Active Unanswered
Model A/B engine generator replacement
Moderators: Don Ayers, Al Benton, Don Vogt
Model A/B engine generator replacement
Hello all:
I'm new to all of this and am curious about replacing the generator belt on my 4 cylinder model a engine. I would like to upgrade to a 12 volt system but looking at the generator and belt I have no idea how to get the belt on and off. Unlike cars where the alternator was on an adjustable bracket the generator bolts into place. Is it just a matter of stretching the belt?
Thanks in advance.
Len
I'm new to all of this and am curious about replacing the generator belt on my 4 cylinder model a engine. I would like to upgrade to a 12 volt system but looking at the generator and belt I have no idea how to get the belt on and off. Unlike cars where the alternator was on an adjustable bracket the generator bolts into place. Is it just a matter of stretching the belt?
Thanks in advance.
Len
Re: Model A/B engine generator replacement
You have to remove either the flywheel or starter to get the belt off/on on most Chris-Craft engines. Here is a photo of the mount with the adjusting slot shown on the right.
Jim Staib
www.finewoodboats.com
1947 Penn Yan 12' Cartopper WXH474611
1950 Chris-Craft 22' Sportsman U-22-1532
1957 Chris-Craft 26' Sea Skiff SK-26-515
1968 Century 17' Resorter FG-68-174
www.finewoodboats.com
1947 Penn Yan 12' Cartopper WXH474611
1950 Chris-Craft 22' Sportsman U-22-1532
1957 Chris-Craft 26' Sea Skiff SK-26-515
1968 Century 17' Resorter FG-68-174
Re: Model A/B engine generator replacement
Thank you for taking the time to answer. I see the adjustment slot in your photo. It makes sense and looks a lot easier to swap out the generator for a new one. Thanks again...
Re: Model A/B engine generator replacement
Jim, you did mean starter or generator, right?drrot wrote:You have to remove either the flywheel or starter to get the belt off/on on most Chris-Craft engines. Here is a photo of the mount with the adjusting slot shown on the right.
Terry
1941 Model 101 (16') Deluxe Runabout "Miss Dot"
1941 Model 101 (16') Deluxe Runabout "Miss Dot"
Re: Model A/B engine generator replacement
Nope.
Look at the photo. No way to get it between the flywheel and starter.
Look at the photo. No way to get it between the flywheel and starter.
Jim Staib
www.finewoodboats.com
1947 Penn Yan 12' Cartopper WXH474611
1950 Chris-Craft 22' Sportsman U-22-1532
1957 Chris-Craft 26' Sea Skiff SK-26-515
1968 Century 17' Resorter FG-68-174
www.finewoodboats.com
1947 Penn Yan 12' Cartopper WXH474611
1950 Chris-Craft 22' Sportsman U-22-1532
1957 Chris-Craft 26' Sea Skiff SK-26-515
1968 Century 17' Resorter FG-68-174
Re: Model A/B engine generator replacement
Gotcha, guess they are all a little different.
Terry
1941 Model 101 (16') Deluxe Runabout "Miss Dot"
1941 Model 101 (16') Deluxe Runabout "Miss Dot"
Re: Model A/B engine generator replacement
On my Model B, the belt was not long enough to fit around the fly wheel alone. No option but to remove it, but that is not a big deal (4 bolts).
I know this has been discussed 1000 times, but I will put in my pitch for sticking with original 6V. I really wanted to keep my boat as "original" as possible, but this is completely subjective. What isn't in doubt is that a 12V system will spin the engine faster and start easier. But it seems to me that this only makes a significant difference for an engine that is not well sorted/tuned. In 5 seasons with the original 6V system, when all is well, my B fires on the first push of the starter button. If it doesn't, something is not right. Timing off, fuel flow issue, etc. Genearally a minor tweak, but I really like the quick engine check every time I start. Finding a 6V bilge pump can also be hard, but I run a standard 12 volt pump using a 6 to 12 Volt converter. Now in year 5 with this as well, with no problems.
I know this has been discussed 1000 times, but I will put in my pitch for sticking with original 6V. I really wanted to keep my boat as "original" as possible, but this is completely subjective. What isn't in doubt is that a 12V system will spin the engine faster and start easier. But it seems to me that this only makes a significant difference for an engine that is not well sorted/tuned. In 5 seasons with the original 6V system, when all is well, my B fires on the first push of the starter button. If it doesn't, something is not right. Timing off, fuel flow issue, etc. Genearally a minor tweak, but I really like the quick engine check every time I start. Finding a 6V bilge pump can also be hard, but I run a standard 12 volt pump using a 6 to 12 Volt converter. Now in year 5 with this as well, with no problems.
Re: Model A/B engine generator replacement
Thanks for the thoughtful responses. I too like the thought of keeping it original but you did nail my concern. My current bilge pump is on its last legs and I can't find a 6v replacement. I didn't even know converters existed. I will look into that.
Re: Model A/B engine generator replacement
thanks, therukauf for the info. the need to convert from a 6v because of difficulty finding a bilge pump has come up a lot before, so it might be helpful to post the info on your converter.
on the point about starting difficulty, I have found the following as a fool proof way to start my 6v KA when cold, and wonder what others do? No gas, full choke, crank until fires. then no choke, moderate gas and it starts right up like a charm every time.
on the point about starting difficulty, I have found the following as a fool proof way to start my 6v KA when cold, and wonder what others do? No gas, full choke, crank until fires. then no choke, moderate gas and it starts right up like a charm every time.
1938 Chris Craft 17' Deluxe Runabout "Jennifer II"
Re: Model A/B engine generator replacement
1948 K, cold start: some throttle, full choke, crank 'til fires which usually is fairly quick and on firing immediately no choke and adjust throttle. Works for me with very rare exception.
Re: Model A/B engine generator replacement
To follow up on the 6V to 12V converters. They are marketed to vintage car owners who want to run modern 12 V accessories. I picked mine up on e bay for around $60. It's rated for 5 amps, and my 500 gph pump is 3.5 amp, with suggested 5 amp fuse. It works fine. I did try the pump on 6 volts, and it runs but is sluggish. I suspect would have a short life, and definitely not 500 gph.
Bill
Bill
Who is online
Users browsing this forum: No registered users and 16 guests