Yanmar impeller - HOW much?

Robin

Robin

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Just got the bill for this years service and the new impeller for our Yanmar 4JHE 44hp cost just on £50 from the local Yanmar Dealer! Previously I had supplied these from my own stock as they were the same ones fitted to our last boat's Volvo MD22L, plus some spares came with the latest boat too.

I have just checked the 2006 Accastillage Diffusion (France) chandlery catalogue and the same impeller, but not Yanmar or Johnson costs just 11 Euros (£7.50), the branded Johnson (who make the pump) version is 28 Euros (£18.50). I also looked at ASAP in the UK but without the part No I need to check more, but it looks like around £20 or so from them, I guess generic rather than OEM.

First job next French trip then is to stock up on impellers from Acccastillage Diffusion in Cherbourg!

I had already sourced alternator belts via our local specialist and bought higher quality cogged belts for about half the Yanmar price.

Don't you just LOVE being ripped off.
 
"I had already sourced alternator belts via our local specialist and bought higher quality cogged belts for about half the Yanmar price."
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I fit the standard Yanmar belts and seem to go through them at the rate of one every 100 hours or less. Are the cogged ones better and if so do you know who supplies them?
 
I just looked at the Aqua-Marine Yanmar website who offer the 4JHE service kit for £54. Includes
Part Number: 129150-35152 Oil Filter
Part Number: 129670-42530 Impeller
Part Number: 119773-42570 Impeller O.Ring Cover
Part Number: 129470-55702 Fuel Strainer
Part Number: 25132-004600 V-Belt

Which sounds ok to me as I've just done mine, I sourced mine from MarinePower in Gosport though and serviced myself.
 
The toothed ones seem to grip better for a given tension, they also seem to wear less too but not sure why. If you go to a good motor factor or drives supplier with the belts you should be able to get them for a fraction of the price.
 
We have two 90A alternators, the Yanmar one is a Hitachi standard fit but optional high output and the other is a Yanmar add-on but a Lucas (Magnetti Marelli) one. Both of these alternators have Adverc smart regulators on them so loads can be high, yet we have never had a problem with belt wear. As a matter of routine I fit new belts every winter and keep the old ones as spares but after around 120/130hrs per year they still look fine, I just prefer not to have a problem say in fog in the lanes with no wind!

Ashley Power in Ashley Road, Parkstone, Poole (Tel 01202 746031) are the people I bought them from see here They tell me that the cogged ones are more flexible and stand up better to going round small pulleys, I think they are about 40% more expensive than the plain belts of the same size.
 
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I fit the standard Yanmar belts and seem to go through them at the rate of one every 100 hours or less. Are the cogged ones better and if so do you know who supplies them?

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Its worthwhile doing a quick check of the pulleys. I had the same problem on a GM20. Rust doesn't help and I found that when the engine was painted (from new) that there was a very slight piece of paint that had dribbled inside the pulley and stood proud. Sanded down and cleaned rust off and belts went on for ever.

Donald
 
I will try that. Robin uses 2x90A alternators and I have only one with the 75hp engine. My first belt lasted quite a long time but since it failed belt life seems to have fallen dramatically. I will fry refinishing the pulleys and swapping to a cogged belt. Hopefully that will work. Thanks for the advice guys.
 
That's better value as a service pack than I got, but then I didn't need them to supply the V Belt.

Our engine is serviced by our club engineer and they probably were unaware there was a service kit, as I was! The two filters were about £9.40 ea so bought separately from the local Yanmar man the whole kit like you got would be around £80.
 
Forget the Yanmar ones. Buy Globe blue equivalent from ASAP supplies. They are cheaper, and much more robust, even if you run them dry.
 
Not the same engine I know, but our Yamnar is still on the same belt fitted in 2000! (I do carry a spare 'cause it has to give up one day!)
 
I seem to be forever tightening up the belt on my 1GM10 and they don't seem to last very long at all before I get slippage. The front of the engine is covered in rubber. Anyone had this problem on a 1GM10?
 
I have had more black dust when the belt was too loose (note spelling of 'loose' not lose!).

When tightened a bit more, less rubber was found. I don't know the mechanics of why this should be so.
 
The power transmitted through the belt to the alternator is quite considerable on first starting, as the alternator charges the battery. The drag on the belt is therefore high and if it is loose there will be considerable slippage. This can often be heard in cars accelerating from junctions, as a screeching sound that lasts a few seconds until the belt catches up with the flywheel pulley. The slippage generates wear in the belt, hence the wear product - black dust.

The answer is to ensure that the belt is tight. Not too tight, as this is likely to reduce the life of the alternator bearings. If the alternator persistently moves, check that tightening the bolts actually stops it from moving. If you have to re-tighten it frequently you are almost certainly not tightening it enough, or the pulleys are misaligned and wear is occurring on the flanks of the belt.
 
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The toothed ones seem to grip better for a given tension, they also seem to wear less too but not sure why. If you go to a good motor factor or drives supplier with the belts you should be able to get them for a fraction of the price.

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Never do that! The motor factors supply standard sized belts which are a different profile to the one that Yanmar use. They are a tiny bit narrower (like half inch rather than 13mm) and the angle is different. The result is that they quickly bottom in the pulley groove (belts are supposed to take the load through their sides)and wear like the proverbial.

If you dont want to pay yanmar prices (and who does) go along to Fenner power transmissions (yellow pages, every large city) and get a much cheaper replacement belt with the correct profile.

Took me half a dozen belts and a new pulley before I Found out what was happening and solved this problem with a Yanmar GM10
 
Sorry to bo the bearer of bad news! I was going to buy a Globe from ASAP at the LBS to be told they don't do them any more because the U.S suppliers had put their prices up too high,[due to the fact that they were not selling enough of them to be viable.]
 
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