98cc Suffolk spares (crank and big end)

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Jonnboys
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Joined: 31/05/2020 - 22:18
98cc Suffolk spares (crank and big end)

Hi everyone.

I'm new you top lawnmower restoration and repair. I have a Suffolk 98cc aluminium engine that has massive wear in the big end and the crank journal probably because the oil pressure has broken off and was lying in the bottom of the sump.

I am trying to source a new conrod and Frank in order that I can get get the engine running again as as the rest of it is in quite good condition. 

 

I have managed to locate a conrod that has very similar numbers on it to my original but but the last part of the number on my rod is MCD2 and the last part of the con rod I hope to replace it with with is MCD1 and I was wondering if anybody knew you the significance of this number and if it made any difference to any of the specifications between the two rods and whether one would be a direct replacement for the other.

 

I have also so managed to find and a comparable crankshaft which has the number B2 stamped on it it where has mine original has B1 stamped on it.  The other number that is also stamped on it are the same on both crankshafts so the same question occurs to me are they both the same and compatible.

Any help or advice would be greatly received.

Thanks, Jonnboys.

wristpin
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Joined: 23/05/2012 - 22:09
I suspect that you are

I suspect that you are looking  at batch or casting numbers.

Jonnboys
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Last seen: 4 months 4 days ago
Joined: 31/05/2020 - 22:18
Hi, thanks for your reply.

Hi, thanks for your reply.

I take your point, my worry is that there is the possibiliy that someone selling a critical part like this, deep in the engine,  may not be absolutely aware of which type and size of engine it came from and therefore mistakenly misadvertise it and you could pay money for a part that is not suitable to your requirements. But I suppose that's always a risk with second hand and parts of any nature.

I think possibly my best bet would be to look out for another mower or engine  the same as mine and make a very good engine out of two.