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Search: Posts Made By: mpascual
Showing results 1 to 14 of 14
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Forum: Gas Engines
07-13-2014, 04:13 AM
Replies: 1,678
Views: 463,131
Posted By mpascual

I'm testing the new OHC A38 engine and i'm very...

I'm testing the new OHC A38 engine and i'm very impressed con how ir performs.

Is not a hi-rpm engine, better with a hi-load prop.
With a 20x8 wood prop, it's about 6.100 rpm.
No belt-drive...
Forum: Gas Engines
07-14-2013, 11:11 AM
Replies: 1,678
Views: 463,131
Posted By mpascual

RE: NGH 38CC 4 stroke

SJN
Very interesting
I'm waiting your pictures ....
Best regards
Forum: Gas Engines
12-09-2012, 05:57 PM
Replies: 1,678
Views: 463,131
Posted By mpascual

RE: NGH 38CC 4 stroke

RCEXL ignitions on NGH engines are standard A01 module.
I think some people does not check the angle properly.
On NGH engines (GT9 included) the manufacturer says the angle is 40 degrees BTDC ,...
Forum: Gas Engines
12-09-2012, 04:27 PM
Replies: 1,678
Views: 463,131
Posted By mpascual

RE: NGH 38CC 4 stroke

Mine works fine.

Best regards
Forum: Gas Engines
12-05-2012, 05:08 PM
Replies: 1,678
Views: 463,131
Posted By mpascual

RE: NGH 38CC 4 stroke

NGH says between 0,03 and 0,08.
When i set the clearance on gas engines, like SAITO, and this one NGH i set the clearance to almost zero without the feeler gauge. But i'm sure the valves are fully...
Forum: Gas Engines
12-05-2012, 08:12 AM
Replies: 1,678
Views: 463,131
Posted By mpascual

RE: NGH 38CC 4 stroke

One is to give pressure pulses from crankcase to the carb.
The second one is to release high pressure inside the crankcase when the piston is going down, to the intake mainfold, and also to get...
Forum: Gas Engines
12-05-2012, 07:56 AM
Replies: 1,678
Views: 463,131
Posted By mpascual

RE: NGH 38CC 4 stroke

From Saito gas engine user manual (2012 version)
.....
In that position, adjust with the included gauge and
hexagonal wrench so the tappet gap may be set to
almost zero when the engine is in...
Forum: Gas Engines
12-05-2012, 07:41 AM
Replies: 1,678
Views: 463,131
Posted By mpascual

RE: NGH 38CC 4 stroke

Ok. Set your valve clearance at your preference.
Check the clearance when engine is very hot and after a full tank, and then let me know the clearance. Then maybe you will change your opinion.
...
Forum: Gas Engines
12-05-2012, 02:36 AM
Replies: 1,678
Views: 463,131
Posted By mpascual

RE: NGH 38CC 4 stroke

Be careful with valve clearance.
On engines like this one I always set valve clearance close to zero (no clearance) but avoiding pressing the valves, when engine is cold.

Best regards
Forum: Gas Engines
12-04-2012, 09:44 AM
Replies: 1,678
Views: 463,131
Posted By mpascual

RE: NGH 38CC 4 stroke

I always verify/adjust the timing with a timinig wheel. In this case was OK from factory.
I will try with different ignition 'curves' but i suspect (as with many others engines) , the standard...
Forum: Gas Engines
12-03-2012, 04:59 PM
Replies: 1,678
Views: 463,131
Posted By mpascual

RE: NGH 38CC 4 stroke

All engine parts look very well built. Also i've received some technical explanations from Michael about lubrication inside the engine parts, the reason to mount two piston rings, the pressure ...
Forum: Gas Engines
11-19-2012, 01:05 PM
Replies: 1,678
Views: 463,131
Posted By mpascual

RE: NGH 38CC 4 stroke

Some pictures of engine:

Exhaust valve guide. It seems bronze. Picture taken with a USB microscope through exhaust mainfold. Well lubricated !!!!

The connecting rod with needle bearings on...
Forum: Gas Engines
11-18-2012, 02:36 PM
Replies: 1,678
Views: 463,131
Posted By mpascual

RE: NGH 38CC 4 stroke

Sorry
I don't know.
Forum: Gas Engines
11-18-2012, 02:09 PM
Replies: 1,678
Views: 463,131
Posted By mpascual

RE: NGH 38CC 4 stroke

First test on a production unit today:

GREAT ENGINE !!!!!
Include the engine mounting plate, RCEXL ignition, allen wrench, RCEXL standard CM6 spark plug,
My only guess is to include a 120...
Showing results 1 to 14 of 14


 
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