[TR] [6pack] TR250/TR6 fuel pumps

Mon Jan 6 10:33:00 MST 2020

Friends,

Years ago (mid 70’s) I was given a TR6 with a blown engine. Didn’t know why the engine had gone bad.  The previous / previous owner had taken it to shop for some reason and they did a Valve Job. A friend bought it and we swapped some stuff and I ended up with the car. Pulled the engine and found the rod bearings badly worn, one was blue from heat and at least 1 rod needed re-sized along with a crank regrind. Put it all back together, fired it up and began driving it. Checked the oil a week later and it was UP not down. Smelled it and strong gasoline smell. Turns out the cause of everything was a stock fuel pump; pumping gas into the crankcase and thinning the oil. Promptly replaced the pump with a new stock one and drove the car for several months until I sold it. I had my 4A and didn’t need 2 TR’s at the time. I liked that car but it was starting to rust in all the logical places. Moral is smell your oil every time you check it.

JVV

From: DAVID MASSEY 
Sent: Monday, January 6, 2020 7:47 AM
To: elliottr at rmi.net ; triumphs at autox.team.net 
Subject: Re: [TR] [6pack] TR250/TR6 fuel pumps

Those SU pumps had a major weakness, the points.  The points get dirty and no longer conduct current to the coil.  The modern after market pumps are electronic and have no such problem.  Plus, these new pumps have no seals or diaphragms that can cause a leak.  I've had two mechanical pumps fail on me although not the catastrophic failure where your crankcase gets filled with gasoline.  Not a possibility with an electric pump.

Dave 

-----Original Message-----
From: Roger Elliott <elliottr at rmi.net>
To: triumphs <triumphs at autox.team.net>
Sent: Sun, Jan 5, 2020 3:58 pm
Subject: Re: [TR] [6pack] TR250/TR6 fuel pumps

We go on a drive (400 - 600 miles) every year with a bunch of MGs,  which come electric pumps, and Triumphs. Most, if not all, MGs carry a spare electric pump that they can put in line quickly if one fails.  It hasn't happened in the last few years, but for quite a while it was normal for for at least one electric pump to go out on the drive.  There has never been a mechanical pump failure that I recall.

I think, we have replaced the mechanical pump in my Spitfire and my wife's TR250 once each in over 30 years of owning both of them. Although, I did have to repair the one on the TR250, by staking the valve in place.

I am happy with the mechanical ones.

Roger

On 1/5/20 8:42 AM, DAVID MASSEY wrote:

+1

I've run the same electric pump on my TR6 since the 1990's and it hasn't missed a beat (no pun intended).

That said, I still have the original style pump on the TR3 for concours reasons.

Dave 

-----Original Message-----
From: Bob via 6pack <6pack at autox.team.net>
To: dctr6 <dctr6 at optonline.net>; 6pack <6pack at autox.team.net>
Cc: triumphs <triumphs at autox.team.net>
Sent: Sat, Jan 4, 2020 2:36 pm
Subject: Re: [6pack] [TR] TR250/TR6 fuel pumps

Dennis,
I know this issue has been thrown around since the lists started but why not convert to an electronic pump? I have been running an electronic pump on my 3 for 20 years, my 4 for 15 and my 6 for 10. Zero issues. And no oil leaks from the pump or where it attaches to the block. No worry if the cam is too warn out to operate the lever.
Bob

On 1/4/20 2:40 PM, dctr6 at optonline.net wrote:

   Does anybody know what the difference is between the fuel pump that Moss sells for $29.99 and the 
one that the Roadster Factory sells for $99 (besides the $70 price discrepancy)? They appear the same 
in the catalogs. I have traditionally bought from TRF and I believe the one they sell is made in Italy? Can 
the recently retired Peter Arkelian shed any light on this?  Thanks.  
Dennis Culligan, Highland, NY / 1976 TR6 CF57948U

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