64 inboard
Well-known member
I have been having problems with my 64 Correct Craft boat with a 170 inboard motor,not wanting to turn over 2200 rpm's under load. Here's a little history:
Last May I installed a "new" head. It was from a 1979 200. I had the head rebuilt. it was milled .060, new valves and springs were installed. I cleaned up the rough castings in the combustion chambers and port matched the aluminum exhaust manifold. I had to make a SS elbow to adapt the Carter YH sidedraft carb. This Elbow has a 1 3/4" IS dia. to match the intake hole. (The original only had a 1 3/8" hole... it also let the carb bowl hit the larger intake runner of the 200 head.
When I got the motor back togeter, it ran great in the driveway, cooled by a garden hose. It will rev up to redline no problem. The first time I took it out, it fell flat on its face around 2200 R's.
To date heres some of what I've tried..
Rebuilt Carb.
Rebuilt mechanical fuel pump.
All new fuel lines.
Added spin on type fuel filter.
Replaced Mallory dizzy from another motor.
New points, cap, condenser, rotor.
Changed ignition coil (from another motor)
New steel exhaust pipes.
Motor idles with around 17 to 18" of vacuum.
Set timing at 10BTDC per manual(as well as 10 to 15 more/less each way)
Dont know total advance, but with light it moves when throttle is cracked.
I have run an electric fuel pump "plumbed" into a 5 gal gas can
and running directly to the carb, completely eliminating the boats fuel system ...still no go.
Thoughts?
btw hers a pic of the motor...
Last May I installed a "new" head. It was from a 1979 200. I had the head rebuilt. it was milled .060, new valves and springs were installed. I cleaned up the rough castings in the combustion chambers and port matched the aluminum exhaust manifold. I had to make a SS elbow to adapt the Carter YH sidedraft carb. This Elbow has a 1 3/4" IS dia. to match the intake hole. (The original only had a 1 3/8" hole... it also let the carb bowl hit the larger intake runner of the 200 head.
When I got the motor back togeter, it ran great in the driveway, cooled by a garden hose. It will rev up to redline no problem. The first time I took it out, it fell flat on its face around 2200 R's.
To date heres some of what I've tried..
Rebuilt Carb.
Rebuilt mechanical fuel pump.
All new fuel lines.
Added spin on type fuel filter.
Replaced Mallory dizzy from another motor.
New points, cap, condenser, rotor.
Changed ignition coil (from another motor)
New steel exhaust pipes.
Motor idles with around 17 to 18" of vacuum.
Set timing at 10BTDC per manual(as well as 10 to 15 more/less each way)
Dont know total advance, but with light it moves when throttle is cracked.
I have run an electric fuel pump "plumbed" into a 5 gal gas can
and running directly to the carb, completely eliminating the boats fuel system ...still no go.
Thoughts?
btw hers a pic of the motor...