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Valkyrie Riders Cruiser Club > General > General Board > EZ-Go Robin 295cc golf cart motor
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Author Topic: EZ-Go Robin 295cc golf cart motor  (Read 1355 times)
Skinhead
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Posts: 8727


J. A. B. O. A.

Troy, MI
« on: September 30, 2020, 07:36:15 PM »
Looking for some small engine expertise.  My granddaughter was given a old EZ-Go golf cart with a 2 cylinder Robin engine (made by isuzu I believe).  When we picked it up, it didn't run.  I checked the oil level in it and it only had about 2 oz of oil in it, so I added oil and changed the plugs and got it running.  It smoked like a train and was low on power, but she ran it for a while, but we decided the neighbors probably didn't care for the smoke, so I tore the engine down expecting to find badly scored cylinders/pistons.  That wasn't the case cylinders and pistons looked good, very little wear.  I bought a rebuild kit, and expect the valve seal is bad on one cylinder as the spark plugs on that cylinder was oil fouled while the other plug was fine.  My question after all that is should the cylinders be honed before I reassemble it?  The cylinders show no crosshatch or signs of ever being honed, and I was wondering if anyone knows if they should be?  The cylinders appear to be aluminum with no liners.  Thanks in advance.
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Troy, MI
The emperor has no clothes
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Posts: 29945
« Reply #1 on: September 30, 2020, 08:07:44 PM »
An aluminum cylinder with a coating ? I think they used to call them Nikasil. My old CR250 had that. As I remember they didn't require a hone.
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Robert
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Posts: 17002


S Florida
« Reply #2 on: October 01, 2020, 12:34:07 AM »
Check the cylinders for being out of round or tapered and no dont hone it since you could damage the coating. Sometimes they overheat the engines and damage the cylinders.
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“Some people see things that are and ask, Why? Some people dream of things that never were and ask, Why not? Some people have to go to work and don’t have time for all that.”
Skinhead
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Posts: 8727


J. A. B. O. A.

Troy, MI
« Reply #3 on: October 01, 2020, 04:52:49 AM »
Quote from: Robert on October 01, 2020, 12:34:07 AM
Check the cylinders for being out of round or tapered and no dont hone it since you could damage the coating. Sometimes they overheat the engines and damage the cylinders.

Cylinders were measured, no taper, ridge, or out of round.  In fact, surprisingly little wear at all.  Thank you fo the replies.
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Troy, MI
Patrick
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Posts: 15433


VRCC 4474

Largo Florida
« Reply #4 on: October 01, 2020, 06:17:51 AM »
Wish I could help, no experience with this. I'll see what I can find. I know you can't use the dingle balls deglazer.
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da prez
Member
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Posts: 4358

. Rhinelander Wi. Island Lake Il.
« Reply #5 on: October 01, 2020, 08:06:27 AM »
 I is possible an oil ring was stuck. Rebuild will take care of that. Be sure the ring grooves are clean and no vacuum leaks.  Also would be a good time to go thru the carb. Be sure the carb kit is the updated version , N O T  new old stock.  If it has points ( old timer word) , see if an electronic ignition upgrade is available. It will give a hotter spark.
  I believe the engine is a Wisconsin Robbins.
                                                      da prez
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