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SR3


luctor et emergo

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Slight bluey grey exhaust is normal for these engines. There are internal crankcase breather tubes under the valve covers which connect with the inlet ports to suck out crankcase fumes and excess pressure. Its also a sign that your engine is possibly not under enough load. How much oil does it use.

The head gaskets would also be different as the SR's bore diameter is 3'' against the ST's 3.75''.

Edited by bizzard
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  • 5 years later...

But you do not want just the box, you also need to ensure that it is supplied with the drive that (from distant memory) bolts to the flywheel.

 

Does you existing box have a reduction box hanging off the end? If so does the "new" one and do the ratios match or is the ratio suitable for your propeller?

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There is a large circular adaptor  with air flow holes needed to mount to a Lister flywheel housing .........these are used for any close coupled engine,such as gensets and dumpers.If you dont have this on your motor,make sure you can find one ,unless the box has one.........edit...........I wonder if its a water cooled SR3.........they are pretty rare,but seen ocassionally?......or am I dreaming.....maybe its Petters that are sometimes water cooled.....seen a few of them in boats...PH3W..?

Edited by john.k
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5 minutes ago, john.k said:

There is a large circular adaptor  with air flow holes needed to mount to a Lister flywheel housing .........these are used for any close coupled engine,such as gensets and dumpers.If you dont have this on your motor,make sure you can find one ,unless the box has one.

The adapter is specific to the gearbox - the LM100 one won't work on an LH150

 

And you need the input shaft that bolts onto the flywheel - it must be the right one for an LH150 and it MUST be the correct one for the engine. The SR and ST input shafts are different

 

Richard

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If you go back 7 years here,there is a SR4 with a gearbox remotely mounted on steel engine bearers............with no apparent cross bracing..............no housing needed,provided the alignment is OK ,and in this instance ,a large flexible drive seems to be used to couple the units and to allow for  misalignments....So ,the lack of a housing will not discourage or delay a determined boatie..................You might also note,there is no measure taken to stop recirculation of heated air,and I would expect the engine to overheat in a situation needing full power,such as running a bar......which is a spot where you dont want to lose power .

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