Fd620d

[Madman]

Ok I got a 1996 conquest with a fd620 motor it seems to start and run fine but if you pull the oil dipstick when running it is sucking and puffing quite bad. I checked the breather the that goes in to the air box and there is no sucking or puffing. I checked my valves clearance and push rods and everything is good. Could it be bad rings or a bad valve or hopefully just a bad valve for the crankcase pressure any thoughts thanks

[racerone3]

It should "suck and puff" through the dipstick. that is perfectly normal. The crankcase breather has a check valve in it and also a bunch of stainless steel packing (think brillo pad).... therefore the suck and puff is reduced. Many small engines (almost all Briggs) will shoot oil out the dipstick tube if you remove it while running.

[Nubs]

[Madman]

Well I feel stupid but I guess it's worth it seems how I don't have to spend any money fixing it

[Nubs]

Should never feel that way about asking questions!

[guyfox]

Better to ask questions and receive answers then not ask questions and cost a lot of money in repairs...This way you get to enjoy riding your machine instead of fixing it and then not enjoy it.

[Madman]

Fd620

Yet another question I couldn't find any answers by searching. Been trying to get my conquest all rebiult and running good and it was having some problems turning over like a weak battery so I replaced it with a brand new 51 series battery and still same problem. It acts like it has to much compression to turn over i looked at the manual to see if it had a decompression valve and it doesn't not that I can see in the manual anyways. I checked my valve clearance several times and they are right where they should be. It also makes some pretty bad clunking noises when trying to turn over sometimes not all the time tho any ideas would be highly appreciated thanks.

[JohnF]

When you say that you checked valve clearance do you mean valve lash? I am asking because this particular engine is fond of dropping/bending push rods due to sticking valves. While you have the valve cover off hit the starter and watch to see that the valves are actually moving. You can pull the spark plugs to verify that things turn properly without compression.

Well, I went back and checked your history - you already know about the push rod issue.
I see that you were having problems with charging. Now I'm thinking I would check the all of the clearances around the flywheel. Look for something dragging like a loose magnet.

[Madman]

Thanks john it cranks over great when the plugs are out and I checked the flywheel and magneto they check out great. I had my riding mower have the same symptoms it ended up being the cam for the decompression valve that's was set up to work only when it was cranking over

[plott hound]

my conquest was doing the same thing.took the starter apart and cleaned it but made no difference.put a new starter on and problem solved.should also mention that this was after a total engine rebuild.

[Madman]

Well guess I will be buying a starter then lol this thing had been a money pit but when I'm done replacing everything it should run like a champ I would like to thank everybody that has helped me with the argo it's been a really big learning adventure for me

[JohnF]

Alright - no dragging - no problem without compression - valves appear to be working properly. Something is too weak.

Could be starter like plott hound mentions but I would make sure I had good power to the starter I had first and I don't see where you mention checking this. Good battery -> good connection at terminals -> good ground... That sort of thing. I would probably try out jumper cables to my truck. Battery positives to each other and then truck negative to argo engine block.

Good luck. Keep us posted.

[Madman]

Well I took my starter out today and went to take it part and clean it up just to find that the brushes are melted on 3 of them so I am pretty sure this is the problem any good places to buy a cheap starter I'm thinking eBay and you guys are awesome I would have never checked my starter thanks

[plott hound]

phone beiler engines,they are in pa.great guys to deal with for any kawi parts.