Tom Tall, I doubt its a class A.
Tom Tall:
Mark Suter has a description problem. He might have it described as a Class A Alky but the problem is that the block has the class B number of head bolts and bolt pattern (class A Harrisons used 6 bolt heads where class B Harrisons use 10 bolt heads). The Harrison B block I am restoring has the same number of bolt/stud holes at the head as his does, 10 bolts. In fact his ignition coil pack of 2 also sits on the same cast holder as the class B Harrison. Class A Harrisons as well as class A Anzanis used only a 6 head bolt/stud pattern and from the study I made are interchangeable.
It could be that Mark Suters's Harrison is a sleeved down bore to class A (15 cubic inch) class B Alky block. Only taking off the head and measuring the bore will verify the displacement. Harrison already knew from what they knew about class A and B Anzanis using a 6 head bolt / stud pattern that for class A the 6 bolt/stud pattern would do but as 6 bolts for class Bs the Anzanis heads leaked without special work needed be done to minimize leakage so on the Harrison class B engines they, Harrison added 2 more head bolt/studs per cylinder (10 in total) to surround each cylinder just like that of a Quincy Flathead 2 cylinder A or B to eliminate the head to block leakage possibilities from happening and that did the trick for the class B Harrisons quite well.
One other point is that I have had some information from others that Harrison class As didn't come with 3 carbs like Mark Suters, only 2 at most.
This why I believe Mark Suter's Harrison is not a class A but a class B Alky. It sure does not take anything from its collectors value as a class B as with a class B like that Harrison set some amazing competition records. Some one might have sold it to him as an A but sometimes when these engines come up for sale the seller might not know anything about them clearly as a result I think he got a more valuable collector engine as a result, maybe? :)
Descrition Problems on Harrison
John -
Thanks for your input. I know that many highlights came out of the 1000cc knoig post I did on that engine which in turn allowed Mark to restore it as close to original as possible. Possibly your input on the Hirrison will shed some new found light on it as well. If in deed the Harrison does prove to be a "B" class engine then I will make sure the post will be updated. Until then I have to except the fact that Mark knows what he has. I take your input seriously by the way as I know you know your stuff on these exotics as well. Thanks again.
Your most welcome Tomtall.
Tomtall:
There is a Harrison section here on BRF with loads of pictures as well as pictures in the Anzani thread as well with interlocking comparrison pictures and write ups. They should help Mark Suter to positively identify if his beautifully restored engine is a Harrison A or B once he takes the head off to measure the bore.
No matter what Mark's engine is I am only at a starting point with the A and B Harrisons I am restoring as they are more Harrison / Anzani 1 and 2 carb hybrids as his more Harrison with 3 carbs as to a very lesser degree Anzani which on his seems only to be the Anzani gearcase on his. Put a Harrison gearcase on his and his becomes all Harrison and not at all any kind of a hybrid what so ever once that is done. It would then be a purely American racing engine.
Michael Schmidt's build of a 250 Kawaski (1990s)?
I was looking at Mark Suter's collection on the Quincy website trying to figure out if Kawaski ever made a made of racing outboard racing engine, 250cc or what ever so that looks like it? It was built and run successfuly by Michael Schmidt in the mid 1990s?