gogittum
Well-known member
Still grabbing at straws, trying to figure why I'm not getting the rpm's I want. From other reading I've done and from prop recommendations online, seems to me that the 10 x 14 should be a good fit on my boat/motor, but I'm only getting 4600 rpm out of the 10 x 14.
Also, (don't be too quick to jump on me here) a fully charged 10 amp battery has a hard time starting the motor and cranking speed is low. My reasoning is that a 10 amp started my 60 hp, 650cc Suzuki V-Strom motorcycle just fine and spun it fast for 2 years that I owned it.....just sold it a year ago. Seems like same battery should spin a 25 hp, 538cc Suzuki motor as well. I carried the jump starter with me the last 2 trips - and needed it on the river on Wednesday.
(the starter button requires a Lou Ferrigno thumb to get action, but that's a whole 'nuther problem)
I've put new impellers in water pumps of the 15 hp Force and the 15 hp Johnson and noticed that I could turn the lower unit input shafts by hand without much problem. The seals hafta keep water out, so I expect some resistance, but what I got seemed reasonable.
On this 25 hp Suzuki, I noticed that the input shaft is "very" stiff and could only turn it with a heavy glove on and really putting the strain on it. On the other end, turning the prop with lower unit on the bench did turn it over but needed a lot of force.
Has anyone ever heard of this problem ?? The seller assured me that he'd put a new impeller in there so I didn't check it when I was working on the gear shift - I went in from the prop/gear case end. Maybe he put something in upside down or something ??
Seems to me that thing is soaking up a lot of horsepower just turning the driveshaft.
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Also, (don't be too quick to jump on me here) a fully charged 10 amp battery has a hard time starting the motor and cranking speed is low. My reasoning is that a 10 amp started my 60 hp, 650cc Suzuki V-Strom motorcycle just fine and spun it fast for 2 years that I owned it.....just sold it a year ago. Seems like same battery should spin a 25 hp, 538cc Suzuki motor as well. I carried the jump starter with me the last 2 trips - and needed it on the river on Wednesday.
(the starter button requires a Lou Ferrigno thumb to get action, but that's a whole 'nuther problem)
I've put new impellers in water pumps of the 15 hp Force and the 15 hp Johnson and noticed that I could turn the lower unit input shafts by hand without much problem. The seals hafta keep water out, so I expect some resistance, but what I got seemed reasonable.
On this 25 hp Suzuki, I noticed that the input shaft is "very" stiff and could only turn it with a heavy glove on and really putting the strain on it. On the other end, turning the prop with lower unit on the bench did turn it over but needed a lot of force.
Has anyone ever heard of this problem ?? The seller assured me that he'd put a new impeller in there so I didn't check it when I was working on the gear shift - I went in from the prop/gear case end. Maybe he put something in upside down or something ??
Seems to me that thing is soaking up a lot of horsepower just turning the driveshaft.
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