You cannot see to line this tube up with the pump when reinstalling the lower unit, and I’m betting this is why the pump quits working when a new impeller is installed. I really think this may be more of an issue than the oil seal for the top of the pump housing. Suzuki calls this – The water Pump Case Grommet Part#- U28 Genuine Suzuki Marine 17415-98501 Water Pump Case Grommet. This one “seals” the water line going to the motor, where it goes into the pump. While replacing the seal, I spotted another rubber gasket. Since the seal had broken down from either heat or water abrasion or both, I suggest buying a tube of lithium waterproof grease, and coating the “oil” seal when you install it. But so as not to confuse lets call it the Oil Seal. Technically it’s not an Oil Seal since it seals the shaft and prevents exhaust gas from pushing water out of the pump. It’s a - R91 Genuine Suzuki Marine 09289-10002 Oil Seal. I went to the Suzuki Part page, and found the seal. I finally found another owner who said he replaced an oil seal on the pump head, and that fixed the problem. My motor is 1992 vintage, but from what I read the DT4 had this problem for ten years with no recall, or instructions for a fix. Sooooo – Suzuki knows about the problem and has no recall, no fix, and only an exasperated tech who tells customers to drill holes to relieve the back pressure. I found another forum post where the owner had contacted Suzuki, and the tech acted like”I’m sick of hearing about this” He told the owner to drill out the relief holes at the back of the motor at least two sizes larger and the back pressure would be reduced enough for the pump to work. NOTE: the pump would work when the access cover was off, because the exhaust vents thru the access hole with the cover off. I read several forums and the consensus was that the exhaust from the motor was pushing the water back down the tube, and the pump would run dry. Took it off again and it started pumping. I put the access cover back on and it quit pumping. I forgot to put the shift linkage access cover back on, and the pump worked and was pushing out of the telltale hole nicely. I had meticulously followed the instructions for changing, and rotating the shaft clockwise while bringing the top plate down over the new impeller. The first thing I did was order another impeller from a different seller, and made sure that it said Genuine OEM part. Give us a call and our team can help you find the right parts for your engine.I have been having the problem where the pump stopped working after an impeller change. Need additional assistance? Our customer service team is available Monday-Friday, 9AM to 4PM EST at 1-87. Refer to the chart below to find the part you need for your Suzuki outboard. In addition to Suzuki water pump rebuild kits, we also offer water pump gaskets, water pump housing, and impellers. We stock a variety of Suzuki Water Pumps and Impellers from Sierra Marine. Whether you need to replace your entire water pump, or just an impeller, Wholesale Marine has you covered. Water pumps draw in water from the lower unit and circulate it throughout the engine to keep things cool. If your Suzuki engine is overheating, it may be time to replace your water pump. Suzuki Outboard Water Pumps and Impellers
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