1. Use the full 4 digit year for everything you are asking your question about. Example: 1962, 1988, 2000, 2011
2. Include the correct name of your Whaler model. Example: Montauk 17, Montauk 170, Outrage 26, Outrage 260
3. Include the length when necessary. Example: 16, 17, 18, 20, 22
4. Do not post your email address anywhere on this site as it is already in your user profile.

no water pumping, Mercury 40HP
lydiabixby	#1  Posted on 03/10/10 - 3:14 PM
Member Posts: 21 Comments: 0 Joined: 03/10/10	During pre purchase test run, cooling water gradually stopped spewing from water exit hole. Returned to Marina under fast idle power for 10 minutes in that condition. Engine did not over heat by touch. Water pump impeller was found to have jumped the slotted shaft key allowing impeller to spin freely. Need i be concerned that some other damage occurred during that operation? Thanks. Pete
DWinter	#2  Posted on 03/10/10 - 3:19 PM
Member Personal Page Posts: 252 Comments: 0 Joined: 01/02/10	If you didn't get an overheat alarm, probably not. One thing to be aware of is if the impeller lost chunks, it very important that you find them, They can block water passages and cause damage that way. Duane G Winter 1984 BW Sport 15 Center Console
lydiabixby	#3  Posted on 03/10/10 - 4:19 PM
Member Posts: 21 Comments: 0 Joined: 03/10/10	Thank you Duane. I inspected the impeller myself and there were no "chunks" missing. The impeller will be replaced. I didn't know that there was an overheat warning. Good to know. Thanks. Pete
awayland	#4  Posted on 03/11/10 - 4:42 AM
Member Personal Page Posts: 160 Comments: 0 Joined: 04/30/09	Check that the tell tale, Exit hole, isn't clogged. I used a straightened paper clip to clean out the hole after getting into some mud. There was sand clogging the hole.
lydiabixby	#5  Posted on 03/11/10 - 1:42 PM
Member Posts: 21 Comments: 0 Joined: 03/10/10	Thank you, I did make sure the exit hole was open, remembering years ago that a mud wasp had clogged an outboard of mine. Pete
lydiabixby	#6  Posted on 03/14/10 - 5:10 AM
Member Posts: 21 Comments: 0 Joined: 03/10/10	Impeller has been replaced by mechanic. Not pumping as much water as I am used to seeing. Mechanic says this is normal due to the coldness of the Sea water, motor's temperature sensors are not calling for as much cooling. Can this be? Thanks, Pete
joninnj	#7  Posted on 03/14/10 - 7:55 AM
Member Personal Page Posts: 408 Comments: 3 Joined: 06/07/07	"Impeller has been replaced by mechanic. Not pumping as much water as I am used to seeing. Mechanic says this is normal due to the coldness of the Sea water, motor's temperature sensors are not calling for as much cooling." Pete, could be... The thermostats control the flow of water based on engine temperature. You mechanic could be right. Jon in NJ Many other boats and outboards in my boating history The Whaler is the one I like the best!!!
lydiabixby	#8  Posted on 03/14/10 - 9:31 AM
Member Posts: 21 Comments: 0 Joined: 03/10/10	Thank you Jon for that opinion supporting the mechanic's assertion. It makes me a bit nervous not to see a steady stream coming out since I have never run a water cooled outboard that didn't throw a strong, steady stream of water, start up to shut down. Could there be mud collected somewhere that keeps getting dislodged? Thanks, Pete
Derwd24	#9  Posted on 03/14/10 - 11:31 AM
Member Posts: 1607 Comments: 9 Joined: 05/09/07	"It makes me a bit nervous not to see a steady stream coming out since I have never run a water cooled outboard that didn't throw a strong, steady stream of water, start up to shut down." I think your situation merits a little more investigation. You don't mention a specific engine, but to my knowledge, the tell tale stream is not affected that much by thermostat position or engine temp. You should see a steady stream regardless of engine or cooling water temp. Dave - 1983 Outrage 22
DWinter	#10  Posted on 03/14/10 - 12:29 PM
Member Personal Page Posts: 252 Comments: 0 Joined: 01/02/10	What year and model 40 hp do you have? Something doesn't sound right. The impeller spins on a shaft based on engine rpm. The thermostat opens and closes to keep the engine at a constant temp. I'm not familiar with an engine whose water flow is based on cooling demands, but before I raise the BS flag, I need to know what it is. Duane G Winter 1984 BW Sport 15 Center Console
joninnj	#11  Posted on 03/15/10 - 5:36 AM
Member Personal Page Posts: 408 Comments: 3 Joined: 06/07/07	Pete, water should always be flowing out of the hole. It just may do so at different rates. Are you saying you see no water at all? Jon in NJ Many other boats and outboards in my boating history The Whaler is the one I like the best!!!
awayland	#12  Posted on 03/15/10 - 6:14 AM
Member Personal Page Posts: 160 Comments: 0 Joined: 04/30/09	Is this 40 an early 80s Evinrude? I had a similar problem on one where the tell tail was week a low RPM. The impeller came with 2 different size keys. And found the smaller key was used causing the impeller to spin on the shaft. There should always be a strong tell tail, where it comes from is before it goes into the block or thermostat.
lydiabixby	#13  Posted on 03/15/10 - 8:25 AM
Member Posts: 21 Comments: 0 Joined: 03/10/10	Thank you all for your interest, The motor is a 1998 40HP Mercury, 2 cycle. Me and the mechanic went back to the issue yesterday, Sunday, he had me feel the thermostat, it was cool, about half strength stream of water coming from exit hole. We took it out and ran it and more water came out when we ran it hard but the strength of the stream lessened when we reduced throttle and they engine cooled. Mechanic insists this is normal with an engine with a thermostat in the cooling system. Gulf water temp is about 58 degrees. Mechanic offered to change the thermostat if that would satisfy me. The engine does not get hot. Stays a very nice warm feeling. Exit stream is not hot. Mechanic did blow out, with air, the water exit hole to make sure nothing was obstructing that. Pete Edited by lydiabixby on 03/15/10 - 12:20 PM