Stretchy belt demount and install QSB 5.9 440hp

[Phil Lack]

Having investigated ordering replacement belts as spares for my 2 QSB 5.9 440HP engines, I was surprised to see the single “stretchy” belt used to drive the raw water pump with no visible means of tension adjustment.

Reading up on these belts, I now need to buy a special tool to both demount and re-install these belts and it seems there are a number of types of tools available for the task.

Just wondering who may have also confronted this issue and what tool you used to (mainly) re-install a new belt onto these pulleys ? Also I am wondering if the main belt has to be loosened off in order to manually rotate the raw water pump drive pulley using a socket and wrench as many of the videos show when installing this type of belt.

All this is relevant in the context of swapping out the existing Sherwood raw water pumps for new SMX units as it definitely involves removing these belts. And can these used belts be re-used again as many YouTube videos suggest cutting off the old belts (although these are mainly automotive applications wiht belts on car engines).

regds,
Phil

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[Phil Lack]

Any progress on the belt fitting video ?

regds,
Phil

[Phil Lack]

Tony, looking forward to the video !

regds,
Phil

[Tony Athens]

QSB Stretchy Belt–seawater pump drive

We have a new QSB 480 on our shop floor that we are doing very custom up-fitting for..

On the list of things to do in the next week–A good “How To” video on the R&R the “stretchy belt”..

This will apply to any of the QSB’s with this belt system………………………..All the same — 5.9 or 6.7

Just an FYI–concerning the patent holder of this design of belt–IMO, they redefined the word “stretch” with this belt..

Personally, I am impressed with it after dealing with it in not less that 100 applications over the last 7 yrs or so……………………………………I must admit, I had some serious doubts in the beginning

[Author]

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