Evinrude Lightwin 3hp Water Pump

[mike-stroz]

I was running my Lightwin today, serial number 3026 06362 for the first time on my boat, and the rpm’s dropped suddenly. After running running for about 30 more seconds until I realised it was overheating, I shut it off. I now have two questions: 1. would any major damage be sustained when it was running those 30 seconds when the rpm dropped? 2. I know I need to replace the water pump (I was led to believe the previous owner did when he actually didn’t) so what water pump kit should I buy and from where? From what I can tell, the engine is absolutely original down to the last screw, so it has the same lower unit it left the factory with and it hasn’t been changed.

[Mumbles]

Unfortunately, only a complete teardown will let you know if the pistons got damaged from the overheat situation. Doing a visual thru the exhaust ports only lets you see a small part of the piston and any damage could be hidden. Hopefully it was running on the recommended 24/1 or 16/1 fuel-oil mix and not the more common 50/1 mix when the overheat happened.

Your friendly OMC/BRP dealer will have the correct 379770 water pump kit (including the housing) or 379763 impeller kit for your ’58 Lightwin. They are also available from other sources.

http://www.ebay.com/itm/Water-Pump-Repa … 92?vxp=mtr

[mike-stroz]

Thanks, that really helps a lot. I was running it on a 16 to 1 mix as specified on the decal when it started overheating

[dave-bernard]

pull the head and inspect it . will give you at least a better idea of condition.

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