he left me with his old engine. He said it just stopped and white smoke came out from everywhere. He hadn't put oil in it. I thought I might have a look at what went wrong and maybe have a go at a repair. However, I don't usually do internal repairs on lawnmower engines so I would like a little help. I have taken out the 6 bolts from the engine oil pan but was wondering if there was anything else that needs to be taken off to separate the engine. Is it just held together now by the sealant?

I don't know the model of the engine except that it is stamped as "HONDA 186cc". The engine I gave him was stamped in the same way but I think it was 157cc.

Anyway, if someone could give me a few hints on the disassembly that would be really helpful. For instance do I need to remove the flywheel/blower?

You probably don't need to pull the flywheel off just to inspect the internals but it will be easier to do it now than with the crank floating around once the bottom is off the engine I would think. As to if there are other bolts hiding I can't help you but someone will be along that knows these engines, try a soft faced hammer to shock the bottom free if you can't see anything else holding it.

G'day sparker,
You seem to have a GCV190 there.
There should also be a serial number [5 letters/7 numbers], stamped on the rectangular pad above the oil filler. With that, we can find the right parts list, at least.

As far as I can tell from the parts diagrams, it looks like there are 8 sump bolts. Have a look underneath - you may have to clean crud buildup out of recesses to see them all.

Thanks guys. I found the number, I think it's GJACA-1033300-MY51. I'm not sure about the last number. Gadge, yes, there were 2 bolts I hadn't seen. On looking it up it's a GSV190.