Thanks for posting this! I just bought a CAL 35 Cruise with a Perkins 4107. Went out today out of Long Beach, CA and my water temperature gauge pegged out at 235° I limped her back into my slip being careful to watch the oil temp, which never got above 190°, however i could start to smell the coolant boiling off and steam coming out of my engine compartment. I will definitely being using this video to go through the entire cooling system this week. Thanks again for taking the time to do this!
Hey Steve, thanks for taking the time to make and post this very informative video. Although I have a Perkins M20, some details were good to know and see, such as the heat exchanger, etc.
Nice Magnum 42. I can tell because I have one too and things inside were starting to look mighty familiar around the 5 minute mark. Thorough process review. Nice job. I think 190, although at the high end of the range, is a normal temperature for a Perkins 4-108. I have read that they run far more efficiently (and happier) between 175 and 190 than their raw water-cooled brethren do at the lower temperatures (at or below 150). Good luck with the boat this season. I'm launching mine for the first time this Spring. Wish me luck.
I have a Perkins 4-108, (1976) (4100 hours) and I was told never to exceed 2200 RPM with it.. I suppose this is all dependent on the transmission and the prop that is installed.. At that RPM, I get about 3 to 3.4 litres per hour ( .8 to .9 US gallons per hour) Dependent on how clean the hull is.. I have not tried the gallons per minute test from the exhaust port, but now that you have given me a benchmark.. I may try that.. Thanks great video
the strainer will be full of junk, thats what its for. just look if there is water coming out the exhaust and these engines run really cool. Shouldnt overheat. Probably the impeller vanes disintegrating and getting into the elbows feeding the cooler. Your impeller looks fine! they will work with only three or four left. Ask me how I know...:)
yeah seems your system installation doesnt support the greatest water flow through fresh water and you should have larger intake lines to the raw water Jabsco pump equal to the pump intake exhaust, never restricted at any point. Yep, these are noisy buggers!
Problem is that this guy is running raw water through the block, which is great but he doesn't need the thermostat or the engine water pump. just let the raw water pass straight through. problems solved . My two 4108s have been successfully running this way in sea water for 15 years without smoke, instant starting and reliable. only thing I had to do was replace core plugs with stainless steel ones . Wouldn't be surprised if this guy has warped the cylinder head by using thermostats.
"Fresh water" cooled engine. @4:00 you can see him rodding out the heat exchanger core, which transfers the heat from the fresh water going around the outside of the tubes to the sea water that goes through the center of the tubes. Correct thermostat and temperatures where shown.
Thanks for posting this! I just bought a CAL 35 Cruise with a Perkins 4107. Went out today out of Long Beach, CA and my water temperature gauge pegged out at 235°
I limped her back into my slip being careful to watch the oil temp, which never got above 190°, however i could start to smell the coolant boiling off and steam coming out of my engine compartment. I will definitely being using this video to go through the entire cooling system this week.
Thanks again for taking the time to do this!
An excellent methodical presentation, well done. Perkins are a real tough engine and built to last.
Hey Steve, thanks for taking the time to make and post this very informative video. Although I have a Perkins M20, some details were good to know and see, such as the heat exchanger, etc.
Nice Magnum 42. I can tell because I have one too and things inside were starting to look mighty familiar around the 5 minute mark. Thorough process review. Nice job. I think 190, although at the high end of the range, is a normal temperature for a Perkins 4-108. I have read that they run far more efficiently (and happier) between 175 and 190 than their raw water-cooled brethren do at the lower temperatures (at or below 150). Good luck with the boat this season. I'm launching mine for the first time this Spring. Wish me luck.
Thanks for taking the time to produce this video. Very good.
Very well done, thank you for sharing.
great video. Thank you for posting
I have a Perkins 4-108, (1976) (4100 hours) and I was told never to exceed 2200 RPM with it.. I suppose this is all dependent on the transmission and the prop that is installed.. At that RPM, I get about 3 to 3.4 litres per hour ( .8 to .9 US gallons per hour) Dependent on how clean the hull is.. I have not tried the gallons per minute test from the exhaust port, but now that you have given me a benchmark.. I may try that.. Thanks great video
helpful video, thanks
What was the name of the wrench used on the strainer?
How big is your boat? Waht speed to you get at 3000rpm? We dont even get 3000 RPM out of our 4.108.
Do you play bass?
the strainer will be full of junk, thats what its for. just look if there is water coming out the exhaust and these engines run really cool. Shouldnt overheat. Probably the impeller vanes disintegrating and getting into the elbows feeding the cooler. Your impeller looks fine! they will work with only three or four left. Ask me how I know...:)
yeah seems your system installation doesnt support the greatest water flow through fresh water and you should have larger intake lines to the raw water Jabsco pump equal to the pump intake exhaust, never restricted at any point. Yep, these are noisy buggers!
I don’t think using steel threaded rod in a brass tube is a good idea. I personally use a Teflon rifle cleaning rod .22 cal.
Problem is that this guy is running raw water through the block, which is great but he doesn't need the thermostat or the engine water pump. just let the raw water pass straight through. problems solved . My two 4108s have been successfully running this way in sea water for 15 years without smoke, instant starting and reliable. only thing I had to do was replace core plugs with stainless steel ones . Wouldn't be surprised if this guy has warped the cylinder head by using thermostats.
"Fresh water" cooled engine. @4:00 you can see him rodding out the heat exchanger core, which transfers the heat from the fresh water going around the outside of the tubes to the sea water that goes through the center of the tubes. Correct thermostat and temperatures where shown.
No, he's running raw water through a heat exchanger & fresh / coolant through the block.... 2 seperate circuits.
Jonathan Pardoe way off base there...
What was the name of that wrench that he used to remove the strainer cover? Nice in-depth video, thanks for sharing.