Re: SM 1990 drive unit seals
Mitchell Petersen
Hi Helen, I miss read what you were doing. I thought you were referring to the lower unit. As far as your oil leak goes. There is a 85x110x12mm oil seal with stainless steel spring at the top of the lower unit where the trumpet looking fibreglass thing marries with the lower unit. I believe this oil seal is designed to retain the oil, should this leak as a backup you have the silicone gasket you are using where the upper unit is bolted to the fibreglass trumpet looking thing. I would guess this oil seal has been dislodged or damaged when the upper unit was repaired/ reinstalled. The lower unit needs to be removed to replace this seal. This is not a difficult task once you have the upper unit off but the boat obviously has to be out of the water. For economy I just replaced the oil with engine oil as originally recommend by Amel. When examined all gears top and bottom had very little where so I believe engine oil is sufficient to use in this light application. It is my opinion damage caused to these units is most likely often from miss aligned engines rather then anything to do with oil grade. Let me know if it is unclear where the oil seal is located and I will mark it up on the plan. Mitchell
On Mon., 20 Jul. 2020, 5:17 pm Helen and Kostas Yuvanidi, <helenmi57@...> wrote:
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