Any tips how to exchange the Impeller on a Yanmar 4JH4TE diesel motor? I read it is on the port side below the alternator - difficult location!
Thanks,
Viktor
Thanks,
Viktor
Impeller exchange on Yanmar 4JH4TE
- Thread starter Viktor Eysselein
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Pump access
The back side of the pump is the side that comes off. 4 machine screws if memory serves. The impeller just pulls out after that. BEFORE you pull the impeller note which way the vanes are bent and write it down so you can get the new one installed correctly.
On my 40.5 it is pretty easy to get to from the port engine panel.
The back side of the pump is the side that comes off. 4 machine screws if memory serves. The impeller just pulls out after that. BEFORE you pull the impeller note which way the vanes are bent and write it down so you can get the new one installed correctly.
On my 40.5 it is pretty easy to get to from the port engine panel.
I cut an access port on the port side of the engine box. I also installed a speed seal to make the r/r of the impeller easier.
All the boats are a little different so how you attack you problem may be quite different.
All the boats are a little different so how you attack you problem may be quite different.
At the risk of letting everyone know my.....
Well I'll tell you, I have tried all of one tool to remove all my impellers, a pair of needle nose pliers. This assumes that you have on hand a replacement impeller. You grab an impeller vane and pull. If it does not come out immediately, move to the vane on the opposite side of the shaft and pull. Repeat till she comes free. Try to not rotate the pliers and damage the vane. If you damage the vane replace the impeller and use the old one as an emergency replacement spare.
Well I'll tell you, I have tried all of one tool to remove all my impellers, a pair of needle nose pliers. This assumes that you have on hand a replacement impeller. You grab an impeller vane and pull. If it does not come out immediately, move to the vane on the opposite side of the shaft and pull. Repeat till she comes free. Try to not rotate the pliers and damage the vane. If you damage the vane replace the impeller and use the old one as an emergency replacement spare.
Re: At the risk of letting everyone know my.....
OK, that's exactly what I do. My Speedseal kit came with a remover took, but it seems no better, and I just use the needle nose. In fact, I have a new impeller ready to go in; I'll save the best of the old for a spare. I was hoping there was a better way.
OK, that's exactly what I do. My Speedseal kit came with a remover took, but it seems no better, and I just use the needle nose. In fact, I have a new impeller ready to go in; I'll save the best of the old for a spare. I was hoping there was a better way.
i read that a rectangular plier is useful due to the location -
I bought one at PEP boys.
Thanks for all the good advice!
Viktor
I bought one at PEP boys.
Thanks for all the good advice!
Viktor
I used needle nose vise-grip pliers (angled and straight) this year and pulled from both sides for an 1 1/2 hours. Finally got it when a friend to pulled on one side while I pulled on the opposite side. Came right out. Coated the shaft of the new one with a lube, but don't think that will help since it was only 1 year old. So after 1 1/2 hours of pulling my guts out, I purchased a Jabsco compact impeller puller from Amazon (max 2 1/4"). It came in this week and plan to use it this weekend on my buddy's 40.5. The Amazon picture below is wrong. Correct picture can be found at Defender for the compact size.
Jabsco 50070-0080 Marine Impeller Puller (Compact, Up to 2.25" Diameter) (Mar. 10, 2007)
Buy new: $80.99 $60.65
Get it by Wednesday, Nov. 24 if you order in the next 10 hours and choose one-day shipping.
Eligible for FREE Super Saver Shipping.
Only 4 left in stock - order soon.
Sports & Outdoors: See all 2 items
Correct Picture:
Jabsco 50070-0080 Marine Impeller Puller (Compact, Up to 2.25" Diameter) (Mar. 10, 2007)
Buy new: $80.99 $60.65
Get it by Wednesday, Nov. 24 if you order in the next 10 hours and choose one-day shipping.
Eligible for FREE Super Saver Shipping.
Only 4 left in stock - order soon.
Sports & Outdoors: See all 2 items
Correct Picture:
Tip
A tip I got from someone with much more experience than myself that made replacing the impeller much easier.
After removing the cover, put a little detergent around the impeller. With the raw water intake turned off, turn the ignition on just enough to turn the impeller and get the detergent worked in. The impleller slides out with little trouble.
Bill J
A tip I got from someone with much more experience than myself that made replacing the impeller much easier.
After removing the cover, put a little detergent around the impeller. With the raw water intake turned off, turn the ignition on just enough to turn the impeller and get the detergent worked in. The impleller slides out with little trouble.
Bill J
Proper technique with pliers
After you have done this type of thing for several years you develop a feel for "teasing" the offending part out without much hassle. You certainly do not want to pull really hard on one side and then do the same on the other. I have found that moving it just a little on each side is much more effective. You are pulling too hard and the impeller shaft is jamming sideways in the pump shaft housing. By taking smaller steps you don't jam the shaft and the impeller just "walks" out easily.
After you have done this type of thing for several years you develop a feel for "teasing" the offending part out without much hassle. You certainly do not want to pull really hard on one side and then do the same on the other. I have found that moving it just a little on each side is much more effective. You are pulling too hard and the impeller shaft is jamming sideways in the pump shaft housing. By taking smaller steps you don't jam the shaft and the impeller just "walks" out easily.
In the past I've used a hose clamp over the new impeller making sure the vanes were bent in the right direction. Be sure to cover only the outer half of the impeller. Once you slip it in you can release the hose clamp and push the impeller all the way in.
I like the idea of detergent. Must be something wrong with that--it's too simple. Nice idea.
I like the idea of detergent. Must be something wrong with that--it's too simple. Nice idea.
Interesting Impeller Exchange
I just replaced my impeller on my 4JHE. I ordered the Yanmar 129670-42531. I pulled it out of the package which had the Yanmar logo and correct part number and looked at it. It was marked as a Johnson 1029 BT. Anyway, it seems to match although it has more vanes and a larger hub. However, it slipped right on and pumps well. Yanmar must have run out of their own branded units and substituted the Johnson. It does say "Made in Sweden" so that appears consistent.
BTW, it was still a bear to get the old impeller out. 30 minutes of pulling and cursing and repeat.
I just replaced my impeller on my 4JHE. I ordered the Yanmar 129670-42531. I pulled it out of the package which had the Yanmar logo and correct part number and looked at it. It was marked as a Johnson 1029 BT. Anyway, it seems to match although it has more vanes and a larger hub. However, it slipped right on and pumps well. Yanmar must have run out of their own branded units and substituted the Johnson. It does say "Made in Sweden" so that appears consistent.
BTW, it was still a bear to get the old impeller out. 30 minutes of pulling and cursing and repeat.
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