EVIN 25 1974

[G DANE]

I am restoring an old 25HP Evin. It has had an airleak at the top end of crankshaft. Is it OK to install a gasket of the type on the never motors ( i don´t know the english name ) beyond the old gasket, build in the bearing ?. There is room enough between the bearing and the cam for the breakers. I think the new kind will be more tight.<br />The same replacement could be made in the bottum, replacing the spring-held rubber gasken with a silicone shaftseal, as in top.<br />

 

[clanton]

Re: EVIN 25 1974

Part number for the upper crankshaft seal in the bearing is,<br />OMC 305987<br />GLM 86380<br />Sierra 18-2018<br />Should be able to remove seal from bearing race and install new one.

 

[G DANE]

Re: EVIN 25 1974

Clanton thanks for the help. I got the gaskets and i am assembling again. Appreciate your help.

 

[SCO]

Re: EVIN 25 1974

Hey Great Dane how did you test for that air leak I need to do that test

 

[G DANE]

Re: EVIN 25 1974

Hi Sco <br /><br />My motor did only iddle on one cylinder and when increasing speed, the other cylinder suddenly fired up. Full speed was no problem.<br /><br />Problem started small, but developed during a year.<br /><br />Both cylinders had same compression, 112 cold. When motor ran, it sprayed fuel out under the hood at the upper crankshaft end.<br /><br />If it does at lover end, it can sometimes be seen like oil that leaks out on the water, but it can appear anyway.<br /><br />I have heard you can try to spray WD 40 or start gas on outside of engine while running iddle. If iddle gets better, you have a leak where you spray. Be carefull with start gas as it doesnt contain oil.<br /><br />Good luck