I want to make changing my diesel filters easier by installing a hand pump upstream of my secondary CAV filter. I find this filter a pain to fill up after changing and a pump up stream will make it easy to fill.
I have a new inline outboard hand pump which I could install. A mechanic mate said it should be fine as outboard fuel is more corrosive and damaging than diesel. Another blog had one person say the hand pump only lasted a year, another person said they had used one for 10 years with no problems.
Anybody had any experience of using these in line hand pumps intended for outboards on diesels?
Cheers
Perkins motors in gen sets use these pumps and seem to be no problem.Maybe contact a perkins agent and see what they say
^^^ yep as do volvo (the same really) used it a few times on the penta 50hp on the sailing thingy and never had a problem.
G'day Graham,
Morning Bird has a Sole, Mitsubishi based, 20 hp 3 cyl donk. It is mounted midships above the keel with the fuel tank under the port pilot berth. I can gravity feed the CAV filter with the tank full. Unfortunately the owner who fitted her out cocked up the tank installation and I can't turn the fuel tap on the tank off so, if it is full, I have diesel going everywhere while I am doing the job. I let the fuel level drop to below the filter when a service is due to avoid this problem.
Once the filter is back together I can add more fuel to the tank to raise the level but as you note it takes forever to syphon through by gravity alone. Getting the fuel to flow through into the filter by blowing into the small hole in the tank used to dip the fuel level is the pain.
You are right that once the CAV filter is full the main filter on the engine is easy, use the lift pump, or quicker, open the bleed valve and have someone crank the engine for 20 seconds until it stops blowing air. The engine normally starts at the same time.
I want the easiest solution which appears to be the hand pump inserted in the hose just up stream of the CAV filter. I can change the filter without having fuel go everywhere and then just pump it through.
My concern is that the hand pumps intended for use with outboard fuel may cause problems if used with diesel over a long time.
Filters for outboards are a bit coarser than for diesel so the oil can pass. Whitworths catalog gives the actual sizes.
Sucking diesel is a bit of a pain. When I siphon diesel I use a plastic hose placed into the drum then a second hose about a foot long into the top above the diesel. Then with a rag sealing off the top as best as possible I blow into the short hose. Just keep the short bit of hose reserved for your mouth.
On the mercedes busses some had a remote diesel hand pump for if you ran out of fuel to bleed them alloy housing with plastic pump. Any truck parts place will get one for you. If you are in Sydney pioneer parts or whites diesel will definatly be able to help you.
I have an electric inline pump directly after the tank on my boat I use it when changing filters run it for a while and the filters bleed themselves back to the tank
Doubles as a backup for the mechanical pump should it give trouble
Works well for me and has done for years
Hiko,
What brand/type of pump are you using? There are heaps on eBay, I was wondering if there is anything special to look for.
Cheers
