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#1
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115 Merc lower unit oil?
Hello,
Can I use type 'C' 90 weight lower unit oil in a 78 115 Merc? I can't seem to find the 90EP readily. Is the type 'C' an 'EP' with more additives? Thanks. |
#2
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115 Merc lower unit oil?
Hi!
I honestly can't answer that definitively, but I can tell you that lower unit design goes back to 1962 before a lot of fancy lubes were available at all, so my instinct would be yes. That said - I use the Mercury brand lube in mine, it's not so expensive as to not use it. Now, While your paying attention here's a bunch of free advice. Make sure your timing at *max* advance is set to no more than 21 degrees, that you use a good mid-grade gas, and that it's propped to make at least 5500 WOT. Those motors are known for being a little "piston happy" and the above precautions will keep your powerhead happy. Use a can of Mercury "Power Tune" as directed once a year. Those motors that havn't popped a piston (and therefore seen an overhaul) have a LOT of "coking" going on around the rings from all the years of use. Stuck rings are the *second* most common cause of failure of those powerheads. Using a good quality ashless TCW-3 helps a lot in this area. I use the Pennzoil Synthetic Blend - It's only $9 a gallon at Wal-Mart - great stuff! And lastly make sure your carbs stay clean and your fuel pump stays in good shape, you don't want that critter running lean. -W "Blorf" wrote in message ... Hello, Can I use type 'C' 90 weight lower unit oil in a 78 115 Merc? I can't seem to find the 90EP readily. Is the type 'C' an 'EP' with more additives? Thanks. |
#3
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115 Merc lower unit oil?
OH!
Email me at: ten.tsacmoc@hkm1aw for a link to a Merc inline 6 only Newsgroup. Note that my email is typed backwards to foil the spam-bots. -W "Clams Canino" wrote in message news:K33cb.563135$uu5.92674@sccrnsc04... Hi! I honestly can't answer that definitively, but I can tell you that lower unit design goes back to 1962 before a lot of fancy lubes were available at all, so my instinct would be yes. That said - I use the Mercury brand lube in mine, it's not so expensive as to not use it. Now, While your paying attention here's a bunch of free advice. Make sure your timing at *max* advance is set to no more than 21 degrees, that you use a good mid-grade gas, and that it's propped to make at least 5500 WOT. Those motors are known for being a little "piston happy" and the above precautions will keep your powerhead happy. Use a can of Mercury "Power Tune" as directed once a year. Those motors that havn't popped a piston (and therefore seen an overhaul) have a LOT of "coking" going on around the rings from all the years of use. Stuck rings are the *second* most common cause of failure of those powerheads. Using a good quality ashless TCW-3 helps a lot in this area. I use the Pennzoil Synthetic Blend - It's only $9 a gallon at Wal-Mart - great stuff! And lastly make sure your carbs stay clean and your fuel pump stays in good shape, you don't want that critter running lean. -W "Blorf" wrote in message ... Hello, Can I use type 'C' 90 weight lower unit oil in a 78 115 Merc? I can't seem to find the 90EP readily. Is the type 'C' an 'EP' with more additives? Thanks. |
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