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Honda 5hp (BF5/BF5A) Outboard Cooling Question
Hi,
We have the above identified outboard (1988 long shaft) on our 21' trailer sailor. Bought 2 years ago from a from a fresh water sailor (lake Ontario), and we sail on the Chesapeake (brackish). We flush the motor after a sail about 50% of the time. We replaced the impeller (disintegrated) last year, and the thermostat this year. Did not note any obstructions in the observable coolant passages. The motor starts on the first pull, and seems to run fine. The problem is that the cooling water indicator port (on the frame) only streams water at ~1000rpm and above; below which it just steams. During a stress test, we found the engine stalled after about 10 minutes of idling (& steaming). Should the indicator port stream water at all rpms? Does the steam indicate a cooling system problem? Any guidance from someone with similar experience would be much appreciated! Thanks. |
Honda 5hp (BF5/BF5A) Outboard Cooling Question
"Heather Wilson" wrote in message m... Hi, Should the indicator port stream water at all rpms? Does the steam indicate a cooling system problem? It has on any outboard I have ever owned. It sounds to me like you still have a problem with the impeller. You don't run the motor dry, do you? That will destroy the impeller really fast. The symptom that you describe would indicate a partially destroyed impeller, which would be unusual if it was always operated wet but could easily happen if you ran the motor dry while flushing it. Rod McInnis |
Honda 5hp (BF5/BF5A) Outboard Cooling Question
Heather,
You still have a water pump problem. Both of my Hondas stream at all speeds (except when the old one had trashed an impellor). The fact that you it streams above idle, but not at idle is a faithful indication of a water pump problem. Steam out of that port (or anywhere actually) is a bad sign. If it stalled after a long time hot, it may well have been done some damage. If the paint burned off anyplace - it is most likely damaged. As another stated, if you -ever- ran the engine out of the water, the pump is fried. The pump housing may also be damaged. At least you better get the lower unit off and check the pump again. Good Luck Matt Colie A.Sloop "Bonne Ide'e" S2-7.9 #1 -now with a BF9.9 XLAS Lifelong Waterman, Licensed Mariner and Perpetual Sailor Heather Wilson wrote: Hi, We have the above identified outboard (1988 long shaft) on our 21' trailer sailor. Bought 2 years ago from a from a fresh water sailor (lake Ontario), and we sail on the Chesapeake (brackish). We flush the motor after a sail about 50% of the time. We replaced the impeller (disintegrated) last year, and the thermostat this year. Did not note any obstructions in the observable coolant passages. The motor starts on the first pull, and seems to run fine. The problem is that the cooling water indicator port (on the frame) only streams water at ~1000rpm and above; below which it just steams. During a stress test, we found the engine stalled after about 10 minutes of idling (& steaming). Should the indicator port stream water at all rpms? Does the steam indicate a cooling system problem? Any guidance from someone with similar experience would be much appreciated! Thanks. |
Honda 5hp (BF5/BF5A) Outboard Cooling Question
I had a similar problem with an Evinrude 9.9, 2 stroke. The pump was OK,
turns out the water tube wasn't sealing right where it entered the block. SV "Matt Colie" wrote in message ... Heather, You still have a water pump problem. Both of my Hondas stream at all speeds (except when the old one had trashed an impellor). The fact that you it streams above idle, but not at idle is a faithful indication of a water pump problem. Steam out of that port (or anywhere actually) is a bad sign. If it stalled after a long time hot, it may well have been done some damage. If the paint burned off anyplace - it is most likely damaged. As another stated, if you -ever- ran the engine out of the water, the pump is fried. The pump housing may also be damaged. At least you better get the lower unit off and check the pump again. Good Luck Matt Colie A.Sloop "Bonne Ide'e" S2-7.9 #1 -now with a BF9.9 XLAS Lifelong Waterman, Licensed Mariner and Perpetual Sailor Heather Wilson wrote: Hi, We have the above identified outboard (1988 long shaft) on our 21' trailer sailor. Bought 2 years ago from a from a fresh water sailor (lake Ontario), and we sail on the Chesapeake (brackish). We flush the motor after a sail about 50% of the time. We replaced the impeller (disintegrated) last year, and the thermostat this year. Did not note any obstructions in the observable coolant passages. The motor starts on the first pull, and seems to run fine. The problem is that the cooling water indicator port (on the frame) only streams water at ~1000rpm and above; below which it just steams. During a stress test, we found the engine stalled after about 10 minutes of idling (& steaming). Should the indicator port stream water at all rpms? Does the steam indicate a cooling system problem? Any guidance from someone with similar experience would be much appreciated! Thanks. |
Honda 5hp (BF5/BF5A) Outboard Cooling Question
Hi Rod,
Nope, we never run the engine dry. The impeller is fine. Thanks! "Rod McInnis" wrote in message ... "Heather Wilson" wrote in message m... Hi, Should the indicator port stream water at all rpms? Does the steam indicate a cooling system problem? It has on any outboard I have ever owned. It sounds to me like you still have a problem with the impeller. You don't run the motor dry, do you? That will destroy the impeller really fast. The symptom that you describe would indicate a partially destroyed impeller, which would be unusual if it was always operated wet but could easily happen if you ran the motor dry while flushing it. Rod McInnis |
Honda 5hp (BF5/BF5A) Outboard Cooling Question
I had such a motor for many years. Never failed but yes you should see
cooling water coming out at any RPMs "Heather Wilson" wrote in message m... Hi, We have the above identified outboard (1988 long shaft) on our 21' trailer sailor. Bought 2 years ago from a from a fresh water sailor (lake Ontario), and we sail on the Chesapeake (brackish). We flush the motor after a sail about 50% of the time. We replaced the impeller (disintegrated) last year, and the thermostat this year. Did not note any obstructions in the observable coolant passages. The motor starts on the first pull, and seems to run fine. The problem is that the cooling water indicator port (on the frame) only streams water at ~1000rpm and above; below which it just steams. During a stress test, we found the engine stalled after about 10 minutes of idling (& steaming). Should the indicator port stream water at all rpms? Does the steam indicate a cooling system problem? Any guidance from someone with similar experience would be much appreciated! Thanks. |
Honda 5hp (BF5/BF5A) Outboard Cooling Question
Hi Guys,
We replaced the impeller last fall. Before we replaced it, it wasn't cooling too well. We think there is some salt buildup in the cooling system. Our next move will be to run the motor in a bucket of vinegar. Thanks! Matt Colie wrote in message ... Heather, You still have a water pump problem. Both of my Hondas stream at all speeds (except when the old one had trashed an impellor). The fact that you it streams above idle, but not at idle is a faithful indication of a water pump problem. Steam out of that port (or anywhere actually) is a bad sign. If it stalled after a long time hot, it may well have been done some damage. If the paint burned off anyplace - it is most likely damaged. As another stated, if you -ever- ran the engine out of the water, the pump is fried. The pump housing may also be damaged. At least you better get the lower unit off and check the pump again. Good Luck Matt Colie A.Sloop "Bonne Ide'e" S2-7.9 #1 -now with a BF9.9 XLAS Lifelong Waterman, Licensed Mariner and Perpetual Sailor Heather Wilson wrote: Hi, We have the above identified outboard (1988 long shaft) on our 21' trailer sailor. Bought 2 years ago from a from a fresh water sailor (lake Ontario), and we sail on the Chesapeake (brackish). We flush the motor after a sail about 50% of the time. We replaced the impeller (disintegrated) last year, and the thermostat this year. Did not note any obstructions in the observable coolant passages. The motor starts on the first pull, and seems to run fine. The problem is that the cooling water indicator port (on the frame) only streams water at ~1000rpm and above; below which it just steams. During a stress test, we found the engine stalled after about 10 minutes of idling (& steaming). Should the indicator port stream water at all rpms? Does the steam indicate a cooling system problem? Any guidance from someone with similar experience would be much appreciated! Thanks. |
Honda 5hp (BF5/BF5A) Outboard Cooling Question
"Heather Wilson" wrote in message m... Well, we tried the vinegar trick... let the motor run for a long time (15-20 mins) in a big bucket of vinegar. No change. Engine still runs fine at mid throttle, but doesn't seem to cool at low rpms. Impeller is fine... Any other ideas? Thanks! (Heather Wilson) wrote in message om... Hi Guys, We replaced the impeller last fall. Before we replaced it, it wasn't cooling too well. We think there is some salt buildup in the cooling system. Our next move will be to run the motor in a bucket of vinegar. Thanks! Matt Colie wrote in message ... Heather, You still have a water pump problem. Both of my Hondas stream at all speeds (except when the old one had trashed an impellor). The fact that you it streams above idle, but not at idle is a faithful indication of a water pump problem. Steam out of that port (or anywhere actually) is a bad sign. If it stalled after a long time hot, it may well have been done some damage. If the paint burned off anyplace - it is most likely damaged. As another stated, if you -ever- ran the engine out of the water, the pump is fried. The pump housing may also be damaged. At least you better get the lower unit off and check the pump again. Good Luck Matt Colie A.Sloop "Bonne Ide'e" S2-7.9 #1 -now with a BF9.9 XLAS Lifelong Waterman, Licensed Mariner and Perpetual Sailor Heather Wilson wrote: Hi, We have the above identified outboard (1988 long shaft) on our 21' trailer sailor. Bought 2 years ago from a from a fresh water sailor (lake Ontario), and we sail on the Chesapeake (brackish). We flush the motor after a sail about 50% of the time. We replaced the impeller (disintegrated) last year, and the thermostat this year. Did not note any obstructions in the observable coolant passages. The motor starts on the first pull, and seems to run fine. The problem is that the cooling water indicator port (on the frame) only streams water at ~1000rpm and above; below which it just steams. During a stress test, we found the engine stalled after about 10 minutes of idling (& steaming). Should the indicator port stream water at all rpms? Does the steam indicate a cooling system problem? Any guidance from someone with similar experience would be much appreciated! Thanks. Piece of old impeller in the passage. Water tube not in the pump outlet all the way. Bill |
Honda 5hp (BF5/BF5A) Outboard Cooling Question
I used to own one which did the same thing. A friend of mine who rebuilds
motorcycles and small engines checked it out and just increased the low rpms enough to get better water flow. The engine rpm was too low. "Heather Wilson" wrote in message m... Well, we tried the vinegar trick... let the motor run for a long time (15-20 mins) in a big bucket of vinegar. No change. Engine still runs fine at mid throttle, but doesn't seem to cool at low rpms. Impeller is fine... Any other ideas? Thanks! (Heather Wilson) wrote in message om... Hi Guys, We replaced the impeller last fall. Before we replaced it, it wasn't cooling too well. We think there is some salt buildup in the cooling system. Our next move will be to run the motor in a bucket of vinegar. Thanks! Matt Colie wrote in message ... Heather, You still have a water pump problem. Both of my Hondas stream at all speeds (except when the old one had trashed an impellor). The fact that you it streams above idle, but not at idle is a faithful indication of a water pump problem. Steam out of that port (or anywhere actually) is a bad sign. If it stalled after a long time hot, it may well have been done some damage. If the paint burned off anyplace - it is most likely damaged. As another stated, if you -ever- ran the engine out of the water, the pump is fried. The pump housing may also be damaged. At least you better get the lower unit off and check the pump again. Good Luck Matt Colie A.Sloop "Bonne Ide'e" S2-7.9 #1 -now with a BF9.9 XLAS Lifelong Waterman, Licensed Mariner and Perpetual Sailor Heather Wilson wrote: Hi, We have the above identified outboard (1988 long shaft) on our 21' trailer sailor. Bought 2 years ago from a from a fresh water sailor (lake Ontario), and we sail on the Chesapeake (brackish). We flush the motor after a sail about 50% of the time. We replaced the impeller (disintegrated) last year, and the thermostat this year. Did not note any obstructions in the observable coolant passages. The motor starts on the first pull, and seems to run fine. The problem is that the cooling water indicator port (on the frame) only streams water at ~1000rpm and above; below which it just steams. During a stress test, we found the engine stalled after about 10 minutes of idling (& steaming). Should the indicator port stream water at all rpms? Does the steam indicate a cooling system problem? Any guidance from someone with similar experience would be much appreciated! Thanks. -----= Posted via Newsfeeds.Com, Uncensored Usenet News =----- http://www.newsfeeds.com - The #1 Newsgroup Service in the World! -----== Over 100,000 Newsgroups - 19 Different Servers! =----- |
Honda 5hp (BF5/BF5A) Outboard Cooling Question
Hi Greg,
We had considered this, but the required RPMs are so high, we'd be breaking shear pins left & right! We think the improperly seated water tube and/or impeller pieces in the tube is probably the problem. Will try to blow it out/seat it next. Thanks! "Greg" wrote in message ... I used to own one which did the same thing. A friend of mine who rebuilds motorcycles and small engines checked it out and just increased the low rpms enough to get better water flow. The engine rpm was too low. "Heather Wilson" wrote in message m... Well, we tried the vinegar trick... let the motor run for a long time (15-20 mins) in a big bucket of vinegar. No change. Engine still runs fine at mid throttle, but doesn't seem to cool at low rpms. Impeller is fine... Any other ideas? Thanks! (Heather Wilson) wrote in message om... Hi Guys, We replaced the impeller last fall. Before we replaced it, it wasn't cooling too well. We think there is some salt buildup in the cooling system. Our next move will be to run the motor in a bucket of vinegar. Thanks! Matt Colie wrote in message ... Heather, You still have a water pump problem. Both of my Hondas stream at all speeds (except when the old one had trashed an impellor). The fact that you it streams above idle, but not at idle is a faithful indication of a water pump problem. Steam out of that port (or anywhere actually) is a bad sign. If it stalled after a long time hot, it may well have been done some damage. If the paint burned off anyplace - it is most likely damaged. As another stated, if you -ever- ran the engine out of the water, the pump is fried. The pump housing may also be damaged. At least you better get the lower unit off and check the pump again. Good Luck Matt Colie A.Sloop "Bonne Ide'e" S2-7.9 #1 -now with a BF9.9 XLAS Lifelong Waterman, Licensed Mariner and Perpetual Sailor Heather Wilson wrote: Hi, We have the above identified outboard (1988 long shaft) on our 21' trailer sailor. Bought 2 years ago from a from a fresh water sailor (lake Ontario), and we sail on the Chesapeake (brackish). We flush the motor after a sail about 50% of the time. We replaced the impeller (disintegrated) last year, and the thermostat this year. Did not note any obstructions in the observable coolant passages. The motor starts on the first pull, and seems to run fine. The problem is that the cooling water indicator port (on the frame) only streams water at ~1000rpm and above; below which it just steams. During a stress test, we found the engine stalled after about 10 minutes of idling (& steaming). Should the indicator port stream water at all rpms? Does the steam indicate a cooling system problem? Any guidance from someone with similar experience would be much appreciated! Thanks. -----= Posted via Newsfeeds.Com, Uncensored Usenet News =----- http://www.newsfeeds.com - The #1 Newsgroup Service in the World! -----== Over 100,000 Newsgroups - 19 Different Servers! =----- |
Honda 5hp (BF5/BF5A) Outboard Cooling Question *SOLUTION*
Hi Guys,
We pulled the lower drive on the outboard today to further investigate the problem. Turns out, there's a rubber cap seal between the output of the water pump and the water tube. We found the seal pushed up on the water tube where it wasn't engaging the top of the water pump housing. During installation, the cap seal is pressed onto the top of the water pump housing, and slides onto the water tub as the lower drive unit is installed. We started it, and now pumps water from the indicator at all RPM! Thanks to everyone for all the help. Hopefully, this will help someone else with a similar problem. (Heather Wilson) wrote in message om... Hi, We have the above identified outboard (1988 long shaft) on our 21' trailer sailor. Bought 2 years ago from a from a fresh water sailor (lake Ontario), and we sail on the Chesapeake (brackish). We flush the motor after a sail about 50% of the time. We replaced the impeller (disintegrated) last year, and the thermostat this year. Did not note any obstructions in the observable coolant passages. The motor starts on the first pull, and seems to run fine. The problem is that the cooling water indicator port (on the frame) only streams water at ~1000rpm and above; below which it just steams. During a stress test, we found the engine stalled after about 10 minutes of idling (& steaming). Should the indicator port stream water at all rpms? Does the steam indicate a cooling system problem? Any guidance from someone with similar experience would be much appreciated! Thanks. |
Honda 5hp (BF5/BF5A) Outboard Cooling Question
Hi Guys,
Thanks for all the help! I'd say that you helped us eliminate most of the problems. Thanks! We pulled the lower drive on the outboard today to further investigate the problem. Turns out, there's a rubber cap seal between the output of the water pump and the water tube. We found the seal pushed up on the water tube where it wasn't engaging the top of the water pump housing. During installation, the cap seal is pressed onto the top of the water pump housing, and slides onto the water tub as the lower drive unit is installed. We started it, and now pumps water from the indicator at all RPM! Thanks to everyone for all the help. Hopefully, this will help someone else with a similar problem. "Luc Poulin" wrote in message m... I had such a motor for many years. Never failed but yes you should see cooling water coming out at any RPMs "Heather Wilson" wrote in message m... Hi, We have the above identified outboard (1988 long shaft) on our 21' trailer sailor. Bought 2 years ago from a from a fresh water sailor (lake Ontario), and we sail on the Chesapeake (brackish). We flush the motor after a sail about 50% of the time. We replaced the impeller (disintegrated) last year, and the thermostat this year. Did not note any obstructions in the observable coolant passages. The motor starts on the first pull, and seems to run fine. The problem is that the cooling water indicator port (on the frame) only streams water at ~1000rpm and above; below which it just steams. During a stress test, we found the engine stalled after about 10 minutes of idling (& steaming). Should the indicator port stream water at all rpms? Does the steam indicate a cooling system problem? Any guidance from someone with similar experience would be much appreciated! Thanks. |
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