My mechanic did put engine oil (SAE 15-40) into my transmission. He said it is fine! Manual says SAE 30 has to be placed into transmission of my Huntr 45CC. Any thoughts? Than
Transmission Oil
- Thread starter Viktor Eysselein
- Start date
Probably a hold-over from the days when there were differences in the additives. Single weight oils used to have less detergents which in theory meant less possibility of foaming. Contemporary oils are formulated with non-foaming additives.
Hi Viktor, the 4JH2-TE Yanmar with a Kanzaki transmission on our boat has an ID plate on the bell housing in front of the transmission that states the recommended type of transmission fluid. Ours states ATF. If it were my boat I would follow that recommendation. Our owner's manual differs from the service manual.
Viktor, I have the same boat as you, 2006 Hunter 45 CC. The plate on the rear of my transmission reads the same, SAE 15-40. I could not find that weight, so my mechanic recommended using SAE 30.
Jeff
Jeff
Multi-grade motor oil is supposed to increase viscosity as it warms up. When the oil is cold it will be 15W thin and when it heats up it may reach 40W thick. These oils are designed to properly lubricate the engine at different temperatures but these will differ from the range of temperatures experienced by a transmission. If the manufacturer recommends single SAE 30W I would follow its recommendations rather than having an oil too thin or too thick at different intervals. Being the fact that a transmission is a mostly clean enclosed space, free from combustion byproducts, and that synthetic oils are heat and viscosity breakdown resistant I would recommend their use in transmissions. Now it has been reported that in older boats the use of synthetic oils has led to oil leaks. I don't know if perhaps the leaks were just being held by sediments build up or if the synthetic oil was responsible for gasket and seal failures. In any case it would be your choice but do use a single grade oil as per manufacturer's recommendation. I'm sure is not critical as I have seen ATF, single grade and multi grade oils being used in a transmission at different intervals with no apparent ill effects. Our h320 was delivered from the dealer with ATF, we would check the fluid once every couple of months and always had to add a tad. Upon getting our hands on the shop manual which recommended motor oil we switched to 30W oil and ever since almost 15 years latter the oil level has been spot on. I think it was replaced once just for good measure as it was still clean and seemed OK.
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Gee, simplest thing is to RTFM and use the right material. Hurth transmissions take ATF, the Kanzakis, as far as I've read for the past 18 years all take motor oil. Good luck.
Ken, good one, certainly the first...
I never did figure out what a sutra was --- some Dodge minivan?
Quick note.. many/most of the older Yanmar QM engines have a disk type transmission and those use ATF.. several of the new higher horsepower Yanmars have disk type transmissions as well.. Best to put eyes on the plate on the side of the gearbox of your boat and write it down somewhere .
Bad Karma that may require Sutures (?) if ya don't use the correct oil
Bad Karma that may require Sutures (?) if ya don't use the correct oil
Koudie, Karma and Sutures... Close enough lol good one there.
Actually it was meant to refer "rtFm" the only F manual I know of is the famous karma sutra. Many position to break your back if not done right... LOL
Ok back to OP, I use same oil for crankcase and gearbox(Kanzaki KM2P), Shell Rimula 15W50.
Actually it was meant to refer "rtFm" the only F manual I know of is the famous karma sutra. Many position to break your back if not done right... LOL
Ok back to OP, I use same oil for crankcase and gearbox(Kanzaki KM2P), Shell Rimula 15W50.
Ken, good one again. I used the rtFm once and got banned by some oversensitive moderator, so when I use it now I write: RTFM - Brian the F stands for funny.