This web site aims to show off our wonderful hobby to members and non members alike,
as well as being informative in terms of our racing, venues, events etc. In addition,
sometimes things do go wrong with boat builds and we all can learn lots from our
mistakes! Two interesting tales follow, first from Harry Stuart, next from Bernard
(Feel free to publish as it may save someone from making the same mistake. I'm thick
skinned as well as thick headed (on occasion))
A re learnt lesson in what can happen if you don't ensure that the fuel tanks have
a clear air vent.
Mine got nipped early on in testing the new Skippy boat and the pictures tell the
Would pull away fast then get slower and slower till stop. then after recovering
would restart ok then do the same again.
But if brought back to the side when running slow it wouldn't restart for a long
Obvious now but its all down to geriatric stupidity on my part mainly but also the
otherwise excellent features of the Walbro carb with its powerful pump and shut off
As I have 3 large tanks in the boat and only filled the first one, there was a big
air capacity for the pump to pull against before it began to effect the fuel flow
so the engine slowly gets leaner and leaner (and the lube depletes of course). When
finally stopping, the demand valve slams shut and seals the vacuum in the tank. making
it hard to restart until the air trickles back into the tank over time. So all explained
by a previously hard learned lesson forgotten all over again.
Will do a cheap skate recovery of the excellent quality Tiger king with a new piston,
wrist pin, ring and little end bearing. I've rubbed the high spots of the liner and
scraped the shards of metal out of the cylinder head button. about £35 the lot.
My excellent friend and fellow Herrington MPBC club member Keith Mallam, took pity
on me and has leant me a Zen 320 for this coming week end. (after injuring himself
laughing at my cock up of course.)”
PISTON & LITTLE END DAMAGE
SUM OF DAMAGE
Below Harry Stuart tells in his own words a story which I have taken note of, as
I wouldn’t like to repeat the simple mistake Harry made. Thanks Harry for sharing
this with us. Harry’s words below tell the story which is self explanatory.
Salt water running can corrode engines so be sure to rinse the cooling circuits out
after running! This CMB 45 ran by Bernard Holder suffered restricted cooling flow
- photo below shows why!! A new water jacket solved the problem! Amazing! Bernard
tells the story below. I would have probably thrown the engine in the bin!! Binning
a good power plant!
Photo attached of one of my CMB 45 engines that was in the Crusader 11 I lent to
Paddy McGuiness to use at Weymouth July 2009 when recording Greatest British Adventures
for his and Rory McGrath's television programme. About a year or so back I tried
running the boat again up the Keepers Pond and found there was no water coming out
of the water cooled head outlet pipe - this was why. Fitted another water jacket
and it's running fine, motor not had a great deal of use. It was shortly after this
that I became ill and probably forgot to flush out the water jacket after salt water
Photo attached you might like to put underneath the one of the OOPS CMB 45 salted
up. Some while ago I put another water jacket on it and went with my colleague Richard
Jordon up the Keepers Pond Saturday morning and gave it a run - Ballistic! New water
jacket fitted and tested, still going like a rocket! It's faster than the one I race
probably because it's newer. It was good to get out for a while. As I recall it was
an newish engine that Paddy McGuiness ran in Weymouth 2009 for the television programme.
UPDATE 4th November 2015:
If you thought like I did, the above engine was beyond redemption, just read Bernard’s
comments below. Unbelievable!