AMB

Just got done rain on the way outside temp 87F fuel DAVIS Abc prop GRAUPNER 12 x6 2 blade CORRECTION HAD STATED 12X7 IT IS A 12X6
max idle
Irvine diesel factory head 9600 2300
Irvine diesel davis head 9600 2300
supre tig 40 davis head 9120 2250
MVVS 40 davis head 9000 1650

both irvines MVVS 4225A mufflers tank pressure
Supre tiger the small economy muffler stock
MVVS stock muffler

there was a small drift in rpm on all of 50 to 100 rpm the MVVS had the lowest idle and it may need a little tweeking think the rpm a little short
also the ST is a ringed engine ,Martin

all ran pretty clean not a lot off smoke

AMB

Guys the irvine 40 runs the same with the stock or davis head the reason for my conversions is to not have an issue with dropped contras since it happened once just good insurance
the engines are not replaceable martin

and if my memory is still intact they do run in the mid 10K range with a 12x6 APC

CORRECTION ALL -----SORRY THAT FAT BLADE GRAUPNER WAS A 12X6 NOT 12X7 ON THE ABOVE RUNS I JUST CAUGHT THIS AS I PUT THE PROP AWAY

davec415

I Have a thundertiger outboard and it's the same as a k/b .21 outboard is there anyway I can convert the thunder tiger to diesel if so how

AMB

A couple of years ago this came up with a conversation with bob davis K and B s outboard was made by John Brybeck ( hope spelling is right) of K and B out of respect for him
no one else copied it. He has of course since passed away I would guess the TT is not the same thus the K and B head would not interchange if there is a a head for the Kand B at this point you may be in a dead end on this one martin

davec415

ok I do have a k/b 3.5 outboard and according davis diesel web site they have a head for it. I just need to completely rebiuld it. I need a piston and sleave con rod and gasket set to get it up and running. Question do I need to break it in on glow or can I just convert it to Diesel

AMB

you are starting over glow break in martin