OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Walk Behind Lawn Mower Frames Two Stroke Lawn Mower Frames Suzuki Engine Questions

Hi Bruce and all

I recently obtained a Suzuki 2 stroke engine off a Rover lawnmower. The body was shot and the guy reckoned that the engine needed new top and bottom seals along with new seals.
I got the engine for free but did not get the body as it was way beyond repair - The guy used the mower to mulch some tree brunches with a rusty deck and the deck fell apart.
I just have a few questions about the engine.

1) How can I determine if the bearings and seals need replacing?
2) Is it possible to replace the top and bottom bearings and seals without completely taking apart the engine?
3) Do these engines fit onto any mower base (ie Victa or Masport)?

VC Victa,

1. If the blade plate is on it is easy to check. Just grab the blade plate and check for movement from side to side. To much movement then the bearings and seals need to be replaced.

2. No the crankcase needs to be split.

3. They will fit any four stroke mower frame.

I would suggest that you replace the rings while you have it aparts in order to do a full recon.

Hi Bruce

Thanks for the quick response.
The engine currently has no blades/discs in place. Can I put any old blade on to test?
Is there any other parts on these engines that need replacing while I have it apart?

VC Victa,

Yes just use any blade plate and make sure that it is secure.

They are the main parts apart from a carby kit.

Hi Bruce

I have taken the engine completely apart and now I just wanted to know how to remove the bearings from the crankshaft? Is there a special tool that I need?

VC Victa,

They are not that hard to remove especially if you have a slide hammer which has either two or three arms which lock onto the outside of the bearing and also if you have an internal bearing that is not on a crankshaft it has another tool that has a lip on it to catch onto the inner part of the bearing. You then slide the hammer to pull the bearing off.

If you don't have one of those then you will need a small hammer to tap the old bearing on both sides in order to get it off and making sure that you don't hit the crank shaft.

Maybe some of the other member have their tricks to get them off but this is the way I have done it in the past until I purchased a slide hammer.

hi vc victa
in the past i have put suzuki engines on rover frames that originaly had a brigs on them. i have a big bob superswift with one on it,also a flymo and a talon. they are a good reliable engine. one of the main things to check when your ready to start it is make sure the choke butterfly is fully closing or it will be hard to start. i have had a couple that are getting full travel, but the butterfly is not closing all the way. when this happens they are bloody hard to start. its probably set right anyway but its worth checking cheers micka

Hi Bruce

I wanted to know how to put the piston rings on correctly. Do I need a special tool or is the another way of doing it?

VC Victa,

1. You can use plastic sheet to rap around the piston and then slide the ring down to the bottom groove first.

2. You put the ring leg into the first groove and try to walk it down to the bottom grove (you need to be careful not to break the ring).

3. You can buy a ring expander.

The first option is the cheapest and easiest way and the second option has risks and the third is the professional way.

Cheers Bruce got the rings into position without damage.
Know I just have another question how do I get the rings to fit tightly into the grooves? Do I need to buy a piston ring compressor tool or this another way to do it?
Thanks for all your help so far.

VC Victa,

A ring compressor is the way to go.

There is another way, you could use a hose clamp but you need to be careful using it. I would suggest to use thin plastic sheet like I suggested with getting the rings on.

Hi Bruce

Thanks for all the help so far, I have the engine back together.
However I now have another issue the engine mounts do not line up the mounts on my Morroson Vinaro body that I wanted to put the engine onto. Do I need to change the mounting plate on the engine? Or do I need to fabricate my own.

VC Victa,

What motor was on the Morroson Vinaro because if it was a four stroke then the motor should fit.

Hi Bruce

It had a briggs classic 4 stroke engine on it.

It should line up with the holes because when it was made it was designed to fit any four stroke mounting.

Hi Again

I have the engine on the body. I has the mounting plate on the wrong way, however the Suzuki engine seems to have a bad spark. It's a yellow colour not blue and seems to be intermittent when you pull the starter.

Do you have any ideas on how O could fix this or do I need a new ignition module?

You did check the spark across a known good spark plug, or from the wire itself to ground didn't you? Otherwise, do that as your first step. If isn't the spark plug, and because it can't be kill-wire circuit if it gives a yellow spark, it has generated as a weak spark due to either a primary or secondary ignition circuit fault. However many things could cause such a fault. If it does not have breaker-points, and you've set the clearance between ignition module pickup and flywheel with a visiting card, you seem to be left with earthing faults, weak flywheel magnet, or a bad module.

Hi Grumpy, do you know what I really like about this forum?
It's learning new things every day!! I didn't know you could test for spark by using the lead itself....I always thought you had to use a (hopefully) serviceable spark plug!!
Grumpy!!

stevea,

I agree with grumpy about the spark issue, just check what he has explained first before going any further.

Hi All

I cleaned everything and reassembled everything and now the mower has a good spark and starts up well, however now the mower does not want to turn off and seems to run too fast. I have checked the cut out wire and it is attached correctly. I have also checked the governor and that seems to be correctly set as well. At the moment there is no throttle control the mower only seems to run at full revs no matter where the throttle is set (only the choke setting slows the engine down).

Any help with this would be greatly appreciated.